Abstracts

Abstract

Abstracts included:

Roger F. Boneham. Earth Science Teaching in Indiana—Twenty Years Later.

Timothy S. Brothers. Historical Evolution of Surface-Mine Grasslands in the Illinois Coal Basin.

Walter A. Hasenmueller, Louis V. Miller, and Jimmy J. Johnson. Bias in Coal-Sample Sources and Its Implications in Estimating Coal-Resource Quality

Robert B. Votaw. Black Riveran (Ordovician) Conodonts from the Marmora Area, Ontario Lowlands, Canada.

Terry R. West. Geological Aspects of Sanitary Landfill Siting in Marion County, Indiana.