Online Links:
| Value | Definition |
|---|---|
| H2O | Body of water |
| LS | Landslide deposit |
| br | Undifferentiated bedrock |
| dam | Location of dam |
| unmapped | Unmapped area |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 910 |
| Value | Definition |
|---|---|
| LS | Location of landslide deposit |
| (blank) | Not a landslide deposit |
| Value | Definition |
|---|---|
| Mz | Mesozoic |
| Q | Quaternary |
| QT | Quaternary-Tertiary |
| Tl | Lower Tertiary |
| Tu | Upper Tertiary |
| h | Holocene |
| p | Pleistocene |
| (blank) | Age unknown |
| Value | Definition |
|---|---|
| bv | mafic volcanic rocks |
| fv | Felsic volcanic rocks |
| gr | granitic rock |
| ls | limestone |
| m | mud and silt |
| md | Mudstone and shale, some sandstone |
| mm | Sheared sandstone and shale (melange) |
| ms | Low-grade metasandstone and shale |
| mv | Low-grade metavolcanic rocks (greenstone) |
| s | Sand, gravel, silt, and mud |
| sc | Silica-carbonate rock |
| sch | Schist |
| sl | Porcellaneous or siliceous mudstone and shale; chert |
| sm | Sandstone and mudstone or shale |
| sp | Serpentinite |
| ss | Sandstone and conglomerate, some mudstone or shale |
| wm | Soft, water-saturated mud, some silt |
| Value | Definition |
|---|---|
| 0 | unknown |
| 1 | unnamed or no name reported |
| 2 | Alum Rock Rhyolite |
| 3 | Aromas sand |
| 4 | Bay mud |
| 5 | Briones sandstone |
| 6 | Butano sandstone |
| 7 | Cierbo sandstone |
| 8 | Claremont shale |
| 9 | Colma formation |
| 10 | Franciscan complex |
| 11 | Great valley sequence |
| 12 | Hambre sandstone |
| 13 | Joaquin Miller formation |
| 14 | Knoxville formation |
| 15 | Lambert shale |
| 16 | Lambert shale and San Lorenzo formation, undivided |
| 17 | Leona rhyolite |
| 18 | Locatelli formation |
| 19 | Lompico sandstone |
| 20 | Markley formation |
| 21 | Merced formation |
| 22 | Merritt sandstone |
| 23 | Mindego basalt |
| 24 | Monterey formation |
| 25 | Monterey group |
| 26 | Monterey shale |
| 27 | Moraga formation |
| 28 | Mullholland formation |
| 29 | Neroly sandstone |
| 30 | Oakland conglomerate |
| 31 | Orinda formation |
| 32 | Oursan sandstone |
| 33 | Page Mill basalt |
| 34 | Pigeon Point formation |
| 35 | Pinehurst shale |
| 36 | Purisima formation |
| 37 | Redwood canyon formation |
| 38 | Rices mudstone member, San Lorenzo formation |
| 39 | Rodeo shale |
| 40 | San Lorenzo formation |
| 41 | San Pablo group |
| 42 | San Ramon sandstone |
| 43 | Santa Clara, Livermore, or Packwood gravels |
| 44 | Santa Cruz mudstone |
| 45 | Santa Margarita sandstone |
| 46 | Shephard Creek formation |
| 47 | Siesta formation |
| 48 | Sobrante sandstone |
| 49 | Temblor sandstone |
| 50 | Tice shale |
| 51 | Tolman formation |
| 52 | Twobar shale member, San Lorenzo formation |
| 53 | Vaqueros sandstone |
| 54 | Zayante sandstone |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 910 |
| Value | Definition |
|---|---|
| contact, approx. located | Contact whose position is not precisely known |
| contact, certain | Observed contact |
| contact, concealed | Concealed contact whose position is inferred |
| contact, inferred | Contact whose position is inferred |
| contact, inferred, queried | Contact whose position is inferred and questionable |
| fault, approx. located | Fault whose position is not precisely known |
| fault, certain | Observed fault |
| fault, concealed | Concealed fault whose position is inferred |
| fault, inferred, queried | Fault whose position is inferred and questionable |
| map boundary | Boundary of mapped area |
| scratch boundary | Position of scratch boundary |
| scratch boundary, countyline | Location of countyline |
| water boundary | Boundary of body of water |
| Value | Definition |
|---|---|
| 0 | Source information unknown |
| 1 | Helley, Lajoie, and others, 1979 |
| 2 | Ellen and Wentworth, in press |
| 3 | Breabb, 1989 |
| 4 | Water boundaries extracted from the 1:125,000 base scan |
| 5 | Water boundaries extracted from the 1:62,500 base scan |
| 6 | County line extracted from the 1:125,000 base scan |
Compilation of the digital database depended on advice and assistance in the use of ALACARTE-ARC/INFO from T.T. Fitzgibbon and access to ARC/INFO made possible by the Menlo Park GIS Research Laboratory of the U.S. Geological Survey. E.J. Helley provided author linework of the surficial map for scanning. D.L. Knifong assigned UNIT values to the polygons for the Santa Cruz geologic map. D.S. Aitken of the GIS lab provided access to a digital version of the color boundaries for the geologic map of Santa Cruz County and scanned and vectorized the fault plates for that map and the hillside materials map and the several layers of the topographic base map. N.L. Hoskin provided access to working files of the color boundaries and polygon tags for the hillside materials map. S.D. Ellen and E.E. Brabb shared their geologic expertise about the region.
The purpose of this digital map database is to provide a map of the distribution and character of the geologic materials following the pattern of its progenitors, Wentworth and others (1985) and Ellen and Wentworth (in press at the time of the release).
Are there legal restrictions on access or use of the data?Access_Constraints: None
Use_Constraints: None
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
| Data format: | Geologic units and structural features in format ARCE (version 6.x) Size: 3.7 |
|---|---|
| Network links: |
http://pubs.usgs.gov/of/1993/of93-693/ssfb_m1.tar.Z |