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Younger Precambrian metamorphic rocks in Logan-Huntsville Allochthon

State Utah
Name Younger Precambrian metamorphic rocks in Logan-Huntsville Allochthon
Geologic age Proterozoic Z
Primary rock type arenite
Secondary rock type fine-grained mixed clastic
Other rock types conglomerate; basalt
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone > Arenite (Bed)
Sedimentary > Clastic > Mixed-clastic > Siltstone-mudstone (Bed)
Minor
Sedimentary > Clastic > Conglomerate (Bed)some diamictite
Incidental
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow)flow, in Pocatello have identified basaltic volcaniclastic, basalt pillow lava
Map references
Hintze, L.F., 1980, Geologic map of Utah: Utah Geological and Mineral Survey, scale 1:500,000.
Unit references
Hintze, L.F., 1980, Geologic map of Utah: Utah Geological and Mineral Survey, scale 1:500,000.
Hintze, L.F., 1988, Geologic History of Utah: Brigham Young University Geology Studies Special Publication 7, 202 p.
Counties Box Elder - Cache - Weber