niagara escarpment a (west) (east) a' · niagara escarpment drg-1/2 (t0011582/t0011583) bruce...
TRANSCRIPT
FIGURE 3.3 - Regional Geological Cross-Section of the Eastern Flank of the Michigan Basin
PROJECT No: 10-214-11
Prepared by: NMP/VMS
Reviewed by: KGR
Date: 01/20/2015NWMO Phase 1 Geoscientific Desktop Preliminary Assessment Study - Central Huron
Data Source: after NWMO, 2011
Precambrian
Upper Cambrian
Upper OrdovicianLimestone
Trenton GroupBlack River Group
Queenston Fm; Georgian Bay - Blue Mountain Fm
Amabel-Lockport Fm; Fossil Hill Fm; Cabot Head Fm; Manitoulin Fm
Bass Islands FmSalina Group, Guelph Fm
Bois Blanc Fm
sand and gravel;clayey to sandy silt
dolostone
Dominant Lithology
dolostone
argillaceous dolostone;evaporite; dolostone;shale
dolostone; shale
shale; minor limestone or clastic interbeds
argillaceous limestone
silty sandstone;sandy dolostone
granitic gneiss
Cambrian
Lucas FmAmherstburg Fm
Upper OrdovicianShale
Lower Silurian
Upper Silurian
Lower Devonian
Middle Devonian
Quaternary
(50x vertical exaggeration)
A (West) (East) A'
20 km
(horizontal scale)-1200
-1100
-1000
-900
-800
-700
-600
-500
-400
-300
-200
-100
0
100
200
300
400
“P:\Projects\2010\10-214 NWMO APM Site Screening\10-214-11 Central Huron\50 Reporting and Deliverables\Figures\Working Files\10-214-11-110_CentralHuron_Fig3_3_Cross_Section_EasternFlankMichiganBasin.cdr"
Niagara Escarpment
DRG-1/2 (T0011582/T0011583)Bruce Nuclear
Site(borehole offset 1km north from section line)
FIGURE 3.4 - Structural Geology of Southern Ontario: a – Phanerozoic Tectonic Cycles; b –Tectonic Boundaries and Fault Contacts
Prepared by: VMS/ADG
Reviewed by: KGR/SNS
Date: 14/03/2015
a. Phanerozoic Tectonic Cycles
Data Source: Sanford et al. (1985).
b. Tectonic Boundaries and Fault Contacts.
Data Source: Contacts are based on field mapping and interpretations aided by subsurface drilling, boreholestratigraphic correlation, and aeromagnetic and gravity imaging (Liberty and Bolton (1971), and compiledfrom Brigham (1971), Bailey and Cochrane (1984a), Bailey and Cochrane (1984b), Sanford et al. (1985),Carter and Easton (1990), Sage (1991), Jacobi and Fountain (1993), Easton and Carter (1995), Carter et al.(1996), Wallach et al. (1998), Ketchum and Davidson (2000), Boyce and Morris (2002)
NWMO Phase 1 Geoscientific Desktop Preliminary Assessment Study - Central Huron
PASSIVE P
HASE
PASSIVE PHASE
Bmb = Bruce MegablockNmb = Niagara Megablock
“P:\Projects\2010\10-214 NWMO APM Site Screening\10-214-11 Central Huron\50 Reporting and Deliverables\Figures\Working Files\10-214-11-110_CentralHuron_Fig3_5_Tectonics.cdr"
!(3
!(3
!(400
!(9
!(4
!(403
!(89
!(7
!(40
!(21
!(8
!(35
!(402
!(118
!(28
!(7&8
!(401
!(23
!(24
!(QEW
!(401
!(115
!(11
!(69
!(10
!(QEW!(401
!(6
!(6
!(6
!(21
Brant
LondonSarnia
Guelph
Barrie
Oshawa
Windsor
Welland
Toronto
Vaughan
Orillia
Waterloo
Brampton
Hamilton
Kitchener
Woodstock
Stratford
Pickering
Owen Sound
St. Thomas
Burlington
Mississauga
Chatham-Kent
Peterborough
Port Colborne
Lambton Shores
Norfolk County
St. Catharines
Kawartha Lakes
Haldimand County
Thorold
Cambridge
BrantfordNiagara Falls
CanadaUSAMUNICIPALITY
OF CENTRAL HURON
Line A002800018
Line A
0028
0002
0
Line 725937
Line 825938
Lake Huron
Lake Erie
Georgian Bay
Lake Ontario
Lake Simcoe
Lake St. Clair
New York
Michigan
Pennsylvania
300000
