You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
slide<br />
1<br />
<strong>Marcellus</strong> <strong>and</strong> <strong>Utica</strong> <strong>in</strong> <strong>the</strong> <strong>Field</strong>:<br />
Look<strong>in</strong>g at Faults, Fractures <strong>and</strong> Folds<br />
That Affect <strong>the</strong> Sedimentary Units<br />
of <strong>the</strong><br />
Nor<strong>the</strong>rn Appalachian Bas<strong>in</strong><br />
Robert Jacobi<br />
Norse Energy Corp, USA <strong>and</strong> UB Rock Fracture Group
slide<br />
O<strong>the</strong>r geologists of <strong>the</strong> UB Rock Fracture Group<br />
who have contributed to <strong>the</strong> NYS database:<br />
John Founta<strong>in</strong>, Chuck Mitchell, Meng Zhao, Ji<strong>and</strong>ong Xu, Paul Agle,<br />
Andy Baudo, Gareth Cross, Cheri Drecshel, Jodi Fisher, Allison Harper,<br />
Stacey Hanson, Courtney Lugert, Kelly McGuire, Travis Nelson, Todd Peters,<br />
2<br />
Michelle Reay, Josh Stroup, Nick Terech, Beth Tober,<br />
Alecia Wawrzynski, Todd Witmer, D<strong>in</strong>o Zack,<br />
<strong>and</strong> Industrial Associates
slide<br />
3<br />
Research Supported by:<br />
EDMAP, STATEMAP, NSF, NYSERDA, DOE,<br />
<strong>and</strong><br />
INDUSTRIAL ASSOCIATES
slide<br />
4<br />
Web<strong>in</strong>ar Outl<strong>in</strong>e<br />
1) Faults? What faults? Evidence for N-Strik<strong>in</strong>g Fault<br />
Systems<br />
2) Effects of N-strik<strong>in</strong>g faults <strong>in</strong> general<br />
3) Arcuate (map pattern) Fault System: <strong>the</strong> Iapetenopen<strong>in</strong>g<br />
Rift Faults<br />
4) <strong>Marcellus</strong> Fracture Background (an aside)<br />
5) Effects of N-strik<strong>in</strong>g faults on black shale (Geneseo)<br />
6) Influence of Arcuate Fault (<strong>and</strong> Fold) System on<br />
black shales (<strong>Utica</strong>, <strong>Marcellus</strong>, <strong>and</strong> Geneseo) <strong>and</strong><br />
hydro<strong>the</strong>rmal fracture reservoirs (T/Br)
slide<br />
5<br />
Watk<strong>in</strong>s Glen<br />
NYC<br />
Jacobi (2006)
slide<br />
6<br />
Commonly Recognized Faults, circa 1989<br />
Jacobi (2010)
slide<br />
7<br />
Folds <strong>in</strong> PA from Beardsley et al (1999)<br />
Folds <strong>in</strong> NY from Wedel (1932)<br />
Jacobi et al. (2004)
slide<br />
GBLZ<br />
THSZ<br />
8<br />
Central<br />
Gneiss Belt<br />
CMBBZ (F)<br />
Elzevir Terrane<br />
CMBBZ (T, W, M)<br />
CMBBZ (E, H)<br />
Baranoski (1989)<br />
EFBZ<br />
Central Metasedimentary Belt<br />
CLF<br />
EFBZ<br />
ELOSZ<br />
50 mi<br />
50 km<br />
Frontenac Terrane<br />
CCMZ<br />
Harper & Laughrey (1987)<br />
Central Granulite<br />
Terrane<br />
Jacobi (2002)
slide<br />
9<br />
Jacobi (1993)
slide 10<br />
Jacobi (2009)
slide 11<br />
Jacobi (2009)
slide<br />
12<br />
Jacobi (1992)
slide<br />
13<br />
Selected fault systems from Jacobi (2002)
slide<br />
14<br />
INTEGRATED RESEARCH TASKS<br />
1. OUTCROP STRATIGRAPHY/SEDIMENTOLOGY<br />
Approximately 2000 outcrops measured at <strong>the</strong> cm scale<br />
2. DETAILED FRACTURE ANALYSES<br />
N<strong>in</strong>e characteristics measured at 2000 outcrops on ~ 100,000 fractures<br />
3. LINEAMENT RECOGNITION (REMOTE SENSING)<br />
L<strong>and</strong>Sat, Slar, hyperspectral (GER), ASTER, airphoto, DEM, topo<br />
4. SOIL GAS ANALYSES<br />
Approximately 21,000 analyses<br />
5. WELL LOG ANALYSES<br />
Approximately 450 analyses<br />
6. AEROMAGNETICS/GRAVITY<br />
