AUL T

A'' B'

BA

A'

30

3

10

11

17

19

24

20

33

18

22

8

18

2023

17

10

18

24

37

27

28

32

7

1880

7830

55

80

80

31

23

23

77

58

45

64 70

51

28

40

10

4 13

41

53 31

7372

68

4543

40

7543 40

41

4034

15

37

19

25 33

23

63

82

70

32

30

68

4742

37 56

25

15

62

53

21

565

5038

43

3577

33

20

20

1835

687

22

4015

36

27

19

14

7565

35 58

17

38

35

6

22

80

58

21

12

24

10

6

45

30

5

42

17

35

22

37

19

1815

70

25

16

61

70

32

40

6048

70 85

5

13

74

73

7324

54

462

85 7215

70

4543

7

3

6

24

5

52

11

86

57

23

10

1888

84

57

40

57

36

53

58

4032

25

36

33

12

8

15

8

64

3

7

20

27

18

30

48

24

7836 78

12

46

10

22

38

82

8673 38

60

75

37

19

25

26

7068 62

60

78

47

37

25

645

50

28 35

3053 19

20

42

2219

53

6251

23

50

86

45

6

10

39

12

37

32

78

49

45

50

37

33

25

31

316

805

33

30 3

8910

55

497 38

2153

51

60

74

10

2

14

12

25

3144

4248

35

35

40

40

47 32

2710

40

13

13

4221

33

15

18

30

20

35

30

33

9

2050

23

40

34

3530

25

35

33

40

35

30

32

32

25

50

35

35

40

40

15

12

16

21

51

1989

45

80

41

34

50

50

52

28

63

32

2023

80

27

38

60

37

22

28

28

64

23

60

8

14

9

40

35

25

40

25

15

8

15

15

30

25

17

32

20

15

45

35

35

35

33

35

35

23

45

30

52

24

32

15

33

62

13

7322

14

61

70

53

25

58

25

40

50

39

40

38

56

36

51

25

13

33

75 43

40 34

25

82

30

35

T c a u

Q a c

Q m a c

T c c

T c g

T c g

T q c

T q b

T m

T c a l

T c a u

T q b

T c c

Q a

Q o a

T c c

T c cQ l s

T c c

T p s

T p l T p l

T p l

T p b

T p b

T p s

T p s

T p b n

T p sT p s

T p b

T p s

Q m a c

T c v T m

T p b

T p s

Q o a

Q o a

T c v

T l c

T c a u

T q b

T c cT c a u

T c p

T q cT q b

T q b

T q b

Q a c

Q a c

Q a c

Q o a

Q o a

T c v

T c v

Q m a c

T l c

T l c

Q m a c

Q m a cT c v

T c v

Q m a c

T c p

T j s h

T c v

T c v

T c v

T c v

Q m a c

Q m a c

Q m a

Q m a c

T c a u

T c v

T c pT c p

T p b

T c c

T c vT c v

T j s h

Q o a

T c v

Q o aT m

Q o a

Q a c

T q b

Q m a c

T q b

T q b

T j s h

T j s h

T j s

T j m

Q m a

Q m aQ m a

T c l

T c l

Q o l s

Q l s

Q l s

T j s

T j s

Q b d

Q b d

Q b d

Q b d

Q b d

Q b d

T c g

Q o a c

T l c

T c c

T r d

T r d

T r d

Q a

Q o a

T j s h

T j s h

Q o a

Q o a

Q o a

T j s h

T j s h

T j c

T j s h

T j s h

Q m aQ m a

T j s h

Q y a

T j s

T m a

T j s

Q l s

Q l s

T j m

Q m a

Q a c

Q l s

Q l s

T j m

T j m

T m a

T j s h

T j s h

T j s h

Q m a

T j s

Q m a

Q m a c

T m a

T j s

T j m

T j m

T j m

Q a c

T j m

T j m

T m a

T m a

T m a m

T j s

Q a c

Q a c

Q a c

Q a c

Q m a c

Q m a

Q l s

T j s h

T j s h

T j m

Q a c

T j m

T j m

T j s

T j m

T j s

T j s

T j s

T j s h

T r d

T r d

T j s h

T m a

T m a

T m a

T m a

T m a

T m aT m a m

T m a m

T m a m

T c d

T c d

T c d

T c d

T c d sT c d s

T c d s

T m a

T m a m

T c dT m a m

T m a

T m a m

T r d

T j s

T j s

T j s h

T m

T m

T m

T j m

T j s

T j s

T j m

T j m

T j m

T j s h

T j s h

T j m

Q o a c

T j m

T c c

Q y a

Q y a

Q y a

Q y a

Q a

Q y a

