--> Paleozoic Carbonate Stacking Patterns in Idaho, U.S.A., by Peter E. Isaacson, Michael C. Pope, Isabel P. Montanez, and Liselle Batt, #50022 (2005)

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Paleozoic Carbonate Stacking Patterns in Idaho, U.S.A.*


Peter E. Isaacson1, Michael C. Pope2, Isabel P. Montanez3, and Liselle Batt4


Search and Discovery Article #50026 (2005)

Posted November 10, 2005


*Oral Presentation at Rocky Mountain Section AAPG Annual Meeting, Jackson, Wyoming, September 24-26, 2005. Appreciation is expressed to Lyn George, Technical Program Chair, and Don French, for encouraging the authors to submit this presentation. Presentations on related subjects are by Abplanapl et al. (2005) and Batt et al. (2005).


Click to view presentation in PDF format.


1Dept. Geological Sciences, University of Idaho, Moscow, ID 83844-3022, phone: 208-885-7969, fax: 208-885-5724 ([email protected])

2Department of Geology, Washington State University, Pullman, WA 99164

3Department of Geology, University of California, Davis, CA 95616

4Geological Sciences, University of Idaho, Moscow, ID 83844-3022



General Setting 

      Over 12 km of Silurian-Pennsylvanian carbonates – significant accommodation

      Pre-Mississippian carbonates dolomitized

      Devonian “Alberta-style” buildups

      Early Mississippian flysch (western-derived) and carbonate progradation

      Late Mississippian glacio-eustacy

      Penn/Perm hydrozoan buildups



Early Paleozoic general depositional setting.



Lower Paleozoic stratigraphic column, representative of passive-margin deposition.


Early Paleozoic Passive Margin Tectonic Overview:

Pre-Silurian through Middle Devonian 

      Passive margin

      Sediment and water loading provides accommodation.

      Early Silurian continental margin located at present Lost River Range front

      Coeval unstudied organic skeletal buildups (“reefs”) on paleo-shelf (Pahsimeroi Valley) yielding to gravity-flow    
     deposits (west of Lost River Range)


Late Paleozoic--Late Devonian through Permian--Tectonic Loading by Allochthons

      Tectonic highland appears in Late Devonian (Picabo Formation) – RM (equivalent) allochthon?

      Significant flysch trough begins, Early Mississippian.

      Carbonate bank builds from east.

      Tectonic loading and sediment loading continue accommodation.

      Second tectonic subsidence even in Late Mississippian