300000
400000
400000
500000
500000
600000
600000
700000
700000
4700
000
4700
000
4800
000
4800
000
4900
000
4900
000
5000
000
5000
000
0 20 40 60 8010Kilometres
DESIGN: ADGCAD/GIS: VMS/ADGCHECK: KGRREV: 0
Karst Mapping of Southern Ontario
PROJECT No. 10-214-11
Phase 1 Geoscientific Desktop Preliminary Assessment Study - Central Huron
DATE: 4/14/2015
G:\D
ata\
Proj
ect\S
edim
enta
ry_S
ite_N
WMO
\10-
214-
11_C
entra
lHur
on\C
entra
lHur
on_M
aps\
Cent
ralH
uron
_Suit
abilit
yRep
ort_
Maps
\10-
214-
11-1
10_C
entra
lHur
on_F
ig3_5
_Kar
stMap
pingR
egion
al.m
xd
1:1,500,000SCALE
TITLE
FIGURE3.5
LEGEND
COORDINATE SYSTEM: UTM NAD83 Zone 17NSOURCE:Basemap Layers: LIO, MNR, ESRIGeology: Brunton and Dodge, 2008, Karst of Southern Ontario and Manitoulin Island, OGS Dataset GRS005Produced by Geofirma Engineering Ltd under license from Ontario Ministry of Natural Resources, ©Queens Printer 2011
Lake Huron
Lake Erie
Lake Ontario
Georgian Bay
LondonSarnia
Toronto
Windsor
Waterloo
Owen SoundOntario
Michigan
New York
INDEX MAP
ExpresswayHighwayCanada - USA BoundaryWaterbody
KarstKnownInferredPotential
Municipality of Central Huron
N
Lake Huron
Londesborough
Kinburn
Clinton
Holmesville
¬«21
¬«8
¬«4
")1
")18
")31
")13
")15
MUNICIPALITY OF CENTRAL HURON
450000
450000
475000
475000
4825
000
4825
000
4850
000
4850
000
0 2.5 5 7.5 101.25Kilometres
DESIGN: ADGCAD/GIS: ADG/VMSCHECK: KGRREV: 0
Bedrock Surface Topographyin the Central Huron Area
PROJECT No. 10-214-11
NWMO Phase 1 Geoscientific Desktop Preliminary Assessment Study - Central Huron
DATE: 02/09/2015
G:\D
ata\
Proj
ect\S
edim
enta
ry_S
ite_N
WMO
\10-
214-
11_C
entra
lHur
on\C
entra
lHur
on_M
aps\
Cent
ralH
uron
_Suit
abilit
yRep
ort_
Maps
\10-
214-
11-1
10_C
entra
lHur
on_F
ig3_6
_Bed
rock
Surfa
ceTo
pogr
aphy
.mxd
1:140,000SCALE
TITLE
FIGURE3.6
LEGEND
COORDINATE SYSTEM: UTM NAD83 Zone 17NSOURCE:Basemap Layers: LIO, MNR, ESRIBuried Bedrock Valley: Gao, 2011aProduced by Geofirma Engineering Ltd under license from Ontario Ministry of Natural Resources, ©Queens Printer 2011
Lake Huron
Lake Erie
Lake Ontario
Georgian Bay
LondonSarnia
Toronto
Windsor
Waterloo
Owen SoundOntario
Michigan
New York
INDEX MAP
Bedrock Surface (mASL)
Municipality of Central HuronHighway/Major RoadHutton Height Buried Bedrock ValleyWaterbody
High : 350
Low : 95
N
Lake Huron
Lake Erie
Lake Ontario
Georgian Bay
LondonSarnia
Toronto
Windsor
Waterloo
Owen SoundOntario
Michigan
New York
Lake Huron
Londesborough
Kinburn
Clinton
Holmesville
¬«21
¬«8
¬«4
")1
")18
")31
")13
")15
MUNICIPALITY OF CENTRAL HURON
F011995
F012002F012003 F012006
N000554
T002842
T005779
T008915T009126
T011525T011737
T011957
T012177
F011882
F011886F011888F011890
F011891
F011893F011894
F011904
F011909
F011928F011941
F011951
F011953
F011962
F011965
F011968F011970
F011973F011974 F011975 F011976
F011977
F011978
F011981F011982
F011985
F011986F011987
F011988F011989
F011993F011997 F011998
F011999 F012000F012001
F012004F012005
F012008F012009 F012010F012011
F012013 F012014
F012016
F012017F012018
F012021
N000556
N000559
N004151
T000084
T000085 T000382
T000856
T000857
T001092
T001182
T002053
T002731T002731A
T002783
T003563
T003607
T003632T003632AT003785
T003895
T004413T004855
T005051
T005124
T005130
T005166T005182
T005326
T005397
T005404
T005478
T006251
T006341
T006346
T006364
T007104T007136
T007179
