USGS - science for a changing world

Mineral Resources On-Line Spatial Data

Mineral Resources > Online Spatial Data > Geology > by state > Colorado

Rico and Hermosa Fms

Arkosic sandstone, conglomerate, shale, and limestone. Includes at base in some areas siltstone and shale of Molas Fm or Larsen Quartzite
StateColorado
NameRico and Hermosa Fms
Geologic agePhanerozoic | Paleozoic | Carboniferous Pennsylvanian
Original map label&rh
Primary rock typesandstone
Secondary rock typeconglomerate
Other rock typesshale; limestone; mudstone
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Conglomerate
Sedimentary > Clastic > Sandstone > Arkose
Minor
Sedimentary > Clastic > Siltstone
Map references
Tweto, Ogden 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.
Unit references
Tweto, Ogden 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.
Geographic coverageArchuleta - Dolores - Hinsdale - La Plata - San Juan

Show this information as [XML]

AccessibilityFOIAPrivacyPolicies and Notices

Take Pride in America logoUSA.gov logoU.S. Department of the Interior | U.S. Geological Survey
URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=COPArh;0
Page Contact Information: Peter Schweitzer