2 Midcontinent Mississippian Surface and Subsurface Studies
Monday, 17 March 2014
8:00 AM - 12:00 PM
Eureka Springs Ballroom 1&2
A COMPARISON OF OSAGE MARKER BEDS IN SOUTHWESTERN IOWA WITH THOSE OF THE SOUTHERN OZARKS
Paper number: 2-2
Program: Symposia Sessions
Time: 8:20 AM – 8:40 AM
Authors
Abstract
Osage marker beds are a valuable correlation tool. In a comparison of Iowa and the Ozarks marker beds give a detailed correlation - to the craton margin in Arkansas where the units thin and become cherty. Most marker beds are either oolite or crinoid grainstones, up to a meter thick, deposited during warm interglacial intervals on the craton. The silty partings formed during glacial lowstands with erosion of the inner craton.