T007412
T008004
T008250
T008657
T008752T008753
T008843
T009355
T010054
T010686
T011523
T011524
T011634T011634A
T011649T011650T011651
T011714T011715T011716
T011861T011910
T011956T011959
T011960
T012326
F011881F013429
Line A
0003
0052
8
450000
450000
475000
475000
4825
000
4825
000
4850
000
4850
000
0 2.5 5 7.5 101.25Kilometres
DESIGN: ADGCAD/GIS: ADG/VMSCHECK: KGRREV: 0
Bedrock Geology, Oil and Gas Wells and 2D Seismic Line of the Central Huron Area
PROJECT No. 10-214-11
NWMO Phase 1 Geoscientific Desktop Preliminary Assessment Study - Sedimentary Sites
DATE: 9/3/2015
G:\D
ata\
Proj
ect\S
edim
enta
ry_S
ite_N
WMO
\10-
214-
11_C
entra
lHur
on\C
entra
lHur
on_M
aps\
Cent
ralH
uron
_Suit
abilit
yRep
ort_
Maps
\10-
214-
11-1
10_C
entra
lHur
on_F
ig3_7
_Bed
rock
Geolo
gyOi
lGas
Well
s.mxd
1:140,000SCALE
TITLE
FIGURE3.7
LEGEND
COORDINATE SYSTEM: UTM NAD83 Zone 17NSOURCE:Basemap Layers: LIO, MNR, ESRIGeology: OGS 2007Wells: OGSRL 2014aProduced by Geofirma Engineering Ltd under license from Ontario Ministry of Natural Resources, ©Queens Printer 2011
INDEX MAP
N
Bedrock GeologyMiddle Devonian
Dundee FmLucas Fm
Municipality of Central HuronHighway/Major RoadWaterbodyAcquired 2D Seismic DataOGSRL WellOGSRL Well with Geophysics Log
Fm = Formation
I
I
I
I
F011995
F012002F012003 F012006
N000554
T002842
T005779
T008915T009126
T011525T011737
T011957
T012177
F011882
F011886F011888
F011890F011891
F011893F011894
F011904
F011909
F011928F011941
F011951
F011953
F011962
F011965
F011968F011970
F011973F011974 F011975 F011976
F011977
F011978
F011981
F011982F011985
F011986F011987
F011988F011989
F011993F011997 F011998
F011999 F012000F012001
F012004F012005
F012008F012009 F012010
F012011
F012013 F012014
F012016
F012017F012018
F012021
N000556
N000559
N004151
T000084
T000085 T000382
T000856
T000857
T001092
T001182
T002053
T002731T002731A
T002783
T003563
T003607
T003632T003632AT003785
T003895
T004413T004855
T005051
T005124
T005130
T005166T005182
T005326
T005397
T005404
T005478
T006251
T006341
T006346
T006364
T007104T007136
T007179
T007412
T008004
T008250
T008657
T008752T008753
T008843
T009355
T010054
T010686
T011523
T011524
T011634T011634A
T011649T011650T011651
T011714T011715T011716
T011861T011910
T011956
T011959T011960
T012326
F011859 F011860F011862F011863
F011873
F011876 F011877
F011878 F011880
F011881
F011895
F011969
F011983
F011984
F012015
F012022
F012025F012026 F012027
F012040F012042
F013429
H000139
N002664
T000076
T000864
T001180
T002250T002380 T002556
T002768
T002774
T002799
T002801T002915
T003625
T003661
T004730
T004767T004853
T004864T004918
T005554T005555A
T005884
T005885T006307
T006322
T007307
T007415
T011565
T011820
Lake Huron
Londesborough
Kinburn
Clinton
Holmesville
¬«21
¬«8
¬«4
")1
")18
")31
")13
")15
MUNICIPALITY OF CENTRAL HURON
B
B'
A
A'
Line A
0003
0052
8
450000
450000
475000
475000
500000
500000
4825
000
4825
000
4850
000
4850
000
0 2 4 6 81Kilometres
DESIGN: ADGCAD/GIS: ADG/VMSCHECK: KGRREV: 0
Location of Cross-Sections and 2D Seismic Line
PROJECT No. 10-214-11
NWMO Phase 1 Geoscientific Desktop Preliminary Assessment Study - Sedimentary Sites
DATE: 10/7/2015
G:\D
ata\
Proj
ect\S
edim
enta
ry_S
ite_N
WMO
\10-
214-
11_C
entra
lHur
on\C
entra
lHur
on_M
aps\
Cent
ralH
uron
_Suit
abilit
yRep
ort_
Maps
\10-
214-
11-1
10_C
entra
lHur
on_F
ig3_8
_Bed
rock
Geolo
gyOi
lGas
Cros
sSec
tion.
