IDAHO LOST RIVER SHELF TO MONTANA CRATON: NORTH AMERICAN LATE DEVONIAN STRATIGRAPHY, SURFACES, AND INTRASHELF BASIN
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Published:January 01, 2017
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George W. Grader, Peter E. Isaacson, P. Ted Doughty, Michael C. Pope, Michael K. Desantis, 2017. "IDAHO LOST RIVER SHELF TO MONTANA CRATON: NORTH AMERICAN LATE DEVONIAN STRATIGRAPHY, SURFACES, AND INTRASHELF BASIN", NEWADVANCES IN DEVONIAN CARBONATES: OUTCROP ANALOGS, RESERVOIRS AND CHRONOSTRATIGRAPHY, Ted E. Playton, Charles Kerans, John A.W. Weissenberger
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ABSTRACT:
Understanding of very thick Late Devonian shelf strata in Idaho is hindered by formation terminologies. Interpreted genetically, and in combination with lower accommodation settings in Montana, strata reveal craton-to-basin geometries and analogues similar to other western Laurentian basins. The Jefferson Formation Birdbear Member and Three Forks Formation in Montana are correlated to the Jefferson Grandview Dolomite in Idaho using regional sequence stratigraphic surfaces. A new stratigraphic framework defines three widely deposited latest Frasnian sequences and Early Famennian intrashelf basin paleogeography.
Peritidal to marine mixed siliciclastic and carbonate rocks of the Middle Devonian lower Jefferson Formation in Idaho are overlain...
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Contents
NEWADVANCES IN DEVONIAN CARBONATES: OUTCROP ANALOGS, RESERVOIRS AND CHRONOSTRATIGRAPHY
The Devonian stratigraphic record contains a wealth of information that highlights the response of carbonate platforms to both global-scale and local phenomena that drive carbonate architecture and productivity. Signals embedded particularly in the Middle-Upper Devonian carbonate record related to biotic crises and stressed oceanic conditions, long-term accommodation trends, and peak greenhouse to transitional climatic changes are observed in multiple localities around the world and temporally constrained by biostratigraphy, highlighting distinct and impactful global controls. Devonian datasets also stress the importance of local or regional phenomena, such as bolide impacts, the effects of terrestrial input and paleogeography, syn-depositional tectonics, and high-frequency accommodation drivers, which add complexity to the carbonate stratigraphic record when superimposed on global trends. The unique occurrence of well-studied and pristinely preserved reefal carbonate outcrop and subsurface datasets, ranging across the globe from Australia to Canada, allows for a detailed examination of Devonian carbonate systems from a global perspective and the opportunity to develop well-constrained predictive relationships and conceptual models. Advances in the understanding of the Devonian carbonate system is advantageous considering, not only the classic conventional reservoirs such as the pinnacle reefs of the Alberta Basin, but also emerging conventional reservoirs in Eurasia, and many unconventional plays in North America. The papers in this volume provide updated stratigraphic frameworks for classic Devonian datasets using integrated correlation approaches; new or synthesized frameworks for less studied basins, reservoirs, or areas; and discussions on the complex interplay of extrinsic and intrinsic controls that drive carbonate architectures, productivity, and distribution. The 13 papers in this special publication include outcrop and subsurface studies of Middle to Upper Devonian carbonates of western Canada, the Lennard Shelf of the Canning Basin, Western Australia, and the western USA.
GeoRef
- basins
- biogenic structures
- bioherms
- Borah Peak
- carbonate rocks
- Carboniferous
- clastic rocks
- cratons
- Crinoidea
- Crinozoa
- Custer County Idaho
- cyclic processes
- depositional environment
- Devonian
- dolostone
- Echinodermata
- Famennian
- Frasnian
- Idaho
- Jefferson Group
- Lemhi Range
- limestone
- Lost River Range
- marine environment
- Mississippian
- Montana
- Nisku Formation
- North America
- packstone
- paleogeography
- Paleozoic
- sedimentary basins
- sedimentary rocks
- sedimentary structures
- shale
- shelf environment
- turbidite
- United States
- Upper Devonian
- upper Frasnian
- upper Paleozoic
- Three Forks Formation
- Sappington Formation
- Trident Member
- Winterburn Formation
- Grandview Canyon