7. SEISMIC REFLECTION ANALYSES<br />
U B<br />
More than 1000 miles <strong>in</strong>terpreted (most proprietary, <strong>in</strong>clud<strong>in</strong>g 3D cubes)<br />
Rock Fracture Group
slide<br />
15<br />
50 mi<br />
50 km
slide<br />
16<br />
GBLZ<br />
THSZ<br />
Central<br />
Gneiss Belt<br />
CMBBZ (F)<br />
Elzevir Terrane<br />
CMBBZ (T, W, M)<br />
CMBBZ (E, H)<br />
Baranoski (1989)<br />
EFBZ<br />
Central Metasedimentary Belt<br />
CLF<br />
EFBZ<br />
ELOSZ<br />
50 mi<br />
50 km<br />
Frontenac Terrane<br />
CCMZ<br />
Harper & Laughrey (1987)<br />
Central Granulite<br />
Terrane<br />
Jacobi (2002)
slide<br />
17<br />
Jacobi et al. (2002)
slide<br />
18<br />
Jacobi et al. (2002)
slide<br />
19<br />
50 mi<br />
50 km<br />
Jacobi et al. (2002)
slide<br />
20<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1993, 1996, 2002)
slide<br />
21<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1993, 1996, 2002)
slide<br />
22<br />
94-196<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1996)
slide<br />
23<br />
CRAWFORD CREEK REGION<br />
WEST EAST<br />
50 cm<br />
Set I (J2)<br />
Set II<br />
50 cm<br />
147<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1996)
slide<br />
24<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (2002)
Jacobi <strong>and</strong> Founta<strong>in</strong> (2002)
slide<br />
26<br />
Jacobi (2010)
slide<br />
27<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (2002)
slide<br />
28<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (2002)
slide<br />
94-193<br />
29<br />
Jacobi (2010)
slide<br />
Cuba Oil Spr<strong>in</strong>g<br />
30<br />
Jacobi <strong>and</strong> Smith (2010)
slide 31<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (2002)
Jacobi et al. (2003)
Jacobi et al. (2003)
slide<br />
34<br />
Smith <strong>and</strong> Jacobi (2001)
slide<br />
35
Rh<strong>in</strong>estreet Shale Isopach Map<br />
slide<br />
contours <strong>in</strong> ft<br />
of high TOC<br />
Isopach <strong>and</strong> CLF location<br />
from Lash <strong>and</strong> Blood (2006)<br />
36
slide<br />
37<br />
Jacobi et al. (2003)
Jacobi (2010)
slide<br />
39<br />
Baudo <strong>and</strong> Jacobi (1999), Jacobi <strong>and</strong> Baudo (1999)
slide<br />
40<br />
Baudo <strong>and</strong> Jacobi (1999), Jacobi <strong>and</strong> Baudo (1999)
slide<br />
41<br />
Bedd<strong>in</strong>g Orientation<br />
N = 225<br />
50 m<br />
N<br />
N = 80<br />
20<br />
Fault Orientation<br />
83<br />
Equal<br />
Area<br />
NORTH FAULT<br />
51<br />
BEDDING<br />
FAULT = 342 o , 83 o E<br />
15<br />
BEDDING<br />
MONOCLINE<br />
PLUNGE = 179 o , 1 o<br />
N = 42<br />
Jacobi <strong>and</strong> Baudo (1999)
slide<br />
42<br />
S h<br />
S H
slide<br />
43<br />
Zhao (1997), Zhao <strong>and</strong> Jacobi (1996))
slide<br />
44<br />
Jacobi et al. (2002)
Jacobi et al. (2004)
Jacobi et al. (2003)
Jacobi et al. (2003)
slide<br />
50<br />
END PART I
51<br />
C<strong>in</strong>c<strong>in</strong>nati Arch Acadian Highl<strong>and</strong>s<br />
UPPER DEVONIAN BLACK SHALE<br />
FRACTURE CONSIDERATIONS
52<br />
C<strong>in</strong>c<strong>in</strong>nati Arch Acadian Highl<strong>and</strong>s<br />
UPPER DEVONIAN MARCELLUS BLACK SHALE<br />
FRACTURE CONSIDERATIONS
LAURENTIA<br />
after van Staal (2006)<br />
GANDERIA AVALONIA<br />
This map is copyrighted Ron Blakey, <strong>and</strong> may be used, with citation to Ron<br />
Blakey, NAU Geology, for educational, non-profit, non-commercial purposes.