mxd
1:200,000SCALE
TITLE
FIGURE3.8
LEGEND
COORDINATE SYSTEM: UTM NAD83 Zone 17NSOURCE:Basemap Layers: LIO, MNR, ESRICambrian Sandstone: Bailey & Cochrane, 1984aGeology: OGS 2007Wells: OGSRL 2014aProduced by Geofirma Engineering Ltd under license from Ontario Ministry of Natural Resources, ©Queens Printer 2011
Lake Huron
Lake Erie
Lake Ontario
Georgian Bay
LondonSarnia
Toronto
Windsor
Waterloo
Owen SoundOntario
Michigan
New York
INDEX MAP
N
Cross-Section (see Figures 3.12 and 3.13)I I
Bedrock GeologyMiddle Devonian
Lower Devonian
Dundee FmLucas FmAmherstburg Fm
Bois Blanc Fm
Municipality of Central HuronHighway/Major RoadWaterbodyAcquired 2D Seismic DataOGSRL WellOGSRL Well with Geophysics Log
Cambrian Sandstone
Fm = Formation
Lake Huron
Londesborough
Kinburn
Clinton
Holmesville
¬«21
¬«8
¬«4
")1
")18
")31
")13
")15
MUNICIPALITY OF CENTRAL HURON
AB
450000
450000
475000
475000
4825
000
4825
000
4850
000
4850
000
0 2.5 5 7.5 101.25Kilometres
DESIGN: NMPCAD/GIS: VMS/ADGCHECK: KGRREV: 0
First Vertical Derivative of the Pole Reduced Magnetic Field in the Central Huron Area
PROJECT No. 10-214-11NWMO Phase 1 Geoscientific Desktop Preliminary
Assessment Study - Central Huron
DATE: 4/14/2015
G:\D
ata\
Proj
ect\S
edim
enta
ry_S
ite_N
WMO
\10-
214-
11_C
entra
lHur
on\C
entra
lHur
on_M
aps\
Cent
ralH
uron
_Suit
abilit
yRep
ort_
Maps
\10-
214-
11-1
10_C
entra
lHur
on_F
ig3_9
_1VD
PR_M
agne
tic_F
ield.
