elb - usgs · [for detailed descriptions, thickness, and references, see full-length...
TRANSCRIPT
5 50 20 25 30 KILOMETERS
SCALE 1: 250 0005 0 5 20 MILES
LIST OF MAP UNITS
HOLOCENE
afa Alluvial-fan deposit
cac
cacb Bouldery phase of arkosic loamy colluvium
cgh Arkose-clast loamy colluvium
xch Clayey, calcareous disintegration residuum
HOLOCENE AND LATE PLEISTOCENE
dba Crystal l ine-clast deposits
asaAlluvial sand, si l t , clay, and gravel (post-Piney Creek al luvium,
Piney Creek Alluvium, and pre-Piney Creek al luvium of Hunt, 1954, and Scott, 1960; Broadway Alluvium)
es Eolian sand
ed Stabil ized dune sand
jea Slump-block, earthflow, and mudflow landsl ide deposits
ccd Calcareous clayey colluvium
ccm Andesit ic clayey colluvium
caa Andesit ic loamy colluvium and sheetwash al luvium
clx
csk Grus, crystal l ine-clast col luvium, rock outcrop, and al luvium
csm Tuffaceous col luvium
cgc Gneiss- and granite-clast gravel ly col luvium
cbh Blocky sedimentary-rock colluvium
cbm Carbonate-clast loamy colluvium
cbs Rhyolite- and andesite-clast col luvium
cbu Mixed-l i thology blocky colluvium
xlu Feldspathic loamy disintegration residuum
xlv Loamy disintegration residuum, eolian sand, and sheetwash al luvium
xsa Feldspathic quartz-sand disintegration residuum
xgb Latite-clast disintegration residuum
HOLOCENE TO MIDDLE PLEISTOCENEQUATERNARY
PLEISTOCENE
LATE PLEISTOCENE
LATE AND MIDDLE PLEISTOCENE
MIDDLE AND EARLY PLEISTOCENE
EARLY PLEISTOCENE AND PLIOCENE?
PRE-QUATERNARY
tbj Mixed-l i thology-clast bouldery t i l l
jbc Bouldery crystal l ine-rock landsl ide deposit
xsg Feldspathic quartz-sand disintegration residuum
cra Hogback and rangefront col luvium, al luvium, and rock outcrop complex
elb Loess (Peoria Formation)
ggq Outwash sand and gravel (outwash of Bull Lake, Pinedale, and post-Pinedale ages)
pga Pediment gravel
ags Alluvial sand, si l t , clay and gravel (Louviers and Slocum Alluviums, undivided;late middle Pleistocene)
tbk Bouldery t i l l ( t i l l of pre-Bull Lake glaciations)
gge Outwash sand and gravel (outwash of pre-Bull Lake glaciations)
agm Alluvial gravel and sand (Verdos and Rocky Flats Alluviums, undivided;early middle Pleistocene and early Pleistocene)
QTdd Diamicton
R Bedrock
[For detai led descr ipt ions, thickness, and references, see fu l l - length "Descr ipt ion of Map Units" in accompanying pamphlet ]
Disintegrated deposits and periglacial deposits, bouldery t i l l , and rock outcrop
Mixed-l i thology-clast deposits dbd
Crystal l ine-clast bouldery t i l ltbg
Bouldery t i l l ( t i l l of Pinedale and Bull Lake glaciations)
Arkosic loamy colluvium and sheetwash al luvium
Clay loam colluvium
xch
xgbxsaxlvxlu
xsg
cra
cbucbscbmcbhcgccsmcskclxcaaccmccd cgh
cacbcac
jea
afa
asa
agm
QTdd
R
COLLUVIUM,ALLUVIUM,
ANDROCK OUTCROP
DISINTEGRATIONRESIDUAL DEPOSITSDEPOSITSCOLLUVIAL
LANDSLIDEDEPOSITS
EOLIANDEPOSITS
ALLUVIALDEPOSITS
GLACIAL, PERIGLACIAL,
DISINTEGRATEDDEPOSITS, ANDROCK OUTCROP
DIAMICTON
latePleistocene
middlePleistocene
earlyPleistocene
Pliocene
Holocene
BEDROCK
ed
CORRELATION OF MAP UNITS
dbddba
tbg tbj
tbk
es
pga
ags
elb
jbc
?
