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Marcellus and Utica in the Field

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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)

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