mxd
1:140,000SCALE
TITLE
FIGURE3.9
LEGEND
COORDINATE SYSTEM: UTM NAD83 Zone 17NSOURCE:Basemap Layers: LIO, MNR, ESRIInterpreted Domains: PGW, 2015Magnetic Data: GSC, 2014; Spector, 1999Produced by Geofirma Engineering Ltd under license from Ontario Ministry of Natural Resources, ©Queens Printer 2011
Lake Huron
Lake Erie
Lake Ontario
Georgian Bay
LondonSarnia
Toronto
Windsor
Waterloo
Owen SoundOntario
Michigan
New York
INDEX MAP
First Vertical Derivative, Reduced
to Pole, Magnetic Field
N
Municipality of Central HuronHighway/Major RoadWaterbodyInterpreted Magnetic Domains
nT/m
Lake Huron
Londesborough
Kinburn
Clinton
Holmesville
¬«21
¬«8
¬«4
")1
")18
")31
")13
")15
MUNICIPALITY OF CENTRAL HURON
450000
450000
475000
475000
4825
000
4825
000
4850
000
4850
000
0 2.5 5 7.5 101.25Kilometres
DESIGN: NMPCAD/GIS: VMSCHECK: KGRREV: 0
Boyce and Morris (2002) Aeromagnetic Lineaments and Aeromagnetic Data in the Central Huron Area
PROJECT No. 10-214-11NWMO Phase 1 Geoscientific Desktop Preliminary
Assessment Study - Central Huron
DATE: 4/14/2015
G:\D
ata\
Proj
ect\S
edim
enta
ry_S
ite_N
WMO
\10-
214-
11_C
entra
lHur
on\C
entra
lHur
on_M
aps\
Cent
ralH
uron
_Suit
abilit
yRep
ort_
Maps
\10-
214-
11-1
10_C
entra
lHur
on_F
ig3_1
0_Bo
yce_
and_
Morri
s_Lin
eam
ents_
Aero
mag
.mxd
1:140,000SCALE
TITLE
FIGURE3.10
LEGEND
COORDINATE SYSTEM: UTM NAD83 Zone 17NSOURCE:Basemap Layers: LIO, MNR, ESRILineaments: Boyce and Morris 2002Magnetic Data: GSC, 2014; Spector, 1999Produced by Geofirma Engineering Ltd under license from Ontario Ministry of Natural Resources, ©Queens Printer 2011
Lake Huron
Lake Erie
Lake Ontario
Georgian Bay
LondonSarnia
Toronto
Windsor
Waterloo
Owen SoundOntario
Michigan
New York
INDEX MAP
N
Boyce & Morris
Municipality of Central HuronHighway/Major RoadWaterbody
Minor Aeromagnetic LineamentMajor Aeromagnetic Lineament
First Vertical Derivative, Reduced to Pole,
Magnetic Field
nT/m
Lake Huron
Londesborough
Kinburn
Clinton
Holmesville
¬«21
¬«8
¬«4
")1
")18
")31
")13
")15
MUNICIPALITY OF CENTRAL HURON
440000
440000
450000
450000
460000
460000
470000
470000
480000
480000
4820
000
4820
000
4830
000
4830
000
4840
000
4840
000
4850
000
4850
000
0 2.5 5 7.5 101.25Kilometres
DESIGN: NMPCAD/GIS: VMSCHECK: KGRREV: 0
First Vertical Derivative of the Bouguer Gravity in the Central Huron Area
PROJECT No. 10-214-11NWMO Phase 1 Geoscientific Desktop Preliminary
Assessment Study - Central Huron
DATE: 10/7/2015
G:\D
ata\
Proj
ect\S
edim
enta
ry_S
ite_N
WMO
\10-
214-
11_C
entra
lHur
on\C
entra
lHur
on_M
aps\
Cent
ralH
uron
_Suit
abilit
yRep
ort_
Maps
\10-
214-
11-1
10_C
entra
lHur
on_F
ig3_1
1_1V
DBou
guer
Grav
ity.m
xd
1:140,000SCALE
TITLE
FIGURE3.11
LEGEND
COORDINATE SYSTEM: UTM NAD83 Zone 17NSOURCE:Basemap Layers: LIO, MNR, ESRIPinnacle Reefs: MRD276 Regional structure and isopach mapsof potential hydrocarbon-bearing strata for southern Ontario, OGS, 2011Gravity Data: GSC, 2014; PGW, 2015Produced by Geofirma Engineering Ltd under license from Ontario Ministry of Natural Resources, ©Queens Printer 2011
Lake Huron
Lake Erie
Lake Ontario
Georgian Bay
LondonSarnia
Toronto
Windsor
Waterloo
Owen SoundOntario
Michigan
New York
INDEX MAP
N
First Vertical Derrivative of Bouguer Gravity
mGal/m