Q a

Q a

Q a

T c g

T c c

T j s

T j s

T j s h

T j s

T c g

T j m

T j s

UNCONFORMITY

UNCONFORMITY

UNCONFORMITY

LOCAL UNCONFORMITY

Holocene

Pleistocene

Oligocene

Eocene

Pliocene

Miocene

??

??

QUATERNARY

TERTIARY

?

LOCAL UNCONFORMITY

CORRELATION OF MAP UNITS

Contact--Long-dashed where approximately located; short-dashed where inferred;

invisible where arbitrarily located or conjectural

Fault--Long-dashed where approximately located; short-dashed where inferred; dotted

where concealed; ball and bar on apparent downthrown side; pair of opposing arrows

show sense of strike-slip component of movement; tic shows direction and amount of

dip; arrow shows trend and plunge of slickenside striae

Thrust fault or moderately dipping reverse fault--Long-dashed where approximately

located; short-dashed where inferred; dotted where concealed; sawteeth on upthrown

block; tic shows direction and amount of dip; arrow shows trend and plunge of

slickenside striae

Shear zone

Fold axial traces--Dashed where approximately located or inferred; dotted where

concealed; solid arrows show direction of plunge of fold axes

Anticline

Upright

Overturned

Syncline

Upright

Overturned

Marker beds

Sandstone

Conglomerate

Landslide headwall scarp--hachures on slide block

Strike and dip of beds

Inclined

Horizontal

Overturned

Approximate

Strike and dip of beds (after Dibblee, 1979)

Drill hole

EXPLANATION OF MAP SYMBOLS

Modern alluvium (Holocene)

Modern and young alluvium and colluvium (Holocene and Pleistocene?)

Landslide deposits (Holocene and Pleistocene?)

Young alluvium (Holocene and Pleistocene?)

Middle alluvium (Pleistocene)

Middle alluvium and colluvium (Pleistocene)

Old alluvium (Pleistocene)

Old alluvium and colluvium (Pleistocene)

Old landslide deposit (Pleistocene)

Boulder diamicton (Pleistocene)

Morales Formation (Pliocene?)

Juncal Formation (Eocene)

Sandstone facies

Interbedded sandstone, siltstone, and shale facies

Siltstone and shale facies

Conglomerate facies

Matilija Sandstone (Eocene)

Interbedded sandstone and shale facies

Sandstone facies

Cozy Dell Shale (Eocene)

Rhyolitic dikes (Oligocene)

Gneissic breccia facies

Lacustrine facies

Arkosic sandstone facies

Breccia facies

Plush Ranch Formation (Miocene and Oligocene?)

Quatal Formation (Pliocene?)

Fluvial sedimentary rocks

Calcareous sandstone and diatomite

Lockwood Clay (Pliocene?)

Caliente Formation (Miocene)

Upper arkosic-lithic sandstone facies

Conglomerate facies

Variegated sedimentary facies

Clay-rich sedimentary facies

Granitic fanglomerate facies

Lower arkosic sandstone and breccia facies

Basal breccia facies

MAP UNITS

PRELIMINARY GEOLOGIC MAP OF THE SAN GUILLERMO MOUNTAIN QUADRANGLE,VENTURA COUNTY, CALIFORNIA

By

Scott A. MinorVersion 1.0

1999

This map is preliminary and has not been reviewed for conformitywith U.S. Geological Survey editorial standards or with theNorth American Stratigraphic code.North American Datum of 1927 (NAD 27). Projection and10 000-foot grid ticks: California Coordinate System, zone 5(Lambert Conformal Conic). 1000-meter Universal TransverseMercator grid, zone 11

Geology mapped by S.A. Minor 1996-1998.Digital compilation by S.A. Minor, O. Young,

and T. Brandt.