54<br />
from Smith, G; Jacobi, R; Seever, J;<br />
<strong>and</strong> Loewenste<strong>in</strong> (2009)<br />
B<br />
A<br />
from Nyahay, Leone, Smith, Mart<strong>in</strong>, <strong>and</strong> Jarvie (2008)<br />
Modifications based on Ver Straeten (1994) <strong>and</strong> Smith <strong>and</strong> Leone (2010)
55<br />
Chittenango<br />
Cherry Valley<br />
Union Spr<strong>in</strong>gs<br />
Jacobi <strong>and</strong> Smith (200
59<br />
J1 or Set III<br />
from Lash, Loewy, & Engelder (2004)
60<br />
From 2008 March Explorer (Durham)
61<br />
Zoback <strong>and</strong> Zoback (1991)
62<br />
From 2008 March Explorer (Durham). Rose diagram of fractures <strong>in</strong> <strong>the</strong> same area (Jacobi, 2007)
The box encloses <strong>the</strong> <strong>in</strong>terquartile range of <strong>the</strong> data set population; bounded on <strong>the</strong> left by <strong>the</strong> 25th percentile (lower quartile) <strong>and</strong> on <strong>the</strong> right by <strong>the</strong> 75th<br />
percentile (upper quartile). The vertical l<strong>in</strong>e through <strong>the</strong> box is <strong>the</strong> median value <strong>and</strong> <strong>the</strong> „„whiskers‟‟ represent <strong>the</strong> extremes of <strong>the</strong> sample range. Statistical<br />
outliers are represented by data po<strong>in</strong>ts (filled squares) that fall outside of <strong>the</strong> extremes of <strong>the</strong> sample range. Lash <strong>and</strong> Engelder (2007)<br />
63
64<br />
After Engelder <strong>and</strong> Lash (2008). “Zipper” tectonic model from Hatcher (2002)
65<br />
The collision of <strong>the</strong> two<br />
“hockey pucks” sets up an<br />
<strong>in</strong>ternal stress field just as<br />
both <strong>the</strong> <strong>Marcellus</strong> black<br />
shale <strong>and</strong> Pottsville coal<br />
enter <strong>the</strong> oil w<strong>in</strong>dow<br />
After Engelder <strong>and</strong> Lash (2008). Tectonic model after Hatcher (2002)
66<br />
C<strong>in</strong>c<strong>in</strong>nati Arch Acadian Highl<strong>and</strong>s<br />
Effect of N-strik<strong>in</strong>g Faults on N-<br />
Strik<strong>in</strong>g Fracture Frequency
67<br />
Jacobi (2002)
68<br />
FREQUENCY<br />
of<br />
NS-STRIKING<br />
FRACTURES<br />
<strong>in</strong> <strong>the</strong><br />
DEVONIAN GENESEO<br />
BLACK SHALE<br />
<strong>and</strong><br />
TULLY LIMESTONE<br />
ALONG EW TRANSECTS<br />
Jacobi et al. ( 2008)
69<br />
Jacobi et al. ( 2008)
70<br />
Jacobi ( 2007)<br />
MUTUALLY<br />
INTERSECTING<br />
MUTUALLY<br />
ABUTTING<br />
FAULTS<br />
UNKNOWN ABUTS<br />
AMONG GOLD
71<br />
Jacobi ( 2007)<br />
MUTUALLY<br />
INTERSECTING<br />
MUTUALLY<br />
ABUTTING<br />
FAULTS<br />
UNKNOWN ABUTS<br />
AMONG GOLD
72<br />
A<br />
Jacobi (2007)<br />
B
73<br />
Structural Contour Map of <strong>the</strong> base<br />
of <strong>the</strong> Rh<strong>in</strong>estreet Fm.<br />
(from Bradley <strong>and</strong> Pepper ,1938)<br />
