PSGM 25-01 Preliminary Subsurface Geologic Model of south-central San Joaquin Basin 
Datafile Description
Model files exported from SLB Petrel™ Subsurface Software as gridded surfaces (Z-Map Plus ASCII, .XML), and triangulated surfaces (GOCAD .TS) representing horizons, zones, and faults. The gridded surface files store elevation values on a regular grid and can generally be imported into many GIS, mapping, and 3D visualization software packages.
Table 1 lists the contents and corresponding names of the files included in the download.
Datafiles are generated from the volume-based Preliminary Subsurface Geologic Model 25-01 of south-central San Joaquin Basin (PSGM 25-01). Input data such as surface geological map units, subsurface correlations, and seismic interpretations were used to construct the static 3D Geologic framework model. Synthetic data such as projected air-geology points, edge/boundary control points, and other artificial control point data were created and used to constrain the geologic unit extents, model-boundary intersections, and horizon-fault intersections. Two geological fault surfaces were imported from the Statewide California Earthquake Center – Community Fault Model (https://doi.org/10.5281/zenodo.4651667). The PSGM 25-01 model-boundary edges were expanded by 1,000 meters from its actual polygon to support clean-edge extraction. 
Spatial Reference: NAD 1983 / California (Teale) Albers (WKID/EPSG: 3310), meters
Grid-cell size (Surfaces): 250 meters (x, y) 
Vertical Extents: -16,500 to 1,123 meters 
Horizontal Extents (X): -1,000.00 to 102,637.02 meters (Actual: 0.00 to 101,625.22 m)
Horizontal Extents (Y): -294,539.82 to -167,073.40 meters (Actual: -293,537.84 to -168,083.23 m)
Any use of trade, firm, or product names if for descriptive purposes only and does not imply endorsement by the California Geological Survey.
Table 1. Datafile Contents and Filenames
Contents
Datafile name
Alluvium unit Surface Z-Map Plus grid, and xml
1_Alluvium
1_Alluvium.crsmeta.xml

Tulare unit Surface Z-Map Plus grid, and xml
2_Tulare
2_Tulare.crsmeta.xml

San Joaquin / Unconformity unit Surface Z-Map Plus grid, and xml
3_SanJoaquin_Unconfomity
3_SanJoaquin_Unconfomity.crsmeta.xml

Etchegoin unit Surface Z-Map Plus grid, and xml
4_Etchegoin
4_Etchegoin.crsmeta.xml

Kern River unit Surface Z-Map Plus grid, and xml
5_KernRiver
5_KernRiver.crsmeta.xml

Monterey unit Surface Z-Map Plus grid, and xml
6_Monterey
6_Monterey.crsmeta.xml

Temblor unit Surface Z-Map Plus grid, and xml
7_Temblor
7_Temblor.crsmeta.xml

Kreyenhagen unit Surface Z-Map Plus grid, and xml
8_Kreyenhagen
8_Kreyenhagen.crsmeta.xml

Lodo unit Surface Z-Map Plus grid, and xml
9_Lodo
9_Lodo.crsmeta.xml

Cretaceous unit Surface Z-Map Plus grid, and xml
10_Cretaceous
10_Cretaceous.crsmeta.xml

Basement unit Surface Z-Map Plus grid, and xml
11_Basement
11_Basement.crsmeta.xml