OPEN FILE REPORT 99-032U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY

CONTOUR INTERVAL 40 FEET

NATIONAL GEODETIC VERTICAL DATUM OF 1929

PIEDRA

SYNCLINE

BLANCA

B IG

P I N E

LOCK

WOOD

VALLEY

F AU L

T

F

ZONE

SCALE 1: 24 0001 MILE1 1/ 2 0

7000 FEET1000 10000 2000 3000 4000 5000 6000

.5 1 KILOMETER1 0

14

APPROXIMATE MEANDECLINATION, 1991

TRU

E N

OR

TH

MA

GN

ETIC

NO

RTH

QUADRANGLE LOCATION

CALIF

T c p

T c a l

T c g

T c l

T c v

T c c

T c a u

T l c

T q c

T q b

T m

Q b d

Q o l s

Q o a c

Q o a

Q m a c

Q m a

Q y a

Q l s

Q a c

Q a

T j s

T j mT j s h

T j c

T m a T m a m

T c d T c d s

T p s T p l

T p b n

T p b

T c a l T c c

T c p

T c g

T c cT c v

T c a u

T l c

T c l

T q b

T q c

T m

Q o a

Q m a

Q y a

Q a

Q o a c

Q m a c

Q a c

Q b dQ o l s

Q l s

T r d

T p b

T p s

T p l

T p b n

T c d

T c d s

T m a

T m a m

T j s

T j m

T j s h

T j c

T r d

San Guillermo Mountain quadrangle

NACIMIENTO FAULT

BIG

Cuyama Valley

PINE

San Rafael Mtns.

Sierra Madre Mtns.

HILDRETHFAULT MUNS

ON CREEK FAULT

FAUL

T

Cuyam

a River

Cuyama

Badlands

SAN

ANDREAS

FAULT

San Emigdio Mtns.

Mt. Pinos

Lockw

ood V

alley Frazier

Mtn.

0 5 10 15 KM

PINEMOUNTAIN

FAULT

OZENA

FAULT

119˚ 00'119˚ 30'

119˚ 00'119˚ 30'

34˚45'

34˚45'

TECTONIC INDEX MAP

gneissic and granitic basement rocks?

WAGON ROADCANYON

BE

ND

IN

AlamoCreek

A

Beartrap

Creek

PIEDRA BLANCA

SYNCLINE

PINE

MOUNTAIN

A'

2000

3000

4000

5000

6000

7000

FEET

BIG

PIN

E F

AU

LT

LOC

KW

OO

D V

ALL

EY F

AU

LT

SE

CT

ION

A''

? ??

??

?

?

?

??

gneissic and granitic basement rocks?

B

Cedar

Creek

Piru

Creek

SAN GUILLERMO

MOUNTAIN

BIG PINE F

AULT

LOC

KW

OO

D V

ALLEY

FAU

LT Z

ON

E

B'

7000

6000

5000

4000

3000

2000

1000

FEET

?

?

?

??

?

? ?

6000

5000

4000

3000

2000

FEET

2000

1000

3000

4000

5000

6000

7000

FEET

T c d s

T c d

T c d

T c d

T m a m

Q a c

T m a

Q m a

T m aT j s h

T j sT j m T j m

T j m

T j s

T j s h

T c a u

T c v

T c c T p b

T p s

T p s

T c gT c c

T p l

T p l

T p b

Q o a

T c vT r c

T c g ?T j s

T j s h

T j s h

T j s h

T j s hT j m

T j s h

T j s hT j s hT j s

T m aT m aT j s h

T j s

T j s h

T j s h

T j s

T j s

T j c

Q y a

T j s h

T j s h

T j s

T j s h

Q y a Q a Q m a

T j s h

T j s h

T j cQ y a

T j c

T j s h

T j s h

T j s

T c g

T j s

T j s h

T c g

T j ?

T c g ?T c v

T c a u

T q b

T c v T l c

T c c

T c a u

T q b

T c v T c a uT c c

T c p T p b

T p s

T p b

T p sQ b d