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Tertiary intrusive rocks in southeastern Utah

StateUtah
NameTertiary intrusive rocks in southeastern Utah
Geologic ageOligocene
Original map labelTi
Commentslaccolithic intrusions mostly diorite porphyry 24-28 Ma
Primary rock typediorite
Secondary rock typemonzodiorite
Other rock typesquartz monzodiorite; quartz diorite; syenite; granite
Lithologic constituents
Major
Igneous > Plutonic > Dioritic > Monzodiorite (Laccolith)
Igneous > Plutonic > Dioritic > Diorite (Laccolith)
Incidental
Igneous > Plutonic > Granitic > Granite (Laccolith)
Igneous > Plutonic > Syenitic > Syenite (Laccolith)
Igneous > Plutonic > Dioritic > Quartz-diorite (Laccolith)
Igneous > Plutonic > Dioritic > Quartz-monzodiorite (Laccolith)
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.
Nutt and Ludington, open file
Geographic coverageEmery - Garfield - Grand - San Juan - Wayne

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=UTTi;7
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