Skip to main content

Mineral Resources On-Line Spatial Data

  1. Mineral Resources
  2. Online Spatial Data
  3. Geology
  4. by state
  5. Arizona

San Rafael Group

XML
JSON
Commonly cross-bedded, ledge-forming sandstone and slope-forming siltstone. Rock typically has a striped red and white aspect. The Carmel Formation and Entrada Sandstone are prominent members of this group. (Late to Middle Jurassic, about 160-180 Ma)
State Arizona
Name San Rafael Group
Geologic age Middle to Late Jurassic
Primary rock type sandstone
Secondary rock type siltstone
Other rock types bentonite; mudstone; conglomerate; limestone; dolostone (dolomite); orthoquartzite; gypsum
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Siltstone (Bed)
Minor
Sedimentary > Clastic > Mudstone (Bed)
Sedimentary > Clastic > Mudstone > Claystone > Bentonite (Bed)
Sedimentary > Clastic > Sandstone > Arenite (Bed)
Incidental
Sedimentary > Chemical > Evaporite > Gypsum (Bed)
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Clastic > Mudstone (Calcareous)
Map references
Richard, S. M., Reynolds, S.J., Spencer, J. E., and Pearthree, P. A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.
Unit references
Richard, S. M., Reynolds, S.J., Spencer, J. E., and Pearthree, P. A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.
Blakey, R.C., 1989, Triassic and Jurassic geology of the southern Colorado Plateau, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Geological Society Digest 17, p. 369-396.
Counties Apache - Coconino - Navajo