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Fossil localities, with collection number

Chevron USGS

early to middle Miocene

middle Miocene

middle to late Miocene

late Miocene

Miocene

early Miocene

Oligocene to recent

Late Cretaceous

Cretaceous

Barren or indeterminate

Paleocene

probably Eocene or older

Estimated Age

3000

7000

121°0'0"W

121°0'0"W

121°7'30"W

121°7'30"W

121°15'0"W

121°15'0"W

121°22'30"W

121°22'30"W

121°30'0"W

121°30'0"W

121°37'30"W

121°37'30"W

36°0'0"N 36°0'0"N

35°52'30"N 35°52'30"N

35°45'0"N 35°45'0"N

35°37'30"N 35°37'30"N

35°30'0"N 35°30'0"N

NORTH AMERICAN DATUM 1983

CONTOUR INTERVAL 40 FEET

1 0 1 2 3 4 5 6 7 8 MILES

1 0 1 2 3 4 5 6 7 8 9 10 KILOMETERS

SCALE 1:100 000

CALIF.

MAP LOCATION

Holocene

Pleistocene

Pliocene

Miocene

Late

Early

Oligocene

Eocene

Paleocene

CORRELATION OF MAP UNITS

[See Description of Map Units (in pamphlet) for precise unit ages. Dashed line indicates protolith]

QUATERNARY SURFICIAL DEPOSITS

Qs

Correlation of terraces across fault zones is tentative;

ages are based on dated surfaces or estimates of

local uplift rates. Terraces are grouped by fault zone:

1 - Found SW of San Simeon Fault Zone

2 - Found SW of Oceanic Fault Zone

3 - Found between strands of Oceanic Fault

Query (?) indicates significant uncertainty in

age range.

EARLY QUATERNARY AND TERTIARY STRATA

QTcs

QTcb

Tpm

Tps

Kep Kepc

TKsic

Kscc

SALINIAN BLOCK

BASEMENT COMPLEXES

Kfm

KJt

Jch

Jo Jv Jdb Jgb

Kac

FRANCISCAN COMPLEX GREAT VALLEY COMPLEX

Coast Range Ophiolite

Great Valley Sequence

BASEMENT COMPLEX

Jsp

Cambria Terrane

Km Kmm

Tmv

KJtc

KJfg KJfb

KJfv

KJfc

QUATERNARY

TERTIARY

CRETACEOUS

JURASSIC

TRIASSIC

PALEOZOIC

late

early

middle

MESOZOIC

CENOZOIC

Maastrichtian

Qmtos

Qmtlc

Qmtsr Qmtdp

Qmtbb

Qmtok

Qmtvg

Qmtcb

Qmtcm

Qmtss

Qmttr

1 2 3

?

?

?

?

{

{

{

PIEDRAS BLANCAS BLOCK SANTA LUCIA RANGE BLOCK SAN ANTONIO BLOCK

Tv Tv

Tm

Tl

Ku

Kmm

Km

Kfg

Ka

Ts

Tm

Tl

Qls Qal

Qoa Qt Qmt

QTp

Tu

Tpa

TKsi

Ksc

Kif

Tls

Td

Tm

Tc

EXPLANATION OF

GEOPHYSICAL SYMBOLS

Aeromagnetic Anomaly Contours

Contour interval, 20 nT. Hachures

indicate magnetic low. Contours

were computer generated based

on a 200-m grid. Red circles are

magnetization boundaries automatically

calculated from grid; larger circles

indicate greater than average magnitude

of magnetic potential gradient. Smaller

circles indicate less than average

magnitude of magnetic potential gradient.

[See pamphlet for more information

about data aquisition and processing.]

EXPLANATION OF

GEOPHYSICAL SYMBOLS

[See pamphlet for more information

about data aquisition and processing]

Gravity Anomaly Contours

Contour interval, 2 mGal. Hachures

indicate gravity low. Contours were

computer generated based on a 300-m

grid. Red circles are density boundaries

automatically calculated from grid; larger

circles indicate greater than average

magnitude of gravity gradient. Smaller

circles indicate less than average magnitude

of gravity gradient.

Gravity Station Location/Source

Defense Mapping Agency

Offshore data from DNAG 6-km grid

Previous data from CDMG

PACES, January 2010

0

80

-20

-10

nT

425

400

375

350

325

300

275

250

225

200

150

125

100

75

50

25

0

-25

-50

175

450+

-75

mGal

20

16

12

8

4

0

-4

-8

-12

-16

-20

-24

-28

-32

-36

-40

-44

-48

-52

-56

24

APPROXIMATE MEAN

DECLINATION 2014

TRUE NORTH

MAGNETIC NORTH

13 1 o

2/

LIST OF MAP UNITS

Alluvial fan and fluvial deposits (Quaternary)

Landslide deposits (Quaternary)

Older alluvium (Pleistocene)

Beach and dune sand (Holocene)

Fluvial terrace deposits (Pleistocene)

San Simeon terrace (Late Pleistocene)

Tripod terrace (Late Pleistocene)

Oso terrace (Middle Pleistocene?)