1500<br />
1400<br />
1500<br />
1300<br />
D<br />
U<br />
1400<br />
1300<br />
U<br />
D<br />
1400<br />
1500<br />
1400<br />
1400<br />
SENECA LAKE Watk<strong>in</strong>s Glen<br />
H<br />
V<br />
U<br />
D<br />
D<br />
U<br />
1300<br />
D<br />
U<br />
D U<br />
0 5 km<br />
Burdett<br />
1400<br />
Ovid<br />
1500<br />
Lodi<br />
1400<br />
1700<br />
1600<br />
1500<br />
1600<br />
1300<br />
1400<br />
Structure contours<br />
<strong>and</strong> faults after:<br />
Bradley et al (1941)
74<br />
Structural Contour Map of <strong>the</strong> Base<br />
of <strong>the</strong> Rh<strong>in</strong>estreet Fm.<br />
(from Bradley <strong>and</strong> Pepper ,1938)<br />
1500<br />
1400<br />
1500<br />
1300<br />
D<br />
U<br />
1400<br />
1300<br />
U<br />
D<br />
1400<br />
1500<br />
1400<br />
1400<br />
SENECA LAKE Watk<strong>in</strong>s Glen<br />
H<br />
V<br />
U<br />
D<br />
D<br />
U<br />
1300<br />
D<br />
U<br />
D U<br />
0 5 km<br />
Burdett<br />
1400<br />
Ovid<br />
1500<br />
Lodi<br />
1400<br />
1700<br />
1600<br />
1500<br />
1600<br />
1300<br />
1400<br />
Structure contours<br />
<strong>and</strong> faults after:<br />
Bradley et al (1941)
75<br />
Structural Contour Map of <strong>the</strong> Base<br />
of <strong>the</strong> Rh<strong>in</strong>estreet Fm.<br />
(from Bradley <strong>and</strong> Pepper ,1938)<br />
1500<br />
1400<br />
1500<br />
1300<br />
D<br />
U<br />
1400<br />
1300<br />
U<br />
D<br />
1400<br />
1500<br />
1400<br />
1400<br />
SENECA LAKE Watk<strong>in</strong>s Glen<br />
H<br />
V<br />
U<br />
D<br />
D<br />
U<br />
1300<br />
D<br />
U<br />
D U<br />
0 5 km<br />
Burdett<br />
1400<br />
Ovid<br />
1500<br />
Lodi<br />
1400<br />
1700<br />
1600<br />
1500<br />
1600<br />
1300<br />
1400<br />
Structure contours<br />
<strong>and</strong> faults after:<br />
Bradley et al (1941)
76<br />
Effect of ENE-strik<strong>in</strong>g Faults on ENE-<br />
Strik<strong>in</strong>g Fracture Frequency
77<br />
ENE-strik<strong>in</strong>g, high-frequency<br />
fractures <strong>in</strong> <strong>the</strong> Geneseo<br />
Jacobi (2007)
78<br />
FREQUENCY<br />
of<br />
ENE-STRIKING<br />
FRACTURES<br />
<strong>in</strong> <strong>the</strong><br />
DEVONIAN GENESEO<br />
BLACK SHALE<br />
<strong>and</strong><br />
TULLY LIMESTONE<br />
Jacobi et al. ( 2008)
79<br />
Jacobi et al. ( 2008)
80<br />
Jacobi et al. ( 2008)
81<br />
SENECA LAKE TRANSECT<br />
UB<br />
ENE<br />
Rock Fracture Group<br />
VALOIS HECTOR<br />
ENE<br />
2 km<br />
NORTH SOUTH<br />
EW<br />
EW<br />
FRACTURES<br />
LINEAMENTS<br />
SOIL GAS<br />
2.5<br />
1.5<br />
0.5<br />
0<br />
15<br />
10<br />
5<br />
0<br />
32<br />
28<br />
24<br />
20<br />
16<br />
12<br />
8<br />
4<br />
0<br />
Fractures/meter<br />
Peaks/km L<strong>in</strong>eaments/<br />
1.32 km<br />
Jacobi et al. (2003)
82<br />
Jacobi et al. (2003)
83<br />
SENECA LAKE TRANSECT<br />
UB<br />
ENE<br />
Rock Fracture Group<br />
