Geologic map of the Pagosa Springs 7.5' quadrangle, Archuleta County, Colorado

Scientific Investigations Map 3419
By:  and 

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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.

Suggested Citation

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.

ISSN: 2329-132X (online)

Study Area

Table of Contents

  • Location and General Geology
  • Brief History
  • Surficial Deposits
  • Structure
  • Cross Sections and Subsurface Information
  • Acknowledgments
  • Description of Map Units
  • References Cited
  • Glossary

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Geologic map of the Pagosa Springs 7.5' quadrangle, Archuleta County, Colorado
Series title Scientific Investigations Map
Series number 3419
DOI 10.3133/sim3419
Year Published 2018
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Geosciences and Environmental Change Science Center
Description Pamphlet: v, 24 p.; Map: 42.28 x 36.90 inches; Data Release; Read Me
Country United States
State Colorado
County Archuleta County
Online Only (Y/N) Y