same

as above

w/ ~1%

pebbles

up to 5 mm

1

3

5

7

9

11

11

13

15

17

19

21

21

23

25

27

29

31

31

33

35

37

39

41

BL Black(10YR2/1);

VDG V. Dk Gray ( 10YR3/1); 

VDGB V. Dk Gray Brown ( 2.5YR3/2-3/3); 

VDB V. Dk Brown(10YR2/2); 

DOB Dk. Olive Brown(2.5YR3/3); 

OB Olive Brown(2.5YR4/3-4/4); 

LOB Light Olive Brown(2.5YR5/4); 

YB Yellow Brown(10?YR5/6); 

GrBl Greenish black (Gley 3/10Y);

DGrG Dark greenish gray (Gley 3-4/5G-5GY)

Texture (visual) 

LOB 

st f-m sand;

50% bioturb.

"plow

zone,"

VDGB 

sd cl silt

DOB 

sd st claysd cl silt;

20-30%

bioturb.

OB st clay

OB sd st clay

OB 

cl vf sd silt

DOB 

pebbly 

sd st clay

DOB 

1% pebbly 

sd st clay

OB 

1-3% pebbly 

st cl sandsd cl silt

OB vf sd cl silt

DOB

vf sd cl silt

OB f sd cl silt,

>50% bioturb.

DOB sd st clay

VDB st clay

VDGB

sd st clay

VDB 

sd cl silt

BL st clay

BL clay

BL clay

BL clay

VDB 

sd st clay

VDG clay

VDG clay

BL sd st clay

OB 

sd st clay

OB 

sdr st clay

OB st clay

OB sd cl silt

OB vf sd cl silt

OB vf sd cl silt

OB vf sdr silt

OB vf-f st sand

OB f st sand

OB f-c sand

OB st f sand

OB st

vf-m sand

DG st vf sd

w/ charcoal & ash

DG st vf-f SD

DG st vf-f SD

DG vf-f sd st CL

DG vf-f sd cl ST

DG vf-f sd ST

DG vf-f SD

DG vf sd ST

DG vf-f sd cl ST

DG st cl f-c SD

(minor gv)

DG st gv cl f-c SD

loose

DGB cl gv 

m-vc SD

loose

DGB

gv vc SD

VDGB

gv vc SD

soil, GrBl

organic st CL

stiff A-horiz., DGrG

vf sd cl ST

stiff B-horiz.,

DGrG

vf sd st CL

cohesive

DG cl gv 

m-vc SD

DG st f-m SD

GB f-vc sand

DGB m-vc sand

mottled LOB/GB

st vf-f SD

mottled 

G/LOB/GB

st vf-f SD

GB/OB/DGB

lam. ST/vf-f SD

DGB vf-vc SD

DGB st vf-vc SD

OB m sand

OB sd cl silt

OB st cl f sand

OB st cl

vf sand

OB cl c sd/p gv

OB 

sd st clay

OB 

vf sd cl

silt

OB vf sd st

clay

LOB st clay

soil, VDGB

f-m sd

(cl silt &

st clay)

soil, VDGB

f sd

cl silt

soil, VDGB

sd st clay

soil, VDGB

st clay, ~40% mixed

w/sd st from

above in fissures

or in krotovina

BL clay (no sd)

xx

PHOTO-LOG 

CORE SNC007* VDGB

f sd

st clay

VDGB

vf sd

cl silt

DB-DOB

f sd +

st + cl

DOB

f sd +

st + cl

 No reaction to 10% HCL in matrix

 Sandy section

x Blebs of CO3

X Scattered nodules of CO3

Carbonates

Abundant 5-10 mm nodules of CO3

A few ~1 mm blebs of CO3

 = R adiocarbon sample 

MR-07-1

MR-07-3&3A

MR-07-2

MR-07-4

MR-07-5

MR-07-6

MR-07-7

MR-07-8

MR-07-9

k

OB sd + st+p gv

OB c-vc sd+p gv

krotovina

kz krotovina

Colors

cl clay

st silt

sd sand

clr clayier

str siltier

sdr sdr 

f fine

vf v.fine

m med

c coarse

Depth (ft)

*Note: Laboratory 

analysis of this core 

appears in Bennett and 

others (2011); see 

accompanying pamphlet 

for reference

krotovina

gradational

change

ABBREVIATIONS

EXPLANATION

This map was printed on an electronic plotter directly from digital files. Dimensional calibration may vary between electronic plotters and 

between X and Y directions on the same plotter, and paper may change size due to atmospheric conditions; therefore,

scale and proportions may not be true on plots of this map.

For sale by U.S. Geological Survey, Information Services, Box 25286, Federal Center, Denver, CO 80225, 1-888-ASK-USGS

Available on World Wide Web at http://pubs.usgs.gov/of/2012/1011/

Any use of trade, firm, or product names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. 

Government 

Manuscript approved for publication January 13, 2012

U.S. Department of the Interior

U.S. Geological Survey 

Open-File Report 2012-1011

Sheet 5 of 5

Pamphlet accompanies map

Logs and Data from Trenches

Across and Near the

Green Valley Fault 

 at the Mason Road Site,

Fairfield, Solano County,

California, 2006-2009

By

James J. Lienkaemper, Robert R. Sickler,

Shannon A. Mahan, Johnathan Brown,

Liam M. Reidy, and Mindy A. Kimball

2012