Embed Size (px)
Citation preview
CALIFArea of Map
CORRELATION OF MAP UNITS
SURFICIAL DEPOSITS
West of Soquel Creek East of Soquel Creek
West of San Andreas Fault
Unconformity
East of San Andreas Fault
SEDIMENTARY AND VOLCANIC ROCKS SEDIMENTARY ROCKS
QUATERNARY
QUATERNARYAND
TERTIARY (?)
TERTIARY
CRETACEOUS
MESOZOICOR
PALEOZOIC
AGE UNKNOWN
INTRUSIVE AND METAMORPHIC ROCKS
Eocene (?)
Eoceneand
Paleocene
UpperCretaceous
Mioceneand
Oligocene
Plioceneand upperMiocene
Pliocene
Miocene
Oligocene
Eocene
UpperMiocene
Unconformity
Unconformity
MiddleMiocene
LowerMiocene
Paleocene
Pleistocene
Pleistoceneand
Pliocene(?)
Holocene
qd ga gd hcg
sch m
db
Kgs
Kcg
Tms
Tmm
Tmp
Ts
TlssTl
Qtl Qal Qb Qbs
Qes
Qt
Qtl QalQyfQof
Qyfo Qb Qds Qbs Qcf
Qes
Qt Qem
QclQwf
Qof
Qce
QcuQar
Qaf
Qae
QTc
TpTps
Tsc
Tsm
Tm
Tlo
Tla
TzTvq
TslTsr
Tst
Tbu
Tbm
Tbl
Tblc
Tbs
Qcu
Qcl
Felton
Soque
l Cre
ek
SANTA CRUZ COUNTY
PACIFIC
OCEAN
MONTEREY BAY
El Jarro Point
Needle Rock Point
Point Santa Cruz
SoquelCoveSanta
CruzHarbor
Davenport
Boulder Creek
Ben Lomond
20 MILES
35 KILOMETERS30252015
15100
0 5 10
5
12
3
4
Santa Cruz
ScottsValley6
5
78
9
105
Watsonville
AptosSoquel
37°
37°15'
122°15'
122°
121°45'
AnoNuevoBay
Scott C
reek
Bear
Cre
ek
1
9
17
1
1
152
Corralitos
Creek
SanLorenzo
River
9
SOURCES OF DATA
Quaternary deposits nearly entirely from Dupre (1975). Landslides intentionally omitted (see map by Cooper-Clark and Associates, 1975). See maps by Hall and others (1974) and Sarna-Wojcicki and others (1975) for fault hazards. See map by Dupre (1975) for liquefaction hazard and map by McCrory and others (1977) for earthquake intensity zonation. For areas offshore, see McCulloch and others (1977), Hoskins and Griffiths (1971), Greene (1977), and Greene and others (1973). For an interpretation of subsurface basement rocks in the Monterey Bay area, see Ross and Brabb (1973). For analyses of middle and late Tertiary sedimentation and tectonics, see Stanley (1984), and Phillips (1983, 1984a, b).1. Unpublished geologic mapping, scale 1:24,000 by S.A. Brooks and Richard Fiske, Union Oil Company of California, 1956. Additional field work by E.E. Brabb 1969-70.2. Brabb (1960) and Cummings and others (1962). See also report by McJunken (1984).3. Dibblee (1966).4. Brabb and Dibblee (1979), Burchfiel (1958), and Hector (1976).5. Dibblee and Brabb (1978) and Ross (1970).6. Clark (1981), Leo (1961, 1967). Ben Lomond fault extended from map by Stanley and McCaffrey (1983, fig. 3).7. Dibblee and others (1978).8. Dibblee and Brabb (1980), McLauhlin and others (1971), and McLaughlin (1971, 1973).9. Dibblee (1973).10. Dupre (1975).
0
0
10 20 30 40 50 KILOMETERS
10 20 30 MILES
PACIFIC OCEAN
SANTA CRUZ
COUNTY
CHITTE
NDEN
SANTA C
RUZ
SOQUEL
WAT
SONVILLE
EAST
WAT
SONVILLE
WEST
LOS G
ATOS
LOM
A PRIE
TA
ANO NUEVO
BIG B
ASIN
CUPERTINO
FELT
ON
LAUREL
FRANKLI
NPOIN
T
CASTLE R
OCK
RIDGE
MIN
DEGO
HILL
DAVENPORT
MT.
