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The AAPG/Datapages Combined Publications Database

Williston Basin Symposium

Abstract

SKGS-AAPG

Fifth International Williston Basin Symposium, June 14, 1987 (SP9)

Pages 83 - 97

CORALS FROM THE MADISON GROUP, WILLISTON BASIN, NORTH DAKOTA

DOUGLAS L. WATERS, ARCO Alaska Inc., Anchorage, AK 99510-0360
WILLIAM J. SANDO, U.S. Geological Survey, U.S. National Museum of Natural History, Washington, D.C.

ABSTRACT

Study of cores from the Madison Group (Mississippian) in 29 wells in the Williston Basin of North Dakota revealed a coral fauna represented by eleven species and four morphogroups belonging to the genera Amplexocarinia, Amplexizaphrentis, Cyathoxonia, Lophophyllum, Michelinia, Siphonodendron, Stelechophyllum, Synchoelasma, Syringopora, and Vesiculophyllum. Four zonules based on corals are useful for correlation of Mississippian rocks within the area studied. Stelechophyllum micrum and S. banffense are recorded in the conterminous United States for the first time.

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