cedar fort - utah geological survey
TRANSCRIPT
Qaf
Mgbu
Qc
Mgbu
Mmc
Mgbu Qmso
Qaf
Qmsy
Qafo
Qaf Qal1Qafo
Qafo
Mmc
Mmc
Qaf2Mmc
IPMowc
IPMowc
Qafo
QafoQal1
IPobp
Qac
IPMowc
IPobp
Qafo
Qal1
IPobp
IPobp
IPobp
IPobp
Qlgb
Qafy
Qafy
Qafy
Ql/Qafo
Qaf2
Qafy
Qafy
Ql/Qaf2
Ql/Qaf2
Qaf2
Qaf2
Qaf2
Qaf2
Qaf2
Qafo
Qafo
Qafo
Md
Qaf2
Qaf2
Qafo
Qafo
Qafo
MhMh
Qafy
Qafy
Qafy
Ql/Qaf2
Ql/Qaf2
Qlag
Qaly
Qaly
Qaly
IPobp
IPobp
IPobp
IPobp
IPobp
Qafc
IPobp
Qlgb
Qlgb
Qlgb
QlgbQlsb
Qlsb
Qlgb
Qlsb
Qlsb
Qlsb
Qla
Qlgb
Qafy
QlgbQlgb
Qed
Qel
Qed
Qlmb
Qlmb
Qlmb
Qlmb
Qlmb
Qlmb
Qlmb
Qlmb
Qlmb
Qlmb Qaly
Qla
Qaly
Qlmb
Qlmb
QlmbQlmb
Qlmb
QlmbQla
Qlmb
Qlsb
Qlsb
Qlsb
Infe
rred
Cedar
Vall
ey te
ar fa
ult
A
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Qafy
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Qafy
Qaf2
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Qlgb
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Qafy
47
49
20
26
23
17
27
20
20
18
20
30
36
43
35
40
3
15
22
18
5
46
35
53
53
52
4249
40
4839
38
42
50
42
45
50
B
B
B
B
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BB
B
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CANYON
SYNCLINE
POLE
ANTICLINE
RIDGE
LONG
UTAH GEOLOGICAL SURVEYa divison ofUTAH DEPARTMENT OF NATURAL RESOURCESSTATEMAP Agreement No. 01HQAG0100
1 0.5 0
1 0.5 0 1 KILOMETER
1 MILE
SCALE 1:24,000
CONTOUR INTERVAL 20 FEETSUPPLEMENTAL CONTOUR INTERVAL 5 FEET
NATIONAL GEODETIC VERTICAL DATUM OF 1929
01000 1000 2000 3000 4000 5000 6000 7000 FEET
2004 MAGNETIC DECLINATIONAT CENTER OF SHEET
UTAH
GEOLOGIC MAP OF THE CEDAR FORT 7.5' QUADRANGLEUTAH COUNTY, UTAH
byRobert F. Biek
2004
Field work by author July 2001 to June 2002GIS compilation by Peter Thompson and Darryl Greer
Cartography by James Parker
Base from U.S. Geological Survey,Cedar Fort 7.5' quadrangle, 1993, with modifications
Utah Geological Survey Map 202Geologic Map of the Cedar Fort 7.5' Quadrangle
13°0'234 mils
1. Lowe Peak2. Tickville Spring3. Jordan Narrows4. Mercur5. Saratoga Springs6. Fivemile Pass7. Goshen Pass8. Soldiers Pass
1 2 3
4 5
6 7 8
ADJOINING 7.5' QUADRANGLE NAMES
QUADRANGLE LOCATION
A'
Research supported by the Utah Geological Survey and U.S. Geological Survey, National Cooperative Geologic Mapping Program, under USGS STATEMAP award number 01HQAG0100. The views and conclusions contained in this document are those of the author and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S Government.
Although this product represents the work of a professional scientist, the Utah Department of Natural Resources, Utah Geological Survey, makes no warranty, expressed or implied, regarding its suitability for a particular use. The Utah Department of Natural Resources, Utah Geological Survey, shall not be liable under any circumstances for any direct, indirect, special, incidental, or consequential damages with respect to claims by users of this product.
R. 2 W. R. 1 W.414000mE413412411410409408407406447 500 METERS
414455 000 METERS412411410409407406405000mE
T. 6 S.
T. 5 S.
4464
4465
4463
4462
4461
4460
4459
4458
4457
4466
4467
4469000mN
4468
2 215 000METERS
T. 6 S.
T. 5 S.
4464
4465
4463
4462
4461
4460
4459
4458
4457000mN
4466
4467
4469
2 225 000METERS
17'30''
112°07'30'' 2'30''5'
112°07'30'' 2‘30”5‘
20'
17'30''
40°15'
40°22'30''
112°00'
112°00'
40°15'
40°22'30''
20'
B
P
X
Qal1
Qaly
Qaf1
Qaf2
Qafy
Qafo
Qaf
Qf
Qfd
Qc
Qco
Qed
Qly
Qlgb,Qlgp
Qlsb,Qlsp
Qlmb,Qlmp
Qll
Qmf
Qmsy
Qmso
Qmt
Qac
Qaco
Qafc
Qmtc
Qla
Qlag
Qel
Ql/Qaf2,Ql/Qafo
Qlgb/Qafo
Qlag/Mgb
IPobp
IPou
IPol
IPobu
IPobl
IPMowc
Mmc
Mgb
Mgbu
Mgbl
Mh
Md
Mg
MDfp
31
30
5 lowerbilliard balllimestone
295(90)
upperbilliard balllimestone
lowerlimestone
320(98)
220(67)
upperlimestone
IPobu
IPobp
IPol
IPou
IPobp
IPobp
4,50
0 (1
,370
)2,
500
(750
)
IPobp
IPobp
IPobl 105-140(32-43)
1,025 (313)IPMowcWest CanyonLimestone
Orthoquartzite; top not exposed--SS61202-8--LM-2
Orthoquartzite--SS61202-7
--LM-1
--SS61202-3
Spherical black chert
Spherical black chert
Chaetetes coral bed
Medial sandstone
Clay pits
Limonite pseudomorphs
Spirifer brachiopods
Platy weathering
White sublithographic limestone
White calcite blebs
Phosphatic chert
Silicified rugose corals
MottledBase not exposed
SY
STE
MA
ND
SE
RIE
S
FM.AND
GROUPSYMBOL LITHOLOGY
THICK-NESSFeet
(Meters)
DE
V.