Municipality of Central HuronHighway/Major RoadWaterbodyPinnacle Reef
Geological Cross Section A-A' NWMO Phase I Geoscientific Desktop Preliminary Assessment Study - Central Huron
FIGURE 3.12 Doc. No.:10-214-11-110_CentralHuron_Fig3_12_CrossSectionA.cdr
Prepared by: NDR/ADG/NMP
Reviewed by: KGR/SNS
Date: Oct 7, 2015
Devonian
Overburden
Silurian
Upper Ordovician Shale
Upper Ordovician Limestone
Precambrian
Cambrian
Gamma Log
Interpreted Formation TopLow ConfidenceHigh Confidence
Vertical Exaggeration = 25x
OGSRL Pinacle Reef
Cross Section A-A’
A A’
300
200
100
0
-100
-200
-300
-400
-500
-600
-700
Ele
vatio
n (
mA
SL)
40
-800
-900
Distance (km)
10 30 50 60 7020
Municipality of Central Huron
Municipality of Central Huron
Southwest Northeast
F0118
93
T0051
30
T0047
67
T0027
83
T0027
74
F0119
70
T0058
85
T0063
22
T0020
53
F0120
21
F0119
82
F0119
78
Coboconk
Bass Island
Salina G Unit
Ground Surface
Bedrock Surface
Cabot Head
Cobourg
Precambrian
Queenston
SOURCE:Wells: OGSRL, 2014aPinnacle Reef: OGS, 2011
Geological Cross Section B-B'NWMO Phase I Geoscientific Desktop Preliminary Assessment Study - Central Huron
FIGURE 3.13 Doc. No.:10-214-11-110_CentralHuron_Fig3_13_CrossSection_B.cdr
Prepared by: NDR/ADG
Reviewed by: KGR/SNS
Date: Feb 4, 2015
Gamma Log
Devonian
Overburden
Silurian
Upper Ordovician Shale
Upper Ordovician Limestone
Precambrian
Cambrian
Interpreted Formation Top
Low ConfidenceHigh Confidence
Vertical Exaggeration = 25x
Cross Section B-B’
B B’
Ground Surface
Bedrock Surface
Bass Island
Salina G Unit
Cabot Head
Queenston
Cobourg
Coboconk
Precambrian
300
200
100
0
-100
-200
-300
-400
-500
-600
-700
Ele
vatio
n (
mA
SL)
40
-800
-900
10 20 30
Distance (km)
Municipality of Central Huron
SOURCE:Wells: OGSRL, 2014a
Municipality of Central Huron
Northwest Southeast
T0053
26
F0118
80
F0118
82
F0118
94
F0119
74
F0119
70
T0051
24
H00
0139
Lake Huron
Londesborough
Kinburn
Clinton
Holmesville
¬«21
¬«8
¬«4
")1
")18
")31
")13
")15
MUNICIPALITY OF CENTRAL HURON
850
1000
1000
F012018
F011893
T006364
450000
450000
475000
475000
4825
000
4825
000
4850
000
4850
000
0 2.5 5 7.5 101.25Kilometres
DESIGN: ADGCAD/GIS: ADG/VMSCHECK: KGRREV: 0
Depth to Top of the Coboconk Formationin the Central Huron Area
PROJECT No. 10-214-11
NWMO Phase 1 Geoscientific Desktop Preliminary Assessment Study - Central Huron
DATE: 4/14/2015
G:\D
ata\
Proj
ect\S
edim
enta
ry_S
ite_N
WMO
\10-
214-
11_C
entra
lHur
on\C
entra
lHur
on_M
aps\
Cent
ralH
uron
_Suit
abilit
yRep
ort_
Maps
\10-
214-
11-1
10_C
entra
lHur
on_F
ig3_1
4_De
pth_
to_C
oboc
onk.
mxd
1:140,000SCALE
TITLE
FIGURE3.14
LEGEND
COORDINATE SYSTEM: UTM NAD83 Zone 17NSOURCE:Basemap Layers: LIO, MNR, ESRIWells: OGSRL 2014aProduced by Geofirma Engineering Ltd under license from Ontario Ministry of Natural Resources, ©Queens Printer 2011
Lake Huron
Lake Erie
Lake Ontario
Georgian Bay
LondonSarnia
Toronto
Windsor
Waterloo
Owen SoundOntario
Michigan
New York
INDEX MAP
900
950
1000
WaterbodyHighway/Major Road
OGSRL Well with Data Used to Create Top of the CoboconkFormation
OGSRL Well with Geophysics LogOGSRL Well
Depth to the Coboconk Formation (mBGS)
Municipality of Central Huron
Contour of Depth to the Coboconk Formation (50minterval)
High : 1047
Low : 809
N