Morgan Formation

Usage of Geologic Unit Name:
Morgan Formation (CO*,UT*,WY*)
Morgan Formation of Durst Group (CO,UT)
Pennsylvanian, Early*
Pennsylvanian, Middle*
Geologic Province:
Green River basin*
Uinta uplift*
Uinta basin
Wasatch uplift*
Piceance basin*
Areal Extent:

Type Locality:
Not designated. Derivation of name not given (Blackwelder, 1910).

Hells Canyon Member (CO,UT).

Unit Name History:
Named (Blackwelder, 1910). Overview (Brill, 1944). Assigned to Durst Group (Sadlick, 1957). Overview (Hansen, 1965). Areal limits (Mallory, 1967). Revised (Powers, 1986).


Blackwelder, E., 1910, New light on the geology of the Wasatch Mountains, Utah: Geological Society of America Bulletin, v. 21, p. 517-542.

Brill, K.G., Jr., 1944, Late Paleozoic stratigraphy, west-central and northwestern Colorado: Geological Society of America Bulletin, v. 55, no. 5, p. 621-656.

Sadlick, Walter, 1957, Regional relations of the Carboniferous rocks of northeastern Utah, IN Guidebook to the geology of the Uinta basin: Intermountain Association of Petroleum Geologists Guidebook, 8th Annual Field Conference, p. 56-77.

Hansen, W.R., 1965, Geology of the Flaming Gorge area, Utah-Colorado-Wyoming: U.S. Geological Survey Professional Paper, 490, 196 p.

Mallory, W.W., 1967, Pennsylvanian and associated rocks in Wyoming, IN Shorter contributions to general geology, 1966: U.S. Geological Survey Professional Paper, 554-G, p. G1-G31.

Powers, R.B., 1986, The Willow Creek Fault, eastern Uinta Mountains; geologic analysis of a foreland subthrust play, IN Stone, D.S., and Johnson, K.S., editors, New interpretations of northwest Colorado geology: Rocky Mountain Association of Geologists Field Conference Guidebook, p. 183-190.

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Last modified: 1/7/2011