U.
MI
SS
IS
SI
PP
IA
N
Low
erU
pper
Low
erM
iddl
e
PE
NN
SY
LV
AN
IA
N
Manning CanyonShale
1,121-1,419
(342-433)Mmc
90 (28)
Long TrailShale Mbr.and lowerlimestonememberundiffer-entiated
300(90)
Mgbu
Mgbl
2,100(640)
upperlimestonemember
Mgb
Gre
at B
lue
Lim
esto
ne
Mh 700-750(210-230)
HumbugFormation
Md 700-750(210-230)
DeseretLimestone
Mg 500-650(150-200)
GardisonLimestone
MDfp
Fitchville Formationand
Pinyon PeakLimestone, undivided
300+ (90+)
MEMBERAND
MARKERBED
Oq
ui
rr
h
Gr
ou
p
Bu
tt
er
fi
el
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Pe
ak
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uppe
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nes-
ian
Ato
kan
low
er a
nd m
iddl
e D
esm
oine
sian
Mor
row
an
?
?
4,800
4,650
4,500
4,350
4,200
4,050
3,900
3,750
3,600
3,450
3,300
3,150
3,000
2,850
2,700
2,550
2,400
2,250
2,100
1,950
1,800
1,650
1,500
1,350
1,200
1,050
900
750
600
450
300
150
0
-SS61202-8
-LM-2
-SS61202-7
-LM-1
-SS61202-3
Feet
uppe
r lim
esto
nelo
wer
lim
esto
neup
per b
illia
rd b
all l
imes
tone
low
er b
illia
rd b
all l
imes
tone
trans
ition
zon
etra
nsiti
on z
one
Chaetetes coral bed
WE
ST
C
AN
YO
N
LI
ME
ST
ON
E
BU
TT
ER
FI
EL
D
PE
AK
S
FO
RM
AT
IO
N
Lake MountainMeasured Section
South side of Wiley CanyonSection 27 and 28, T. 6 S., R. 1 W.
MA
NN
IN
GC
AN
YO
NS
HA
LE
0
Surficial deposits
Quaternary tolate Tertiary
basin fill
6,000
5,000
4,000
3,000
2,000
1,000
0
6,000
5,000
4,000
3,000
2,000
1,000
IPobp
IPMowcMmc
Mgb
IPobp
Mh
Md
Mg
Mgb
MhMd
Mg
Md
Mh
Mgb
FeetFeet
Mgb
?
?
?
Pre-Gardison strata
Pre-Gardison strata
Pre-Gardison
strata
2,000
3,000
4,000
5,000
6,000
7,000
8,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
Feet Feet
Mgbu
Mmc
IPMowc
IPobp
Mgbl
MhMd
Mgbl
Mgbu
Mh
Md
Mg
Mg
Md
Mh
Mgbl
MdMg
Quaternary tolate Tertiary
basin fill
Paleozoicundiff.
Mmc
IPMowc
IPobp
IPobp
IPobp
IPobp
IPMowc
IPobp
IPobp
IPobpIPobpIPobpIPobp
IPol
IPouIPol IPobu
IPobu
IPol
IPobpIPou
IPobu
IPobl
IPobl
IPobp
IPobp
IPMowc
Mmc
Mmc
MgbuMgbl
Mh
MdMg
Mg
Md
Mh
Qlsb
Mgbl
Qafo
IPobl
?
?
?
?
?
?
??
?
?
?
MmcMgbuMgbu
5,000
4,000
3,000
2,000
1,000
0
-1,000
Mgb
Mmc
IPobp
IPMowc
Mh
Md
Mg
FeetFeet
5,000
4,000
3,000
2,000
1,000
0
-1,000
Surficialdeposits
Pre-Gardison stratasandstonecalcareoussandstone
limestonechertylimestone
fossiliferouslimestonesandylimestoneshalylimestone
covered
cross-beddedsandstone
Hol
ocen
eP
leis
toce
ne
Qal1 Qaf1
Qaf2
Qafy Qc Qed
QlyQf,Qfd
Qaly
Qafo Qco
Qaf
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?
?
? ?
?
Qlgp
Qlgb Qlsb Qlmb
Qlsp Qlmp
Qll
Qmf
QmsyQmt
Qac Qla Qel
Ql/Qafo
Qlag/Mgb
Qlgb/Qafo
Qlag
QmtcQafc
QacoQmso
Provophase
BonnevillephaseB
onne
ville
lake
cyc
le
QU
AT
ER
NA
RY
Prehistoric
Historic
PE
NN
SY
LVA
NIA
NM
ISS
ISS
IPP
IAN
IPol
IPob
p
IPobu
IPobl
IPou
IPMowc
MMc
Mgbu
MgblMgb
Mh
Md
Mg
MDfplower
upperDE
V.
lower
upper
middle
QUATERNARYAlluvial depositsStream deposits (Holocene) - Moderately
sorted sand, silt, clay, and pebble to bouldergravel deposited in stream channels;equivalent to the upper part of young alluvialdeposits (Qaly); locally includes smallalluvial-fan and colluvial deposits; mappedin ephemeral washes draining the Lake andOquirrh Mountains; 0 to 20 feet (0-6 m)thick.
