FM

M

.M

M

M

F(

M

F(

(

(

(

(

(

(F

F

F. FFFF

M.F

F

.(

.

F

(

(

M

F

F

F

F(

(

F

F

F

M

(

(

(

(

(

((

M

M

M

F M

MM MF

FM

MFMMMFM

((

(FM

M F

F F(

(FMMFM

F M FFM

MM(

.

FMFM

... FMFMF M

.

. F

( FF 4

4

4

MFMMFFMFM

F

MFFF

.

.

FMFMF

(MFM

.

M

F

MFM

M

FM

M

4

4

4

M

F

M

M

F

F

.

.F

.

.

F

MMF

.

F

(

(

(

(

(

. F

.

.

F

.M.

FF

FM

FFMM.MF

4

4

4

4

4

MF

F

4

4

M

FF

F

FMF

.

F M F

FF

MFM

M

MF

F

4

4

4

4

4

F

F

.

.

.

.

.

.

..

..

..

.

F

F

. M

F

F

.

F

M

M

F M

F F MF

F

4

4F F

MFM

F

. F

4

4

M

4

F4

4

4F.

M F

FMF

F

M

.

.

M

F

(

F

MFM

F

F

F

M

F

.

F

F F M.F M

FM

M

(F

F

M

F

.

.

.

F

.

MF

FF

F

M

F

F

FMF

FMMF

4

FF

FFMF M M

FFFM

MFMF

FF

44

FM4

4

4

FFF

.

.

F

F F F

4

4FM F

.

.

F

M

MM F

FM F

.

.

F

.

.

M FM

..

M

.

.

.

F

FF

F M FMM

M

FF

F

MM FMF FMF .

M

F

F

M (

M FM

FMFFFM

M

F

M.

.

FM

4

.

(

F F

FFM MF

FMF

F

FMF F

MFFMF

M

FM FF M M F M

MF M

F

FM

F

F MF

MM

F

F

MFM

FF

F

M

F

F

(

(

F M

M

F

.

F

F

F

.

MF

F

F

FFF MF

.

(

M

4

M

F F

4M

4

4

F4

F

FF

F

F

4

MMF

FFM

FF

MM

F

(

FFF

FM

F

M M

F

M

FFF

MM

MM

M

.

(

(

M

MM

MF

FF

M

F

F((

.

MM

4

M (FM

FF

F

.

.

.

(

(

(

"

"

"

"

"

"

"

"

"

"

"

" "

"

"

"

"

"

"

"

"

"

"

"

"

"

"

"

"

"

"

"

"

"

"

"

MMM

MM

M

M MM

MM

MMM

M

MMM

M M

MM M

MM

MM

M

M

SCALE 1: 200 00050 10 20 30 KILOMETERS

UD

. .

FM

KA A'

EXPLANATIONPrimary Faults

Primary—Trace of Hosgri Fault Zone with relative vertical and strike-slip displace-ments, indicated by letters and arrows

High angle—Relative vertical displacement shown; U = up, D = down

Low angle—Barb on upthrown plate

FoldsAxis of major fold structures

Other

Secondary structuresFaults and folds—Dashed where lateral continuity is inferred

Solid lines or long dashes—Indicate structures that deform the early-late Pliocene unconformity

Short dashes—Indicate structures that do not deform the early-late Pliocene unconformity

Areas of Pliocene and older bedrock outcrops on the seafloor—Mapped from sidescan sonar and high resolution subbottom profile surveys

Location of illustrated seismic profiles

Petroleum company wells

Coordinate System is NAD 83, UTM Zone 10 in Meters.

0 100 Kilometers

PACIFIC OCEAN

Area of Plate

125°0'0"W 120°0'0"W 115°0'0"W

125°0'0"W 120°0'0"W 115°0'0"W

40°0'0"N

35°0'0"N

30°0'0"N

40°0'0"N

35°0'0"N

30°0'0"N

C a l i f o r n i a

PACIFIC

OCEAN

MorroBay

EsteroBay

San LuisObispo Bay

UD UD

UD

UD

UD

UD

UD

UD

U D

U D

U D

U D

U D

DU

UDD

U

UD

UD

UD

UD

UD

DU

DU

UD

UD

DU

DU

DU D

U

DU

DU

DU

DU

DU

DU

DU

DU

DU

DU

DU

DU

D

UDU

D

UD

IH

G

F

E

D

C

B

A

I'

H'

G'

F'E'

C'

C"

B'

A'

C"'

PB2

M

L

K

J

NTSS

M'

L'

K'

J'

PB1

NT'

SS'

PB1'

PB2'

D'

Point Buchon

Point Estero

Ragged Point

Cambria

Cape San Martin

San Simeon Point

Point SanLuis

PurisimaPoint

Point Sal

Point Pedernales

PointArguello

PointPiedrasBlancas

422-1

416-1

415-2

415-1

409-4409-3

402-1

397-2

397-1

396-1

395-1 060-1

496-1

444-1

443-2

443-1

440-2

440-1

435-1434-1

430-1

427-1426-1

425-2425-1

424-1

413-1

411-1

406-1

HO

S GR I F A

UL T Z O

NE

HO

SG

RI

F AU

L T

ZO

NE

LOS OSOS

FAULT ZONE

PIEDRAS BLANCAS ANTIFORM

SAN SIMEON FAULT ZONE

PECHO FAULT

N. PECHO FAULT

S. PECHO FAULT

CASMALIA FAULT ZONE

LION’S HEAD FAULT

PURISIMA

STRUCTURE

LOMPOC

STRUCTURE

OLSON

FAULTSAN LUIS BAY

FAULT

WILMAR AVENUE

FAULTLOS BERROS FAULT

OCEANO FAULT

121°30'0"W650000

121°0'0"W700000

120°30'0"W

121°30'0"W650000

121°0'0"W700000

3950000

35°30'0"N

3900000

35°0'0"N

3850000

3950000

35°30'0"N

3900000

35°0'0"N

3850000

Bulletin 1995–CCPlate 4 of 7

U.S. Department of the InteriorU.S. Geological Survey

Structural Trend Map of the Hosgri Fault Zone,Eastern Offshore Santa Maria Basin

ByC. Richard Willingham, Jan D. Rietman, Ronald G. Heck, and William R. Lettis

2013

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

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.

Digital files available at http://pubs.usgs.gov/bul/1995/cc/

Suggested Citation: Willingham, C.R., Rietman, J.D., Heck R.G., and Lettis, W.R., 2013, Characterization of the Hosgri Fault Zone and adjacent structures in the offshore Santa Maria Basin, south-central California: U.S. Geological Survey Bulletin 1995-CC, scale 1:200,000 [http://pubs.usgs.gov/bul/1995/cc/].