Architectural facies analysis of nonmarine depositional systems in upper Triassic Chinle Formation, southeastern Utah
The Upper Triassic Chinle Formation in southeastern Utah consists of nonmarine strata deposited in a back-arc cratonic basin. Architectural analysis of exposures in subparallel canyons reveals an intricately interbedded fluvial-deltaic-lacustrine system characterized by (1) mobile fluvial-channel belts consisting of stacked channel complexes; (2) overbank deposits of levees, paleosols, marshes, and small flood-plain lakes interfingered with crevasse splays and lacustrine deltas; and (3) extensive lacustrine strata deposited over the entire study area. Stratigraphic panels using closely spaced measured sections drawn either perpendicular or parallel to depositional dip show lateral facies relations within the extra-channel strata and the relations to channel complexes. Successions of panels through several canyons depict the three-dimensional architecture of the Chinle depositional system.
- Research Organization:
- Geological Survey, Denver, CO (USA)
- OSTI ID:
- 5955250
- Report Number(s):
- CONF-890404-
- Journal Information:
- AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States), Vol. 73:3; Conference: AAPG annual convention with DPA/EMD Divisions and SEPM, San Antonio, TX, USA, 23 Apr 1989
- Country of Publication:
- United States
- Language:
- English
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