Young alluvial deposits (Holocene to upperPleistocene) - Moderately sorted sand, silt,clay, and local pebble gravel deposited inriver channels and flood plains; incised byTickville Gulch and West Canyon Wash atnorth end of Lake Mountain, and locallycontains considerable colluvium in the lowerreaches of Tickville Gulch; locally includesloess; probably less than 20 feet (6 m) thick.
Level-1 alluvial-fan deposits (Holocene toupper Pleistocene) - Poorly to moderatelysorted, clay- to boulder-size sedimentdeposited principally by debris flows at themouths of active drainages; upper partstypically characterized by abundant bouldersand debris-flow levies that radiate awayfrom the apex of the fan; equivalent to theyounger part of Qafy, but differentiatedbecause they form smaller, isolated fans;probably less than 20 feet (6 m) thick.
Level-2 alluvial-fan deposits (lowerHolocene to upper Pleistocene) - Poorly tomoderately sorted, clay- to boulder-sizesediment deposited principally by debrisflows; incised by younger undifferentiatedalluvial-fan deposits (Qafy); formsmoderately dissected surfaces north ofCedar Fort; locally truncated by theBonneville shoreline; probably less than 30feet (9 m) thick.
Younger undifferentiated alluvial-fandeposits (Holocene to upper Pleistocene)- Similar to level-1 alluvial-fan deposits(Qaf1), but forms coalesced apron of post-Bonneville sediment shed off the Lake andOquirrh Mountains; upper parts of fans arelocally deeply incised; locally forms apediment-like surface over the ManningCanyon Shale; commonly gradational tomixed alluvial-fan and colluvial deposits(Qafc) on upper parts of fans; includessandy veneer in the Webb Cedars area;thickness unknown, but likely up to severaltens of feet, with deposits north and westof Cedar Valley likely thicker.
Older alluvial-fan deposits (upperPleistocene) - Similar to youngerundifferentiated alluvial-fan deposits (Qafy),but forms deeply dissected alluvial aprontruncated by, and thus predating, theBonneville shoreline; upper parts of fanslocally receive sediment from minor washes;thickness unknown, but likely more thanseveral tens of feet.
Alluvial-fan deposits (upper Pleistocene) -Similar to older alluvial-fan deposits (Qafo),but preserved as very deeply dissectedremnants on the flanks of the southernOquirrh Mountains; upper parts of fanslocally receive sediment from minor washes;includes two older, higher-level deposits,one at the mouth of Israel Canyon and onenorth of Limekiln Canyon; exposedthickness is about 150 feet (45 m) on theflanks of the Oquirrh Mountains.
Artificial depositsArtificial fill (Historical) - Fill used to create
railroad bed in the northwest corner of theSaratoga Springs quadrangle; 0 to 25 feet(0-8 m) thick.
Mine-dump deposits (Historical) - Wasterock and overburden from clay quarries andone calcite quarry. Variable thickness.
Colluvial depositsColluvial deposits (Holocene to upper
Pleistocene) - Poorly to moderately sorted,
Research supported by the Utah Geological Survey and U.S. Geological Survey, National Cooperative Geologic Mapping Program,under USGS STATEMAP award number 01HQAG0100. The views and conclusions contained in this document are those of the authorand should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S Government.
Although this product represents the work of a professional scientist, the Utah Department of Natural Resources, Utah Geological Survey,makes no warranty, expressed or implied, regarding its suitability for a particular use. The Utah Department of Natural Resources,Utah Geological Survey, shall not be liable under any circumstances for any direct, indirect, special, incidental, or consequentialdamages with respect to claims by users of this product.
REFERENCESBaker, A.A., 1964, Geology of the Aspen Grove quadrangle:
U.S. Geological Survey Geologic Quadrangle Map GQ-239, scale 1:24,000.
Brimhall, W.H., Bassett, I.G., and Merritt, L.B., 1976,Reconnaissance study of deep-water springs and strata ofUtah Lake: Provo, Utah, Mountainlands Association ofGovernments, Technical Report 3, 21 p.
Bryant, Bruce, 1992, Geologic and structure maps of the SaltLake City 1° x 2° quadrangle, Utah and Wyoming: U.S.Geological Survey Miscellaneous Investigations Series MapI-1997, 3 plates, scale 1:125,000.
Bullock, K.C., 1951, Geology of Lake Mountain, Utah: UtahGeological and Mineralogical Survey Bulletin 41, 46 p.
Davis, L.E., Webster, G.D., and Dyman, T.S., 1994, Correlationof the West Canyon, Lake Point, and Bannock PeakLimestones (Upper Mississippian to Middle Pennsylvanian),basal formations of the Oquirrh Group, northern Utah andsoutheastern Idaho: U.S. Geological Survey Bulletin 2088,30 p.
Gordon, MacKenzie, Jr., and Duncan, H.M., 1970,Biostratigraphy and correlation of the Oquirrh Group andrelated rocks in the Oquirrh Mountains, Utah, in Tooker,E.W., and Roberts, R.J., Upper Paleozoic rocks in the OquirrhMountains and Bingham mining district, Utah: U.S.Geological Survey Professional Paper 629-A, p. A38-A70.