VALOIS HECTOR<br />
ENE<br />
2 km<br />
NORTH SOUTH<br />
EW<br />
EW<br />
FRACTURES<br />
LINEAMENTS<br />
SOIL GAS<br />
2.5<br />
1.5<br />
0.5<br />
0<br />
15<br />
10<br />
5<br />
0<br />
32<br />
28<br />
24<br />
20<br />
16<br />
12<br />
8<br />
4<br />
0<br />
Fractures/meter<br />
Peaks/km L<strong>in</strong>eaments/<br />
1.32 km<br />
Jacobi et al. (2003)
84<br />
v<br />
v<br />
Jacobi et al. (2003)
85<br />
Jacobi (2002)
86<br />
Jacobi <strong>and</strong> Smith ( 2000)
87<br />
Jacobi <strong>and</strong> Smith ( 2000)
88<br />
Open fractures <strong>and</strong> faults observed <strong>in</strong> <strong>the</strong> <strong>Marcellus</strong> <strong>in</strong>terval on FMI logs<br />
Jacobi ( 2010)
89<br />
THRUST AND FOLD DEFORMATION<br />
IN DEVONIAN<br />
MARCELLUS BLACK SHALE
91<br />
Jacobi et al. (2003)
92<br />
Jacobi et al. (2003)
slide 93 Jacobi ( 2010)
94<br />
Jacobi (2002)
95<br />
Jacobi <strong>and</strong> Smith ( 2000)
96<br />
Jacobi <strong>and</strong> Smith (2000), Jacobi et al. (2008)
slide 97
slide 98<br />
UPPER ORDOVICIAN UTICA BLACK SHALE<br />
FAULTS AND FRACTURES<br />
Jacobi (2010)
99<br />
From Nyahay, Leone,<br />
Smith, Mart<strong>in</strong>, <strong>and</strong><br />
Jarvie (2008)
100<br />
UTICA<br />
FROM BRADLEY AND KIDD, 1991
101<br />
Tectonic Model for <strong>the</strong> Taconic Orogeny Show<strong>in</strong>g Eastward Subduction, Peripheral<br />
Bulge Effects, <strong>and</strong> Mohawk Valley Block-Fault<strong>in</strong>g. Modified from Jacobi (1981).
102<br />
Revised from Jacobi <strong>and</strong> Mitchell, 2002, based on new data from core 75NY2,<br />
pers. com. C. E. Mitchell <strong>and</strong> M. Roloson, 2010
103<br />
Jacobi (2002)
104<br />
from Cross, (2008), Jacobi et al., (2008),<br />
after Fisher (1980)
105<br />
Jacobi et al. (2007)
Agle ( 2007); Agle et al. (2007)
Variability <strong>in</strong> <strong>Utica</strong> Fractures <strong>in</strong> Little Falls Graben<br />
Agle ( 2007); Agle et al. (2007)<br />
Variability <strong>in</strong> Orientation of Healed <strong>Utica</strong> Fractures from FMI Logs<br />
Jacobi et al. (2008, 2009)
108<br />
Jacobi et al. (2007)
Dolgeville<br />
Hydro Dam<br />
109<br />
Dolgeville Fault<br />
Horizontal drag fold axes<br />
Down dip slickenfibers<br />
Agle et al. (2006), Jacobi et al. (2006, 2007, 2008)
W E<br />
Jacobi (2010)
NO ENE FRACTURES<br />
0 20 40 60 80 100<br />
Distance from Fault (m)<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
Bedd<strong>in</strong>g Dip<br />
Bedd<strong>in</strong>g Dip<br />
Agle et al. (2006, 2008); Jacobi et al. 2008, 2009)
112<br />
Jacobi et al. (2003)
113<br />
from Jacobi et al., (2008), Cross, (2008),<br />
after Fisher (1980)
114<br />
from Jacobi et al., (2008), Cross, (2008)
M<strong>in</strong>eralization vs. Distance from Fault Sets<br />
WNW Faults<br />
115<br />
N Fault<br />
NNE Faults<br />
N Fault<br />
NNE Faults<br />
Agle et al. (2006, 2008); Jacobi et al. 2008)
