Title: Geologic Map of the Pagosa Springs 7.5’ Quadrangle, Archuleta County, Colorado By David W. Moore and David J. Lidke 2018 U.S. Geological Survey Scientific Investigations Map 3419 U.S. Geological Survey data release https://doi.org/10.5066/P9WRSUI6 ABSTRACT: The geologic map of the Pagosa Springs 7.5’ quadrangle in southwestern Colorado includes the town of Pagosa Springs that is partly known for its hot springs. The quadrangle is southwest of the San Juan volcanic mountains (Oligocene) and north of the San Juan Basin. All bedrock units exposed in the map area are Upper Cretaceous in age except a minor canyon outcrop of Jurassic rock. Early Holocene deposits are mainly alluvial gravels and outwash on terraces. Structure is simple: shale and sandstone beds dip at low angles east-to-northeast as a broad limb of the north-northwest striking Archuleta anticline. Three geologic cross sections controlled by drill holes are included and depict Mesozoic bedrock and faults down to and including shallow Precambrian basement rock. A brief geologic history of the region is described. DISCLAIMERS: This database, identified as SIM3419, has been approved for release by the U.S. Geological Survey (USGS). Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. 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. Government. 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/sim3419. The map sheet is an Adobe Portable Document Format (PDF) (sim3419_sheet.pdf) from which paper copies may be printed. REPORT FILES: 00ReadMe.txt sim3419_pamphlet.pdf sim3419_sheet.pdf sim3419_sheet_georeferenced.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/P9WRSUI6 GIS FILES INCLUDED IN THIS REPORT 00ReadMe.txt SIM3419_Metadata.met SIM3419_Metadata.xml SIM3419_Topo.zip: USTopo_pagosaspgs_2013.tif USTopo_pagosaspgs_2013.tfw SIM3419_Hillshade.zip: PagosaSprings_hillshade.tif PagosaSprings_hillshade.tfw SIM3419_Shapefiles.zip: pagosa_lines.shp (.dbf/.prj/.sbn/.sbx/.shx.xml/.shx) line pagosa_folds.shp (.dbf/.prj/.sbn/.sbx/.shx.xml/.shx) line pagosa_points.shp (.dbf/.prj/.sbn/.sbx/.shx.xml/.shx) point PLSS.shp (.dbf/.prj/.sbn/.sbx/.shx.xml/.shx) line pagosa_wells.shp (.dbf/.prj/.sbn/.sbx/.shx.xml/.shx) point pagosa_labels.shp (.dbf/.prj/.sbn/.sbx/.shx.xml/.shx) point CrossSections.shp (.dbf/.prj/.sbn/.sbx/.shx.xml/.shx) line pagosa_polys.shp (.dbf/.prj/.sbn/.sbx/.shx.xml/.shx) polygon SIM3419_Geodatabase.gdb.zip contains GIS data as geodatabase feature classes ---------------------------------------------------------------------------- The database contact is: Paco VanSistine 303-236-5452 dvansistine@usgs.gov U.S. Geological Survey Mail Stop 980 Denver, CO 80225 The data were compiled from field mapping, interpretation of lidar data, color-infrared and historical black and white aerial photographs, and NAIP imagery. Margaret Berry (U.S. Geological Survey) and Chris Carroll (Wyoming Geological Survey) reviewed the geologic map and accompanying text. This geospatial database consists of ArcView shapefiles and ArcGIS geodatabase files contained in a zip archive. See the list above. Please refer to the file SIM3419.met for detailed metadata documentation for this geospatial database. 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/sim3419/ and follow the directions to download the files. The main product is a Portable Document Format (PDF) map, which requires Adobe Acrobat for viewing. This Portable Document Format (PDF) file (sim3419_sheet.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: Moore, D.W., and Lidke, D.J., 2018, Geologic map of the Pagosa Springs 7.5' quadrangle, Archuleta County, Colorado: U.S. Geological Survey Scientific Investigations Map 3419, pamphlet 24 p., scale 1:24,000, https://doi.org/10.3133/sim3419. 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/P9WRSUI6 DATA RELEASE REFERENCE: Moore, D.W., Lidke, D.J., and VanSistine, D.P., 2018, Data release for the geologic map of the Pagosa Springs 7.5' quadrangle, Archuleta County, Colorado: U.S. Geological Survey data release, scale 1:24,000, https://doi.org/10.5066/P9WRSUI6. 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.