Gordon, MacKenzie, Jr., Tooker, E.W., and Dutro, J.T., Jr.,2000, Type locality for the Great Blue Limestone in theBingham nappe, Oquirrh Mountains, Utah: U.S. GeologicalSurvey Open-File Report 00-012, 61 p.
CORRELATION OF GEOLOGIC UNITS
angular, clay- to boulder-size, locallyderived sediment deposited by slopewashand soil creep on moderate slopes and inshallow depressions; locally grades upslopeinto talus deposits; 0 to 20 feet (0-6 m)thick.
Older colluvial deposits (upper Pleistocene)- Similar to colluvial deposits (Qc), butinactive remnant caps low spur at the baseof Long Ridge in the southeast corner ofthe Saratoga Springs quadrangle; 0 to 30feet (0-9 m) thick.
Eolian depositsEolian dune sand deposits (Holocene to
upper Pleistocene) - Well- to very well-sorted, fine- to medium-grained, well-rounded quartz sand that forms small dunesmostly stabilized by vegetation; 0 to 5 feet(0-2 m) thick.
Lacustrine depositsYounger lacustrine and marsh deposits
(Holocene) - Silt, clay, and minor fine-grained sand deposited along the margin ofUtah Lake; locally organic rich; probably0 to 10 feet (0-3 m) thick.
Lacustrine gravel and sand (upperPleistocene) - Moderately to well-sorted,moderately to well-rounded, clast-supported, pebble to cobble gravel andlesser pebbly sand; thin to thick bedded;typically interbedded with or laterallygradational to sand and silt facies;gastropods common in sandy lenses; locallypartly cemented with calcium carbonate;Qlgb deposited at and below highestBonneville shoreline but above the Provoshoreline, and Qlgp deposited at and belowthe Provo shoreline; forms beach ridges,terraces, bars, and spits; 0 to 50 feet (0-15m) thick.
Lacustrine sand and silt (upper Pleistocene)- Coarse- to fine-grained lacustrine sandand silt, with minor gravel; typically wellsorted and laminated in thick beds;gastropods locally common; gradesdownslope from sandy nearshore depositsto finer grained offshore deposits; shorelinestypically poorly developed on this facies;Qlsb deposited at and below highestBonneville shoreline but above the Provoshoreline, and Qlsp deposited at and belowthe Provo shoreline; probably less than 30feet (9 m) thick.
Lacustrine silt and clay (upper Pleistocene)- Calcareous silt (marl) with minor clay andfine-grained sand; typically thick bedded;Qlmb deposited below Bonneville shorelinebut above the Provo shoreline in CedarValley, and Qlmp deposited below the Provoshoreline northwest of Utah Lake; contactwith distal parts of younger alluvial-fandeposits is difficult to identify andcommonly based on subtle geomorphicdifferences; thickness unknown.
Lagoon-fill deposits (upper Pleistocene) -Borrow-pit excavations reveal sandylacustrine deposits at base overlain by loessand slopewash deposits composed of verythick-bedded brown silt with minor fine-grained sand and few small pebbles;deposited in a small lagoon behind offshoregravel bar; 0 to 20 feet (0-6 m) thick.
Mass-movement depositsDebris-flow deposits (Holocene) - Very
poorly sorted, subangular, cobble- toboulder-size gravel in a matrix of silt, sand,clay, and pebbles; typically have well-developed levee deposits of angular rubble;mapped on level-1 (Qaf1) and youngerundifferentiated alluvial-fan (Qafy) deposits;fresh morphology and only modestvegetation suggest most are of historicalage; because of indistinct morphology, doesnot include finer-grained, distal portions ofdebris flows present on lower reaches ofalluvial fans; typically less than 10 feet (3m) thick.
Younger landslide deposits (Holocene toupper Pleistocene) - Very poorly sorted,clay- to boulder-size, locally derivedmaterial deposited principally by rotationalslides; characterized by slightly tomoderately subdued hummockytopography; includes three slides derivedfrom the lower Manning Canyon Shale;variable thickness up to about 30 feet (9m).
Older landslide deposits (upper Pleistocene)- Similar to younger landslide deposits(Qmsy), but deeply incised and main scarpsand hummocky topography have beenextensively modified by erosion; includesone slide in the lower Great Blue Limestoneand adjacent alluvial-fan deposits, one inthe lower Manning Canyon Shale, and onein the Butterfield Peaks Formation;thickness highly variable.
Talus deposits (Holocene to upperPleistocene) - Very poorly sorted, angularcobbles and boulders and finer-grainedinterstitial sediment deposited principallyby rock fall on or at the base of steep slopes;
locally grades downslope into colluvialdeposits; generally less than 20 feet (6 m)thick.
Mixed-environment depositsAlluvial and colluvial deposits (Holocene
to upper Pleistocene) - Poorly to moderatelysorted, generally poorly stratified, clay- toboulder-size, locally derived sedimentdeposited in swales, small drainages, andthe upper reaches of larger ephemeralstreams by fluvial, slopewash, and creepprocesses; generally less than 20 feet (6 m)thick.
Older alluvial and colluvial deposits (upperPleistocene) - Similar to mixed alluvial andcolluvial deposits (Qac), but form isolatedremnants deeply incised by adjacentstreams; 0 to 20 feet (0-6 m) thick.
