...K. WOIDA; M. L. THOMPSON Abstract The Yarmouth-Sangamon Paleosol (YSP) is a major soil-stratigraphic unit occurring across a large portion of the U.S. Midwest. Study of a YSP exposed in a toposequence near Earlham, Iowa, demonstrates the paleosol's usefulness for deciphering paleoenvironments...

..., the modal constituents show negligible variation from Iowa to Illinois, and between sheet and channel sands, and little compositional variation from other major Pennsylvanian sandstones of the Eastern Interior Basin. GeoRef, Copyright 2008, American Geological Institute. Reference includes data from...

... of Missouri and Illinois ( Brower, 1973 ), and the Girvan “Starfish Beds” of Scotland ( Donovan, Paul and Lewis, 1996 ). Holterhoff (1997 ) reviewed the paleoecology of most Paleozoic crinoids. The Upper Ordovician Dunleith Formation of northern Iowa and southern Minnesota contains abundant and well...

...James C. Brower Abstract Pleurocystites strimplei new species, from the Galena Group of Iowa and Minnesota, is closely related to P. squamosus Billings from the Appalachians and Michigan. Numerous specimens provide information about growth, living habits, functional morphology, and respiration...

...Kenneth E. Windom; W. Randall Van Schmus; Karl E. Seifert; E. Timothy Wallin; Raymond R. Anderson Abstract A Precambrian igneous body of ultramafic and mafic rocks, named the Otter Creek layered igneous complex, occurs within the basement of northwestern Iowa, United States. It is marked...

... to this stage have been reported from Oelwein, in Fayette county; 4 from Scott county (doubtfully); 5 from Cedar county (doubtfully); 6 from Tama county; 7 from Chickasaw county; 8 from Union county, 9 and several additional probable localities in southern Iowa are given by Bain. 10 Four species of mosses...

... adsymphysial bears teeth, forms 50 percent of the symphysis, and meets its antimere in a very coarsely rugose suture. These and other characters are shown to occur also in Greererpeton burkemorani, to which we refer the Illinois specimens. Colosteid mandibles from a Late Mississippian locality in southern Iowa...