MADONNA
MOSS
LANDIN
G
122°15'122°30' 122° 121°45' 121°30'
37°15'
37°
36°45'
70
60
60
705065
60
70
35
60
30
40
40
80
30
45
46
57
40
5052
40
75
65
60
45
50
70
6880
72
44
45
38
50
70
50
65
65
40
70
68
60
14
15
50
4555
68
10
1030
38
40
50
28
30
32
29 34
32
10
1525
35
30 30
70
60
25
55
27
70
3035
35
10
7060 50
30
30
42
35
35
35
26
30
26
24
20
18 10
14
12
16
5
8
15
6
9
8
28
45
58
80
61
15
5
38
24
25
40
3850
30
25
4530
75
27
15
25
28
60
28
45
30
34
45
5620
3845
8
21
25
35
45
30 17
25
20
20
20
37
17
32
50
30
35
40
11
8
20
22
25
35
453348
46
28
30
40
38
35
35
20
32
55 43
34
47
50
65
30
28
4015
26
11
12 37
25
45
30
10
35
8
152617
50
42 30
32
38
45
25
41
30
40
21
26
14
18
15
11
10
20
2224
4
10
42
40
20
5
30
45
7
12
3
20
27
24
30 30
12
8
25
25
10
3 1010
20
10
40
3
10
30
5
3
254
304
40
5
30
15
20 24
14
5
30
35
13
30
35
10 14
9
423
15
40
35
20
30
20
3
75
48
45
25
28
43
25
1530
20
3440
24
25
3
3060
30
35
25
30 60 35
55
60
60
60
80
35
60
55
85
60
5035
40
60
45
60
65
7565
80
5057
62
50
2080
80
80
70
51
50
65
32
4540
23
25
50
38
40
25
70
6556
48
70
64
80
78
45
73
4570
58
4025
80
52
75
85
45
40
3030
60
47
40
33
31
40
64
18
49
35
48
5452
48
55
2244
43
29
32
78
2733
51
37
13
13
18
11
8
144
23
47
24
33
22
25 15
15
18
21
16
2013
15
17
11
22
6
12
3
5
40
50
6
14
29
13
24 23
22
20
34
45
40
40
25
55
35
60
2
35
60
25
25
50
60
4530
70
85
47
76 75
40
63
6465
80
80
42
3654
50
45
60
70
65
80
84
55
87
82
50
41
51
805436
27
33
20
15
21
24
36
74
40
45
14
14
8
20
18
14
11
3
15
828
6
8
30
45
72
60 75
38
45
52
60
60
45
70
78
7560
60
40
65
64
75
32
15
30
47
60
60
75
55
75
46
60
40 60
45
60
5
27
27
45
30
35
5
3
4
4
10
5
5
10 22
3635
20
3
5
3
2
2
35
3
2
9
2
3
2
80
35
3065
60
4050
50
35
30
30
85
20
60
40
30
30
30
2
57
2510
55
10
25
20
3018
302030
45
4
3
4
3
23
152
63
36 30 54
50
70
4545
7050
7550
40
40
80
28
3540
64
60
7570
40
30
78
70
65
60
50
9
32
47
25
47
1527
30
50
80
35
30
75
40
85
8 82
60
30
25
25
30
30
20
1725
2
5
52 72
50
80
5540
60
50
3550
6070
60
70
75
80
80
40
30
35
34
35
20
42
80
45
30
40
60
77
40 30
20
25
35
15
20
30
36
50
15
5
10
6
35
25
20
2333 37
40
40
40
7540
2045
84
65
30
70
60
80
75
20
22
2545
2325
22
18
65
75
75
70
60
30
30
4750
35
35
20
45
25
25
30
40
40
60
25
45
20 2520
45
30
40
2535
13
40
25
60
75
80
75 2530
40
19
7538
60
1540
55
47
33
15
35
35
45
60
60
30
60
35
34
35
75
30
45
45
3035 10
75
20
45
7
70
40
40
50
50
30
40
50
45
40
6040
30
16
44
18
49
44
60
48
60
55
50
77
50
27
21
80
30
37
30
4830
65
34
16
15
2228
45
53
40 29
55
60
80
60
75
70
50 78
70
80
25
55
25
70
75
30
30
35
45
455045
50
4547
45
50
30
13
60
40
35
46
45
50
80
30
2030
75
7877
50
45
45
82
55
72
5
30
75
60
60
45
40
31
7575
47
84
80
75
60
75
83
83
27 45
40
4550
16
22
30
11
65
60
7570
14
32
45
40
33
20
60
25
65
75
50
60
50
40
66
50
40
80
70
55
70
74 35
60
87
74
40
37
55
36
4035
22
21
80
82
40
65
60
60
40
75
84
80
65
47
35
40 70
50
1018
20
35
30
25
1540
15
45
15
56
5776
61
55
70
20
70
45
40
32
85
50
45
35
81
80
60
34
30
50
80
57
35
45
35
30
30
35
60
10
45
70
25
60
60
37
24
35
16
14
30
20
20
20
45
5
45
20
7
510
20
10
16
18
1035
10
18
25
80
60
6050
50
60
28
30
50
80
87
85
68