Alluvial-fan and colluvial deposits(Holocene to upper Pleistocene) - Poorlyto moderately sorted, clay- to boulder-sizesediment deposited by debris flows andslopewash in large, partly enclosed basinsat the north end of Lake Mountain; 0 toabout 40 feet (0-12 m) thick.
Talus and colluvium (Holocene to upperPleistocene) - Very poorly sorted, angularto subangular cobbles and boulders andfiner-grained interstitial sediment depositedprincipally by rock fall on steep slopes;grades downslope into colluvial deposits;generally less than 20 feet (6 m) thick.
Lacustrine and alluvial deposits (Holoceneto upper Pleistocene) - Moderately to well-sorted, fine-grained sand, silt, and clayadjacent to the Jordan River; grades intosilt and clay deposits of the BonnevilleLake cycle; includes network ofanastomosing alluvial deposits andlacustrine silt and clay deposits at the sinkseast of Fairfield, which grades upstream toyoung alluvial deposits, and sandy depositsthat grade into young alluvial depositsnorthwest of Lake Mountain; thicknessunknown.
Lacustrine and alluvial coarse-graineddeposits (Holocene to upper Pleistocene)- Poorly to moderately sorted, clay- toboulder-size sediment deposited by debrisflows, river channels, and slopewash, andmoderately to well-sorted, moderately towell-rounded, clast-supported, pebble tocobble gravel and lesser pebbly sand;mapped where it is impractical todifferentiate alluvial-fan, alluvial, colluvial,and nearshore lacustrine deposits; mostareas probably represent pre-Bonnevillealluvial and alluvial-fan sediments reworkedby Lake Bonneville; 0 to about 60 feet (0-18 m) thick.
Eolian dune sand and lacustrine deposits(Holocene to upper Pleistocene) - Well- tovery well sorted, fine- to medium-grained,well-rounded sand that forms small, isolateddunes mostly stabilized by vegetation; lowareas between dunes are calcareous silt(marl) with minor clay and fine-grainedsand; dune sand is about 0-5 feet (0-2 m)thick, but thickness of lacustrine sedimentsis unknown.
Stacked-unit depositsLacustrine deposits over older alluvial-fan
deposits (upper Pleistocene) - Olderalluvial-fan deposits planated by waveaction and partly concealed by adiscontinuous veneer of lacustrine deposits;where lacustrine deposits not present, fansurface commonly covered by a lag ofangular to subangular boulders; closelyspaced, well-preserved strandlines arecommon on the upper parts of the fans, butare less well developed lower on the fanswhere lacustrine deposits tend to be finergrained and thicker.
Mixed alluvial and lacustrine graveldeposits over older alluvial-fan deposits(upper Pleistocene) - Older alluvial-fandeposits overlain by moderately to well-sorted, moderately to well-rounded, clast-supported, pebble to cobble gravel probablydeposited as a gravel spit on the northwestside of Lake Mountain south of WebbCedars; truncated on north by youngerundifferentiated alluvial-fan deposits; aconspicuous scarp, probably of depositionalorigin, forms west side of deposit.
Lacustrine and alluvial deposits over GreatBlue Limestone (Pleistocene/UpperMississippian) - Mapped in the low hillnorth of Tickville Gulch that is cored bythe Great Blue Limestone; closely spaced,well-preserved strandlines (wave-cutterraces) are present on this hill, butlacustrine sand and gravel forms onlyisolated deposits, which are mappedseparately; surficial deposits (Qlag) arepoorly sorted, subangular to subroundedcobbles and boulders of orthoquartzite andminor limestone that appear similar to wave-washed alluvial-fan deposits; minormoderately to well-sorted, moderately towell-rounded, pebble to cobble gravel forms
Morris, H.T., and Lovering, T.S., 1961, Stratigraphy of theEast Tintic Mountains, Utah: U.S. Geological SurveyProfessional Paper 361, 145 p.
Sandberg, C.A., and Gutschick, R.C., 1984, Distribution,microfauna, and source-rock potential of Mississippian DellePhosphatic Member of Woodman Formation and equivalents,Utah and adjacent states, in Woodward, Jane, Meissner, F.F.,and Clayton, J.L., editors, Hydrocarbon source rocks of thegreater Rocky Mountain region: Rocky MountainAssociation of Geologists Field Conference Guidebook, p.135-178.
Tooker, E.W., and Roberts, R.J., 1970, Upper Paleozoic rocksin the Oquirrh Mountains and Bingham mining district,Utah, with a section on biostratigraphy and correlation byMacKenzie, Gordon, Jr., and Duncan, H.M.: U.S. GeologicalSurvey Professional Paper 629-A, 76 p.
ACKNOWLEDGMENTSI thank Scott Ritter, Brigham Young University, for his technicalreview of the maps and accompanying materials, and foridentifying conodonts in the Butterfield Peaks Formation atLake Mountain. Scott also collected additional samples atLake Mountain, including LM-1 and LM-2. I thank GrantWillis and Mike Hylland, Utah Geological Survey (UGS), fortheir careful review of the maps and accompanying materials;Sandy Eldredge, Hugh Hurlow, Barry Solomon, and BryceTripp, each with the UGS, also reviewed parts of this report.Finally, I thank Adam Davison, University of Utah studentintern sponsored by the Association of American StateGeologists, for help measuring the Oquirrh Group at LakeMountain.
