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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 38 (1954)

Issue: 5. (May)

First Page: 952

Last Page: 953

Title: Geology of Disturbed Belt of Southeastern Idaho: ABSTRACT

Author(s): Milton Zeni

Article Type: Meeting abstract


The Disturbed Belt of southeastern Idaho is located on the eastern edge of the Cordilleran geosyncline. The structure and stratigraphy are quite similar to that found along the eastern edge of the Cordilleran geosyncline from Canada to southern Nevada. Oil is being produced from a similar structural environment at Turner Valley and Pincher Creek in Canada.

Southeastern Idaho can be divided roughly into parallel zones of structural shortening. Synclinoria, characterized by long, narrow, asymmetrical doubly plunging folds, are separated by anticlinoria which have over-developed into zones of thrusting and imbricate faulting. Overthrusting and imbricate faulting are uncommon in the synclinoria.

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Limited isopach data indicate that southeastern Idaho, from southwest to northeast, contains rocks of basinal, marginal, and foreland thicknesses. Generally, the lithofacies maps tend to confirm these relationships.

Five unsuccessful wildcat wells have been drilled in the province which covers 4,000 square miles. Four of the five wells were drilled on anticlines located in the synclinoria, and one was drilled in the imbricate area. Although results to date have been somewhat discouraging, the area has not been completely tested. None of the wells have penetrated the Paleozoic section beneath the Mississippian-Madison limestone, and numerous large folds, offering multiple objectives, have not been tested.

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Copyright 1997 American Association of Petroleum Geologists