50
60
45
80
70
55
80
47
80
60
60
67
70
30
30
30
1055
55
5055
5055
50
45
40
82
80
4559
30
50
45
20
26
5
50
75
35
40
60
1535
75
25
50
20
40
60
25
25
20
85
70
70
65
35
70
60
37
70
6070
85
65
67
60
75
55
30
70
50
85
75
80
80
78
69
80
70
60
30
45
60
74
50
40
18
27
40
SCALE 1:62500
1 .5 0 1 2 3 4 5 MILES
1 .5 0 1 2 3 4 5 KILOMETERS
0 1 2 3 4 5 6 7 8 9 10 11 THOUSAND FEET
GEOLOGIC MAP OF SANTA CRUZ COUNTY, CALIFORNIACompiled byEarl E. Brabb
1997
DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY
This map is a plot derived fromdata contained in the digital databaseOpen-File Report 97-489,"Geologic mapof Santa Cruz County, California:A digital database." A PostScript image of this map is included in the Open-File Report, but the Open-File Report does not contain a paper copy of this map. The Open-File Report consists of the digital data and a pamphlet explaining the database and indicating how to obtain the data from which this map was prepared as well as the PostScriptimage of the map. The pamphlet alsoexplains how those without computers canobtain a plot of this map from a private vendor.
This report is a digital version of a publishedgeologic map by Brabb (1989). The graphicfile part of the report is preliminary and has not been reviewed for conformity with U.S.Geological Survey editorial standards. Anyuse of trade, product, or firm names is fordescriptive purposes only and does not implyendorsement by the U.S. Government.This database, identified as "Geologic Mapof Santa Cruz County, California: A digital database," has been approved forrelease and publication by the Director of the USGS. Although this database has beensubjected to rigorous review and is substantially complete, the USGS reservesthe right to revise the data pursuant tofurther analysis and review. Furthermore,it is released on condition that neitherthe USGS nor the United States Governmentmay be held liable for any damages resulting from its authorized or unauthorized use.
Digital Database Prepared by S. Graham, C. Wentworth, D. Knifong, R. Graymer and J. Blissenbach
36°50'40"122°19'40"
37°17'40"PLOT DERIVED FROM OPEN-FILE REPORT 97-489
36°50'40"121°34'30"
37°17'40"122°19'40"
DAVEN
POR
T
SYNC
LINE
ZAYANTE
FAULT
BIG
BASIN
SYNCLINE
BUTANOANTICLINE
BUTANO
FAULT
SANLORENZO
SYNCLINE
SC
OTTS
VALLEYSYNCLINE
BENLO
MO
ND
FAULT
GLENWOOD
SYNCLINE
SAN
ANDREAS
FAULTZONE
ZAYANTE
FAULT
Base scanned from U.S. GeologicalSurvey San Francisco Bay Region,sheet 3 topographic map (1970)
UTM projection, zone 10
SHEET 1 OF 2
16 1/2°
APPROXIMATE MEANDECLINATION, 1989
TR
UE
NO
RT
H
MA
GN
ET
IC N
OR
TH
Contact - Dashed where approximately located; queried where uncertain
Fault - Dashed where approximately located; dotted where concealed; queried
Anticline - Dashed where approximately located; queried where uncertain
where uncertain. Arrows indicate direction of relative movement
Syncline - Dashed where approximately located; queried where uncertain
Strike and dip of beds
Inclined
Vertical
Horizontal
Overturned
Strike and dip of foliation
80
60
20
Approximate dip of bedding50