MAP SYMBOLS
Contact, dashed where approximately located, queriedwhere uncertain
Normal fault, dashed where approximately located, dottedwhere concealed, dotted and queried where inferred; barand ball on down-dropped side
Normal fault, concealed; bar and ball on down-droppedside; located by geophysical methods (Brimhall andothers, 1976)
Normal fault, concealed; inferred principally from gravitydata (Bryant, 1992); very approximately located; bar andball on down-dropped side
Thrust or reverse fault, dashed where approximately located,dotted where concealed; saw teeth on upper plate
Tear fault, dashed where approximately located, dottedwhere concealed; arrows show direction of relative offset
Axial trace of anticline, dashed where approximately located,dotted where concealed; arrow shows direction of plunge
Axial trace of syncline, dashed where approximately located,dotted where concealed; arrow shows direction of plunge
Lake Bonneville shorelines; major shorelines of theBonneville lake cycle. Mapped at the top of the wave-cut platform, dashed where approximately located
Highest shoreline of the Bonneville (transgressive) phase
Highest shoreline of the Provo (regressive) phase
Other transgressive shorelines of the Bonneville phase(present above the Provo shoreline) and mostlyregressive shorelines of the Provo phase (present belowthe Provo shoreline)
Location of measured sections
Strike and dip of inclined bedding
Approximate strike and dip of inclined bedding
Approximate strike and dip direction of inclined bedding
Strike of vertical bedding
Horizontal bedding
Sand and gravel pit
Quarry, cl = clay, no letter = crushed rock
Prospect, cl = clay, c = calcite, no letter = metals
Prospect trench, c = calcite, no letter = metals
Adit
Petroleum exploration well, plugged and abandoned
Spring
Sample location and number
a discontinuous veneer on wave-cutbenches; most of the mapped exposures ofGreat Blue are limestone, so thepreponderance of orthoquartzite bouldersis puzzling - these deposits probablyrepresent the remnants of old alluvial-fandeposits, possibly even of late Tertiary age,partly reworked by Lake Bonneville;thickness uncertain, but surficial depositsmay locally exceed 60 feet (18 m) thick.
unconformityPENNSYLVANIAN and MISSISSIPPIANOquirrh Group (Upper Pennsylvanian to
Upper Mississippian) - Principallycalcareous sandstone, sandy limestone,limestone, and minor orthoquartzite thatform the bulk of Lake Mountain and partof the southern Oquirrh Mountains; dividedinto, in ascending order, the West CanyonLimestone and Butterfield Peaks Formation;believed to be part of the Bingham sequenceof Tooker and Roberts (1970); best exposedalong or just below ridge crests – elsewhere,slopes are commonly covered by a veneerof colluvium and talus not practical to mapat a scale of 1:24,000; ages from Gordonand Duncan (1970) and Davis and others(1994); only the lower 4,850 to about 5,500feet (1,480-1,675 m) is preserved in theLake Mountain syncline, but the group isin excess of 17,800 feet (5,425 m) thick inthe Oquirrh Mountains (Tooker and Roberts,1970) and about 25,000 feet (7,600 m) thicknear Mt. Timpanogos (Baker, 1964).
Butterfield Peaks Formation (Middle –Lower Pennsylvanian [Desmoinesian –Morrowan]) - Interbedded, brown-weathering, fine-grained calcareoussandstone, medium-gray, fine-grained sandylimestone, minor orthoquartzite, and severallimestone intervals, four of which aremapped separately; typically cyclicallyinterbedded with several tens of feet ofcalcareous sandstone capped by graylimestone several feet thick; contains minorsiltstone and mudstone interbeds that arevery poorly exposed; forms ledgy to cliffyslopes. Calcareous sandstone is typicallymedium to thick bedded, light brownishgray to medium gray but grayish orange tobrown weathering, very fine to fine grained,locally with planar, low-angle, and ripplecross-stratification and bioturbation;sandstone is commonly non-calcareous onweathered surfaces and so appears similarto orthoquartzite, but fresh surfaces areinvariably calcareous. Orthoquartzite isgrayish orange pink to light brown, verythick bedded, very fine to fine grained, withfaint low-angle cross-stratification and aprominent conchoidal fracture; it is restrictedto a prominent, 35-foot-thick (11 m) ledgebetween the “upper” and “lower” limestonesand a few thinner beds above the “upper”limestone. Clastic intervals may thickenfrom west to east. Unmapped limestoneintervals are typically medium gray, mediumto thick bedded, locally with fine-grainedsand, locally fossiliferous with syringoporidand rugose corals, bryozoans, brachiopods,and fossil hash, locally with irregularlyshaped black chert nodules and ribbon chert,and commonly grade upward to finergrained, platy weathering limestone andargillaceous limestone; Chaetetes coral bedis about 325 feet (100 m) above the baseof the formation. Measured section is 3,823feet (1,166 m) thick, but the formation isup to 4,500 feet (1,370 m) thick in theSaratoga Springs quadrangle; Tooker andRoberts (1970) reported the formation is9,070 feet (2,765 m) thick in the OquirrhMountains.
Upper limestone of Butterfield PeaksFormation - Thin- to medium-bedded,medium-gray, fine-grained limestone andvery fine to fine-grained sandy limestonewith minor, brown-weathering, irregularlyshaped black chert nodules; contains minororthoquartzite at north end of LakeMountain; forms ledgy slopes at the top ofLake Mountain; contains uncommoncrinoid, brachiopod, bryozoan, and fusulinidfossils; sample LM-2 yielded abundantIdiognathodus expansus conodonts (middleto upper Desmoinesian) and sampleSS61202-8 yielded sparse juvenileIdiognathodus sp. conodonts and abundantBeedeina sp. fusilinids (upperDesmoinesian); about 220 feet (67 m) thick.
