14

15

13

12

14

15

13

12

1413121110987654

1413121110987654meters

Ap/fill(?)

FILL

swirls

swirlsswirlsswirlsswirls

gc ashy siltliqfn.liqfn.dikedikeliqfn.dike

ashyashy

ashyashyashyshellyshellyshellyshellyshellyshelly

shellyshellyshellyshellyshellyshelly

graygrayclayclaygrayclay

graygrayclayclaygrayclay

k

01A10

dz

dzE4

E6

E2

E3

E1

BSCBSCBSC1BSC1BSCBSCBSC1

BSCBSCBSC2BSC2BSCBSCBSC2BSC2BSC2

BSCBSCBSC2BSC2BSCBSCBSC3BSC3BSCBSCBSC2BSC2BSCBSCBSC3

S1

C1

S4

S2

C4

C3

C2

S3

oscoscosc u80

u95

u90u92

u125

u120

u140

u300

u350

u400

u450

u500

u550

u130

u135

u250

u200

u110

u70

u80

u50

u63

u61

block

cl st

cl st

cl st

sd st

sd storange sd st

gray cl st

bn cl st

disturbed

disturbed

distur-bed

TRENCH 01A NORTH WALL

u45

u41

u31

u20

E5

E8

E8

E9

E10

E11

01A01

u100

E7

West East

14 13 12 11 10 89 7 6 5 4

14

13

12

meters

15

14

13

12

15

14 13 12 11 10 89 7 6 5 4

?

? ??

??

???

01A0301A04

01A06

01A02

01A07

01A09

01A08

01A05

East West

kk?

k

plastic

FILL

swirlsswirls

swirls

swirls

swirls

swirls

swirls

swirls

swirls

gc

ashy silt

liqfn.liqfn.dikedikeliqfn.dike

ashy

ashyashy

ashy

ashy

grayclay

shellyshellyshelly

shellyshelly

shelly

k

E4

E6

E7

E8

E8

E9

E10

E11

E5

E2

E3

E1

S1

C1

S4

S2

C4

C3

C2

S3

oscoscosc u80

u100u95

u90u92

u125

u140

u300

u350

u400

u450

u500

u550

u130

u135

u250

u200

u110

u80

u50

u20

u41

u63

u61

gc

gc

gc

u31

u45

u70

BSCBSCBSC1BSC1BSCBSCBSC1

BSCBSCBSC1BSC1BSCBSCBSC2BSC2BSCBSCBSC1BSC1BSCBSCBSC2

BSCBSCBSC1BSC1BSCBSCBSC3BSC3BSCBSCBSC1BSC1BSCBSCBSC3

sd cl st sd cl st

cl stcl st

cl st

highly

disturbed

disturbed

TRENCH 01A SOUTH WALL

U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY

OPEN-FILE REPORT 03-488Sheet 1 of 8, Version 3.0

Pamphlet accompanies map

2003

By

This map was printed on an electronic plotter directly from digital files. Dimensional calibration may vary between electronic plotters andbetween X and Y directions on the same plotter, and paper may change size due to atmospheric conditions; therefore, scale andproportions may not be true on plots of this map.

Available on World Wide Web at http://pubs.usgs.gov/of/2003/of03-488/

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 December 22, 2003

James J. Lienkaemper, Patrick L. Williams, Timothy E. Dawson, Stephen F. Personius,Gordon G. Seitz, Samuel J. Heller and David P. Schwartz

7 FEET1 10 2 3 4 5 6

.5 1 METER1 0

LOGS AND DATA FROM TRENCHES ACROSS THE HAYWARD FAULT AT TYSON'S LAGOON(TULE POND), FREMONT, ALAMEDA COUNTY, CALIFORNIA, 2001-2003

Organic clayey silt

Blocky scarp colluvium

Blocky scarp colluvium

Blocky scarp colluvium

Organic clayey silt

u400

u300

BSC2

BSC1

u200

EXPLANATION

Organic clayey silt

Orange silty clay*

Contact––Dashed, approximate; dotted, inferredFault––Dashed, approximate; dotted, inferred

Event horizon

Unit number

Krotovina––infilled burrow

Minor shearFissure or crack––Open or filled voids without distinguishable slip, possibly tectonic in origin

Radiocarbon sample location–– rectangle indicates bulk samples

u80

u80

00A21

A3

ABBREVIATIONS

k

bsc

cl

gc

gv

m

sd

st

rk

blocky scarp colluvium

clay

gray clay

gravel

medium

sand

silt

rock

Banded brown clays & silts

Charcoal-rich sand

Banded organic siltyclay with charcoal

Dark brown clayey silt

Interbedded sands and clays

u70(cd)

u61(h)

u41(p)

Dark brown clayey siltu31(qr)

Yellow brown sandy siltu20(stu)

u45(j-o)

u50(i)