QUATERNARY
PRE-QUATERNARY
ggq
gge
csm
cbu
tbg
dba
gge
csk
csm
tbk
tbg
dba
tbg
dba
dba
dba
dba
csk
csk
dba
csk
csk
csk
dba
dba
dba
csk
csk
dba
dba
tbg
dba
tbj
dba
cbh
tbj
csm
csmcbh
gge
ggq
xch
gge
tbk
gge
ggq
asa
ggq
gge
cbs
asaggq
pga
cgh
cghags asa
xlu
ags
agm
asa
xsg
cac cac
asa
es
es
xlu
cac
clx
asa
asa
asaags
es
es
es
asaxlu
elb
elb
agm
cac
xlu
elb
ags
agm
cra
elb
ags
cac
elb
es
elb
agsxlu
elb
xsa
es
es
xlu
ags
elb
ed
asa
ed
agm
cra
xgb
xgbelb
ags
ags
ags
ccm
agselb
ags
asa
asa
asa
asa
elb
dba
csk
csk
es
es
asa
ags
xlu
cbh
ccd
cac
asa
xlu
xsa
asa
asa
es
elb
cac
asa
cac
clx
cacxsa
xsa
csm
csk
csk
csk
csk
asa
clx
ags
asa
es
elb
elb
asa
ags
elb
es
es
es
ags
caa
cgc
elb
asa
xlu
es
agm
asa
asa
asa
w
cbu
ccm
agm
ags
ags
ags
cac
xlu
elb
xlu
es
elb
jea
tbg
csm
ggq
tbg
jbc
asa
afa
jea
asa
ggq
asa
jbc
asa
asa
asa
jbc
jbc
asa
cgc
cgc
asa
jea
asa
cac
cac
asa
elb
w
elb
asa
asa
cac
cac
asa
asa
elb
ags
elb
es
elb
asa
ags
asa
ags
xlu
asaags
w
w
asa
asa
elbcra
agmw
jea
cac
asa
elb
w
xsg
cra
agm
ccd
csk
es
asa
asa
asa
cgc
elb
es
csk
csk
asa
asa
es
asa
cac
agm
cgc
cbh
cbs
csk
dba
cgc
jea
cbm
cbm
w
cac
ggq
jbcjbc
jbc
jbc
jbc
jbc
dba
tbk
cbu
QTdd
ags
cacb
cacb
cacb
cac
cacbcacb
cbh
csk
cacb
cacb
cacb
xsa
xlu
cac
cac
xlu
jea
gge
gge
w
w
elb
clx
clx
asa
xsa
cac
xlv
clx
clx
cgc
cgc
cgc
cgc
cacb
cac
cra
ags
ags
caa
agm
jbc
jbc
ags
agm
ccd
agm
ccd
agm
asa
agm
ags
cacb
agm
w
w
w
tbg
tbgtbg
tbg
tbg
tbg
dba
dbatbg
tbg
tbg
csk
tbg
tbg
tbk
dba
dba
tbg
tbg
jbc tbg
tbg
tbg
dba
ggq
jbc
tbg
tbg
dba
tbg
jbc
dba
tbg
tbg
dbd
cbu
tbg
R
R
R
R
R
R
R
R
R
RR
R
R
R
R
R
ags
agm
ags
ccd
asa
R
R
R
R
R
R
R
R
R
R
R
clx
R
ags
ags
asa
R
ccd
ags
cacb
ags
ags
elb
ags
cacb
R
R
R
R
cacb
clx
elb
dba
R
R
dba
R
jea
cbs
asa
clx
cra
agm
jea
es
elb
jea
w
csk
csk
csk
cgc
es
cac
elb
cbu
cgc
w
w
CONTOUR INTERVAL 200 FEETWITH SUPPLEMENTARY CONTOURS AT 100 FOOT INTERVALS
1978 MAGNETIC DECLINATION FROM TRUE NORTH VARIES FROM 18 (230 MILS) EASTERLY FOR THECENTER OF THE WEST EDGE TO 12 (210 MILS) EASTERLY FOR THE CENTER OF THE EAST EDGE
U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY
GENERALIZED SURFICIAL GEOLOGIC MAP OF THE DENVER 1º x 2º QUADRANGLE, COLORADOCompiled by
David W. Moore, Arthur W. Straub, Margaret E. Berry, Michael L. Baker, and Theodore R. Brandt2001
Any use of trade names in this publication is fordescriptive purposes only and does not imply endorsement by the U.S. Government.
For sale by U.S. Geological Survey InformationServices, Box 25286, Federal Center, Denver, CO 80225
This map was produced on request, directly fromdigital f i les, on an electronic plotter. I t is also avai lable as a PDF fi le at http://greenwood.cr.usgs.gov
MISCELLANEOUS FIELD STUDIES MAP MF-2347Version 1.0
Pamphlet accompanies map
Compiled during 1997-1999D.W. Moore, CoordinatorDigital Cartography by T. R. Brandtand M.L. Baker
Base from U.S. Geological Survey, 1953 (revised 1978)
Transverse Mercator Projection
100,000-foot grids based on Colorado Coordinate System,central and north zones
Black numbered lines indicate the 10,000-meter UniversalTransverse Mercator grid, zone 13
Contact
Open waterw
High-angle reverse fault, Quaternary age--Inferred,R on upthrown block
R
R
R
ARIZONANEW MEXICO
UTAH
STERLINGI-1092
LAMARI-944
LA JUNTA
I-560
TRINIDADI-558
SALINAI-591
SHIPROCK
I-345
GALLUPI-981
ESCALANTE
I-744CORTEZ
I-629
MOABI-360
GRANDJUNCTION
I-736
MONTROSEMF-761
DURANGOI-764
LEADVILLEI-999
COLORADO
RIVER
PHOENIX
SALT LAKECITY
SANTA FE
PUEBLO
I-1022
ARKANSASRIVER
RIO
GR
AN
DE
GR
EEN
RIVER CRAIGI-972
LIMONI-1250
I-1163
DENVER
COLORADO
AZTECI-1730
MARBLECANYON
I-1003
FLAGSTAFFI-1446
GREELEYOF 78-532VERNAL
I-1526
RICHFIELDI-1901
PRICEI-2462
SALT LAKECITYI-1997
116˚ 114˚ 112˚ 110 ˚ 108˚ 106˚ 104˚ 102˚
42˚
40˚
38˚
36˚
34˚
32˚
0 100 200 MILES
0 100 200 KILOMETERS
INDEX MAP SHOWING AREA OF DENVER QUADRANGLEAND OTHER PUBLISHED GEOLOGIC MAPS