Lower limestone of Butterfield PeaksFormation - Thin- to medium-bedded,platy weathering, light- to medium-gray,fine-grained limestone with common,irregularly shaped black chert nodules;lower part contains minor spherical blackchert nodules; upper part is typicallymedium to thick bedded, coarser grained,has less chert, and contains crinoid,bryozoan, and brachiopod fossils; formsslopes; sample LM-1 yielded sparseIdiognathodus expansus conodonts (middleto upper Desmoinesian) and abundant
Beedeina sp. fusilinids (upperDesmoinesian), and sample SS61202-7yielded sparse Idiognathodus expansusconodonts; about 320 feet (98 m) thick.
Upper billiard ball limestone of ButterfieldPeaks Formation - Light-gray-weathering,medium-dark-gray, thin-bedded, fine-grained limestone with characteristic blackspherical chert 0.25 to 2 inches (0.5-5 cm)in diameter in the lower two-thirds of theunit; upper part typically medium- to thick-bedded, medium- to coarse-grainedlimestone and fine-grained sandy limestonewith common, irregularly shaped blackchert nodules, and, in the upper 10 feet (3m), brachiopod and crinoid fossils and fossilhash; forms slopes and saddles from about2,600 feet (800 m) (west flank) to 3,200feet (975 m) (east flank) above the base ofthe formation; sample SS61202-3 yieldedIdiognathodus expansus conodonts (middleto upper Desmoinesian); 295 feet (90 m)thick.
Lower billiard ball limestone of ButterfieldPeaks Formation - Divisible into two partsnot mapped separately: lower half has aledge-forming basal bed several feet thickof medium-dark-gray, medium- to coarse-grained fossiliferous limestone with crinoidfossils and fossil hash overlain by thin- tomedium-bedded, laminated and platyweathering, fine-grained limestone andargillaceous limestone with typicallyabundant black spherical chert nodules 0.25to 2 inches (0.5-5 cm) in diameter; upperhalf tends to be light- to medium-gray,medium- to thick-bedded limestone withplanar and low-angle cross-stratificationand uncommon irregularly shaped blackchert nodules; forms slopes and saddlesfrom about 1,400 feet (430 m) (west flank)to 1,800 feet (550 m) (east flank) above thebase of the formation; 105 to 140 feet (32-43 m) thick.
West Canyon Limestone (LowerPennsylvanian [Morrowan] to UpperMississippian) - Medium-light-gray tomedium-gray, thick- to very thick bedded,fine- to medium-grained limestone andfossiliferous limestone; locally thin- tomedium-bedded and laminated, and locallywith brown-weathering silt and very finegrained sand laminae; macrofossils includecrinoid columnals, brachiopods, bryozoans,and rugose corals; lower part forms ledgesand slopes, upper part contains threeprominent cliff-forming limestone bedswith brown- to black-weathering irregularlyshaped chert nodules and irregular bedsthat impart a slight “black banded”appearance, especially to the upper cliff;18- to 25-foot-thick (5.5-7.5 m) cliff-forming, light-brown- to grayish-orange-pink-weathering, light-olive-gray to olive-gray, very thick bedded, fine-grainedcalcareous sandstone with planar and low-angle cross-stratification is present nearmiddle of formation; upper and lowercontacts are gradational and conformable;upper and lower parts correspond to slope-forming intervals 182 feet (55 m) and 145feet (44 m) thick, respectively, that containinterbedded calcareous sandstone,limestone, and minor shale or mudstone;1,025 feet (313 m) thick.
MISSISSIPPIANManning Canyon Shale (Upper
Mississippian) - Lithologically diverse,interbedded, black to grayish purple,calcareous and carbonaceous shale andsiltstone; light-brown to pale-yellow-brown,very fine to fine-grained calcareoussandstone with planar and low-angle cross-stratification; brown-weathering, thick-bedded, fine-grained orthoquartzite with avitreous and scintillating luster; andmedium-gray to bluish-gray, thin- to thick-bedded fossiliferous limestone andargillaceous limestone; fossils includebrachiopods, bryozoans, rare trilobites, andleaves; slopes and soils developed onManning Canyon strata tend to have slightreddish-brown to lavender hues in contrastto the browns and grays of enclosing units;upper contact is conformable andgradational and corresponds to a changefrom predominantly clastic to predominantlycarbonate strata; age from Gordon andDuncan (1970); Bullock (1951) reportedthicknesses of 1,121 (west) and 1,419 (east)feet (342-433 m) at Lake Mountain.
Great Blue Limestone, undivided (UpperMississippian) - Undivided in the north-central part of Saratoga Springs quadrangledue to inadequate exposure; age fromGordon and others (2000); thicknessuncertain due to thrust faults, but regionallythe formation is about 2,500 feet (750 m)thick (Gordon and others, 2000).
Upper limestone member - Medium- to verythick bedded, bluish-gray limestone, locallycherty and fossiliferous with brachiopods,corals, and bryozoans; contains interbedded
shales in lower part; typically forms ledgesand cliffs; upper contact marks a prominentchange from cliff-forming limestone toslope-forming shale; estimated to be about2,100 feet (640 m) thick.
Long Trail Shale Member and lowerlimestone member, undivided - LongTrail Shale Member is interbedded,reddish-brown, dark-gray, and grayish-purple calcareous and locally carbonaceousshale, and thin-bedded, medium-graylimestone and fossiliferous limestone;locally abundant rugose corals, pelecypods,brachiopods, and bryozoans; weathers toform strike valleys and saddles; commonlycontains limonite pseudomorphs after pyrite;neither lower or upper contact of Long TrailShale Member is exposed, but regionallythey appear conformable and gradational;90 feet (28 m) thick (Bullock, 1951). Lowerlimestone member is medium- to verythick bedded, light- to dark-gray buttypically medium-gray limestone andfossiliferous limestone; upper part istypically thin-bedded and platy weatheringargillaceous limestone and interbedded grayto grayish-purple shale; bryozoans arelocally abundant; about 300 feet (90 m)thick.