slide<br />
116<br />
Jacobi (2002)
117<br />
APPENDIX A<br />
SHORT REVIEW OF T/BR<br />
(TRENTON/BLACK RIVER)<br />
IN NYS
after Smith <strong>and</strong> Nyahay (2006)
U B<br />
Rock Fracture Group<br />
From Beardsley, 2000
U B<br />
Rock Fracture Group<br />
Jacobi 2007)
Jacobi (2007), L<strong>in</strong>eaments from EarthSat (1997)
Jacobi et al. 2003)
Agle et al. (2006, 2008); Jacobi et al. 2008)
2<br />
1<br />
1<br />
3<br />
Jacobi et al. (2008)
Releas<strong>in</strong>g bend (rhombochasm) geometry <strong>in</strong>dicates sense of motion<br />
Agle et al. (2006, 2008); Jacobi et al. 2008)
Jacobi et al. (2008)
127<br />
APPENDIX B<br />
FRACTURE INTENSIFICATION DOMAIN<br />
WHITE CREEK EXAMPLE
slide<br />
128<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1993)
slide<br />
129<br />
181-3<br />
180-2<br />
50 cm<br />
CENTER OF WHITE CREEK NS ZONE<br />
50 cm<br />
50 cm<br />
180a-1<br />
100 cm<br />
181-2<br />
Jacobi <strong>and</strong> Xu (1998)
slide<br />
130<br />
Jacobi <strong>and</strong> Xu (1998)
WEST EAST<br />
slide<br />
24<br />
20<br />
16<br />
12<br />
8<br />
4<br />
0<br />
131<br />
FREQUENCY (f/m)<br />
WHITE CREEK NS ZONE<br />
= NS, SCANLINE<br />
= NS, SCANGRIND<br />
= NW-SE<br />
1 km<br />
Jacobi <strong>and</strong> Xu (1998)
132<br />
APPENDIX C<br />
MARCELLUS AND UTICA BASIC DATA<br />
FROM<br />
Nyahay, Leone, Smith, Mart<strong>in</strong>, <strong>and</strong> Jarvie (2008)
133<br />
<strong>Marcellus</strong> Structure Contours<br />
from Nyahay, Leone, Smith, Mart<strong>in</strong>, <strong>and</strong> Jarvie (2008)
134<br />
Union Spr<strong>in</strong>gs Isopach<br />
from Nyahay, Leone, Smith, Mart<strong>in</strong>, <strong>and</strong> Jarvie (2008)
slide 135<br />
<strong>Marcellus</strong> TOC<br />
Union Spr<strong>in</strong>gs Ro% (vitr<strong>in</strong>ite reflectance)<br />
from Nyahay, Leone, Smith, Mart<strong>in</strong>, <strong>and</strong> Jarvie (2008)
136<br />
UTICA STRUCTURE CONTOUR MAP<br />
UTICA ISOPACH MAP<br />
from Nyahay, Leone, Smith, Mart<strong>in</strong>, <strong>and</strong> Jarvie (2008)
137<br />
APPENDIX D<br />
UTICA FRACTURE DATA<br />
FROM<br />
CORE 75-NY-2
138<br />
Core 75-NY-2<br />
from Jacobi et al., (2008), Cross, (2008),<br />
after Fisher (1980)
139<br />
Up<br />
from Hanson et al. (2010), Hanson (2010)
140<br />
from Hanson et al. (2010), Hanson (2010)
141<br />
from Hanson et al. (2010), Hanson (2010)
142<br />
APPENDIX E<br />
EXAMPLE OF LINEAMENTS OF THE CLF<br />
AND “GROUNDTRUTHING”<br />
FROM WELL LOGS
slide<br />
143<br />
1 MI<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1996)
slide<br />
144<br />
1 MI<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1996)
slide<br />
145<br />
Houghton Quadrangle<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1996)
slide<br />
146<br />
Houghton Quadrangle<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1996)
slide<br />
147<br />
Jacobi <strong>and</strong> Founta<strong>in</strong> (1989, 1993, 1996)