Title: Geologic and Geophysical Maps of the Santa Maria and Part of the Point Conception 30'×60' Quadrangles, California By Donald S. Sweetkind, Victoria E. Langenheim, Kristin McDougall- Reid, Christopher C. Sorlien, Shiera C. Demas, Marilyn E. Tennyson, and Samuel Y. Johnson 2021 U.S. Geological Survey Scientific Investigations Map 3472 Data release available at https://doi.org/10.5066/P9FU7SJL ABSTRACT: This report presents digital geologic, gravity, and aeromagnetic maps for the onshore parts of the Santa Maria and Point Conception 30'x60' quadrangles at a compilation scale of 1:100,000. The map depicts the distribution of bedrock units, surficial deposits, paleontological data, geophysical data and structural features in the Santa Maria basin and the Santa Ynez Mountains to the south, an area corresponding to 26 contiguous 7.5-minute quadrangles. The map also includes offshore faults from the Hosgri fault, a major structural feature, east to the shoreline. This new map revises and supersedes two earlier versions of the 30'x60' Santa Maria quadrangle that were produced as part of the U.S. Geological Survey’s investigations of onshore oil and gas resources of the Santa Maria province (Keller, 1995). The first map was released as a scanned black-and-white image of hand-drawn compilation (Tennyson, 1992); the second map was a digital release that is no longer available (Tennyson and others, 1995). This new map also includes the geology of the onshore part of the adjacent Point Conception 30'x60' quadrangle that encompasses the Santa Ynez Mountains of the western Transverse Ranges. The digital database also contains magnetic and gravity data for the entire region, paleontological data, and interpretation of major offshore structural features that bear on the continuity and connection of the mapped onshore structures. DISCLAIMERS: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty, expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey. Although this information product, for the most part, is in the public domain, it also may contain copyrighted material as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. ---------------------------------------------------------------------------- FILES: The map sheet, pamphlet, and text files (Report Files) can be downloaded via the Web from the U.S. Geological Survey publications website at https://doi.org/10.3133/sim3472. The map sheets are in Adobe Portable Document Format (PDF) from which paper copies may be printed. Bookmarks for eight map layouts are organized based on selections from the preserved layers. This combination of layers may be adjusted based on the reader’s preferences. The PDF has preserved the original layering of the map and, if a PDF reader like Adobe Acrobat Pro is used, the layers can be individually toggled "on" and "off" to change the visible information in the file. This capability as well as the "Measuring Tool" with the "Objct Data" and "Geospatial Location" tools will function if the file has been downloaded (functionality can't be guaranteed if opened in an internet browser). Note that the basemap layers (Topo_sheets_raster and hillshade_base_raster) are above the geologic unit polygon layer and effectively block the polygon layer. Because of this ordering, the basemap layers need to be turned "off" when the "Object Data Tool" is used. MAP LAYOUTS: Geologic Map Paleontology Samples Gravity: 2,670 kg/m^3 Gravity: 2,000 kg/m^3 Aeromagnetic: Shallow Aeromagnetic: Medium Aeromagnetic: Total Base Map REPORT FILES: ReadMe.txt sim3472_pamphlet.pdf sim3472_geospatial.pdf sim3472_base.pdf sim3472_aeromag_sh.pdf sim3472_aeromag_med.pdf sim3472_aeromag_total.pdf sim3472_gravity2.0.pdf sim3472_gravity2.67.pdf sim3472_geology.pdf sim3472_paleo.pdf ---------------------------------------------------------------------------- The GIS database for this report is located at and can be downloaded via the Web from ScienceBase at https://doi.org/10.5066/P9FU7SJL HOW TO OBTAIN THE DIGITAL MAP AND PAMPHLET FILES: The map sheet and pamphlet can be obtained via the Internet from the U.S. Geological Survey publications website. Go to the web page at https://doi.org/10.3133/sim3472/ and follow the directions to download the files. The main product is an interactive Portable Document Format (PDF) map, which requires Adobe Acrobat for viewing. The PDF (sim3472_sheet1_geospatial.pdf) can be downloaded, from which paper copies may be printed. Acrobat software runs on a variety of systems, and is available for download free of charge from Adobe at http://www.adobe.com. PUBLICATION REFERENCE: Sweetkind, D.S., Langenheim, V.E., McDougall-Reid, K., Sorlien, C.C., Demas, S.C., Tennyson, M.E., and Johnson, S.Y., 2021, Geologic and geophysical maps of the Santa Maria and part of the Point Conception 30'x60' quadrangles, California: U.S. Geological Survey Scientific Investigations Map 3472, 1 sheet, scale 1: 100,0000, 58-p. pamphlet, https://doi.org/10.3133/sim3472. [Supersedes USGS Open-File Reports 95–25 and 92–189.] HOW TO OBTAIN THE DIGITAL GIS FILES: The digital GIS files constituting the geologic map database of this report can be obtained from the U.S. Geological Survey via the Internet from ScienceBase: ScienceBase link: https://doi.org/10.5066/P9FU7SJL DATA RELEASE REFERENCE: Sweetkind, D.S., Langenheim, V.E., and McDougall-Reid, K., 2021, Data release—Geologic and geophysical maps of the onshore parts of the Santa Maria and Point Conception 30'x60' quadrangles, California: U.S. Geological Survey data release, https://doi.org/10.5066/P9FU7SJL. ArcReader may be downloaded free of charge from http://www.esri.com/software/arcgis/arcreader/download for viewing additional files included in this report. This map is offered as an online-only, digital publication. Users should be aware that, because of differences in rendering processes and pixel resolution, some slight distortion of scale may occur when viewing it on a computer screen or when printing it on an electronic plotter, even when it is viewed or printed at its intended publication scale.