Humbug Formation (Upper Mississippian)- Interbedded calcareous quartz sandstone,orthoquartzite, and limestone that weatherto ledgy slopes. Sandstone is light- to dark-brown weathering, pale yellowish brownto olive gray, medium to very thick bedded,variably calcareous or siliceous, locallywith planar or low-angle cross-stratification. Limestone rarely contains dark-gray chertnodules and is: (1) light gray weathering,medium dark gray, medium to thick bedded,and fine grained with local small whitechert blebs; (2) dark gray, very thick beddedwith small white calcite blebs; or (3) locallymedium to coarse grained with sparse fossilhash. Upper half contains severaldistinctive, ledge-forming, white to light-gray, medium- to thick-beddedsublithographic limestone beds up to 10feet (3 m) thick; contains intraformational,pebbly, quartzitic conglomerate bed in thePelican Hills; upper contact is conformableand gradational and represents a changefrom interbedded sandstone and limestoneto limestone; age from Morris and Lovering(1961); about 700 to 750 feet (210-230 m)thick.
Deseret Limestone (Upper to LowerMississippian) - Medium- to very thickbedded, medium-dark-gray, variably sandyand fossiliferous limestone; containsdistinctive white calcite nodules and blebsand local brown-weathering chert nodules;fossils include rugose corals, uncommonbrachiopods, crinoids, bryozoans, and fossilhash; lower 20 to 30 feet (6-9 m) is markedby slope-forming, thin-bedded, blackphosphatic chert likely of the DellPhosphatic Member; upper contact isconformable and gradational andcorresponds to a change from fossiliferouslimestone to predominantly sandstone; agefrom Morris and Lovering (1961) andSandberg and Gutschick (1984); about 700to 750 feet (210-230 m) thick.
Gardison Limestone (Lower Mississippian)- Medium- to very thick bedded, medium-gray to medium-dark-gray limestone, chertylimestone, and fossiliferous limestone;contains minor medium-dark-gray, medium- to thick-bedded dolomite near the base;chert is present as black, irregularly shapednodules and thin, discontinuous beds; fossilsinclude rugose and colonial corals,brachiopods, gastropods, and bryozoansreplaced by white calcite; upper contactappears conformable and gradational andgenerally corresponds to a break in slope,with slope-forming, thinner bedded, chertylimestone below and thicker bedded, ledge- and cliff-forming limestone above; agefrom Morris and Lovering (1961); thicknessuncertain due to structural complications,but probably about 500 to 650 feet (150-200 m) thick.
MISSISSIPPIAN and DEVONIANFitchville Formation (Lower Mississippian
and Upper Devonian) and Pinyon PeakLimestone (Upper Devonian), undivided- Light- to medium-gray, medium- to verythick bedded, medium- to coarse-graineddolomite, sandy dolomite, and uncommoncherty dolomite; middle part is mottled lightand dark gray and upper part is especiallyfossiliferous; chert is light brown to palered; fossils include rugose and syringoporidcorals, brachiopods, and crinoids; uppercontact marks a slight color change fromlight-gray dolomite with abundant silicifiedrugose corals below to darker gray dolomiteand limestone above; age from Morris andLovering (1961); incomplete section isabout 300 feet (90 m) thick; Pinyon PeakLimestone may not be present.
DESCRIPTION OF GEOLOGIC UNITS
1 = SS61202-82 = LM-2
3 = SS61202-74 = LM-1
5 = SS61202-3
ExplanationUtah Geological Survey Maps 201 and 202
Geologic Maps of the Saratoga Springs (201) and Cedar Fort (202) 7.5' Quadrangles
UTAH GEOLOGICAL SURVEYa division of theUTAH DEPARTMENT OF NATURAL RESOURCESSTATEMAP Agreement No. 01HQAG0100
A SOUTHWEST A' NORTHEAST A"
TickvilleGulch
BeverlyHills
LakeMountains
Some surficial deposits not shown.
Fauna
sparse juvenileIdiognathodussp., abundantBeedeina sp.
abundantIdiognathodusexpansus
sparseIdiognathodusexpansus
sparseIdiognathodusexpansus,Beedeina sp.
Idiognathodusexpansus,sparseBeedeina sp.
Rock Type
fusulinidpackstone
crinoidalpackstone
bimodalpackstone
skeletalpackstone
skeletalpackstone
Interval
Upperlimestone
Upperlimestone
Lowerlimestone
Lowerlimestone
Upperbilliard-balllimestone
Sample No.
SS61202-8
LM-2
SS61202-7
LM-1
SS61202-3
Age
upper Des-moinesian
middle toupper Des-moinesian
middle toupper Des-moinesian
middle toupper Des-moinesian
middle Des-moinesian
C WEST EAST C'L a k e M o u n t a i n s
C a s t l e V a l l e y H i l l s
C e d a r V a l l e yP e l i c a n H i l l s
B SOUTHWEST NORTHEAST B'Tickville
GulchExplanation of Lake Mountain Measured Section
Some surficial deposits not shown.
Some surficial deposits not shown.
Cedar Fort 7.5' quadrangle Saratoga Springs 7.5' quadrangle