Cambria terrace (Middle Pleistocene)

La Cruz terrace (Middle Pleistocene)

Scott Rock terrace (Middle Pleistocene)

Del Puerto terrace (Middle Pleistocene)

B.B. terrace (Middle Pleistocene)

Oak Knoll terrace (Middle Pleistocene)

Van Gordon terrace (Middle Pleistocene)

Cinnabar terrace (Middle Pleistocene)

QUATERNARY SURFICIAL DEPOSITS

EARLY QUATERNARY AND TERTIARY STRATA

Piedras Altas Formation (Paleogene)

Sur series metamorphic rocks and granitic rocks, undifferentiated (Cretaceous)

Sur series metamorphic rocks, marble member

BASEMENT COMPLEXES

SALINIAN COMPLEX

Shut-in Formation, conglomerate and sandstone member

Italian Flat Formation (latest Cretaceous, Maastrichtian)

Steve Creek Formation (latest Cretaceous, Maastrichtian)

Steve Creek Formation, conglomerate and sandstone member

El Piojo Formation (latest Cretaceous, Maastrichtian)

El Piojo Formation, conglomerate member

Unnamed strata (latest Cretaceous, Maastrichtian)

GREAT VALLEY COMPLEX

Coast Range Ophiolite

Great Valley Sequence

Mélange (Late Cretaceous)

FRANCISCAN COMPLEX

Sandstone of Cambria (Late Cretaceous)

SAN ANTONIO BLOCK

SANTA LUCIA RANGE BLOCK

PIEDRAS BLANCAS BLOCK

EXPLANATION OF MAP SYMBOLS

Approximate

Horizontal

Inclined

Overturned, top known from local features

Top known from local features

Vertical

Strike and Dip of Bedding

Strike and Dip of Foliation

Foliation and bedding

Crinkled

Foliation parallel to bedding

Vertical

Inclined

Approximate

Orientation of Joints

Vertical

Inclined

Undifferentiated marine terrace deposits (Pleistocene)

Shut-in Formation (Paleocene and latest Cretaceous, Maastrichtian)

Thrust or reverse fault Sawteeth on upper plate

Cambria Terrane

Unnamed Disrupted Terrane(s)

37

17

31

25

10

30

30

12

20

20

Dashed where approximate; dotted where

concealed

Contact

Faults Dashed where approximate; dotted where

concealed

Dashed where approximate; dotted where

concealed

Folds

Syncline

Anticline

Tpa

Km

Kmm

TKsic

Kif

Ksc

Kscc

Kep

Kepc

Ku

Kfm

Kfg

TKsi

Qal

Qls

Qs

Qoa

Qt

Qmt

Qmtos

Qmtss

Qmttr

Qmtlc

Qmtcm

Qmtsr

Qmtdp

Qmtok

Qmtvg

Qmtcb

Qmtbb

Tpm

Tps

Tmv

Tls

Tc

Ts

Tm

Tl

Tm

Tv

Tl

QTcs

QTcb

Td

Tu

Tm

QTp

Tv

Ka

Kac

Jch

Jsp

Jo

Jv

KJfc

KJfv

KJfb

Jdb

Jgb

KJfg

KJt

KJtc

[See Description of Map Units (in pamphlet) for complete unit descriptions.

Some unit exposures on the printed or plotted map are too small to

distinguish the color for unit identification. These units are labeled where

possible, and unlabeled units are attributed in the database]

Chert (Late Jurassic)

Serpentinite

Undifferentiated ophiolitic rocks (Middle and Late Jurassic)

Gabbro

Mafic volcanic rocks

Diabase and diorite

Atascadero Formation (Late Cretaceous)

Atascadero Formation, conglomerate member

Toro Formation (Early Cretaceous and Late Jurassic)

Toro Formation, conglomerate member

Chert (Cretaceous and Jurassic)

Mafic volcanic rocks (Cretaceous? and Jurassic)

Broken formation (Cretaceous and Jurassic?)

Sandstone (Cretaceous and Jurassic?)

Mudstone member

Sandstone and conglomerate member

Monterey Formation, volcanic member

Limestone (early Miocene or Oligocene?)

Cambria Felsite (Oligocene)

Dacite (Oligocene?)

Monterey Formation (early and middle Miocene)

Vaqueros Sandstone (early Miocene and late Oligocene?)

Lospe Formation (Oligocene)

Sedimentary rocks of Crystal Knob (Pleistocene or Pliocene)

Basalt of Crystal Knob (Pleistocene or Pliocene)

Pismo Formation (early Pliocene and late Miocene)

Unnamed sandstone and conglomerate (Pliocene)

Monterey Formation (late Miocene)

Lospe Formation (early Miocene)

Unnamed sandstone (early Pliocene and late Miocene?)

Monterey Formation (Miocene)

Paso Robles Formation (Pleistocene and (or) Pliocene)

Vaqueros Sandstone (early Miocene and (or) late Oligocene)

INDEX TO GEOLOGIC MAPPING

1. Seiders and others (1983); Gilbert (1971); Page (1970); unpublished

mapping by Seiders

2. Page (1970); Burch (1968); Loney and others (1971); unpublished

mapping by Seiders

3. Durham (1965, 1974); Dibblee (1971); Burch (1968); Loney and

others (1971)

4. Unpublished mapping by Seiders

5. Seiders (1989b); Hall (1976); Hall and others (1979); Burch (1968);

Loney and others (1971); CDMG (1986a); Hanson and others (1994)

6. Seiders (1989a); Dibblee (1971); Burch (1968); Loney and others (1971)

7. Unpublished mapping by Seiders; Dibblee (1971); Page (1970)

8. Hall (1976); Hall and others (1979); CDMG (1986b,c); Hanson and

others (1994)

9. Hall (1976); Hall and others (1979); unpublished mapping by Seiders;

Page (1970)

10. Hall (1976); Hall and others (1979)

11. Weber (1983); Hanson and others (1994)

1 2 3

4

5 6 7

8 9

11

10

http://dx.doi.org/10.3133/sim3287

Pamphlet accompanies map