Classification of Wisconsin Ground Moraine by Airphoto Interpretation

Abstract

This report discusses the quantitative and qualitative differences in the airphoto patterns of the Early Tazewsll, late Tazewell and Cary ground moraines* Engineering properties of the various soils^were determined for representative sauries in each of the three substages The Cary substage is more clayey than the other two, and the Early Tazeviell substage exhibits a significant development of loes3« The airphoto pattern elements of topography, drainage, erosion, photo tone., vegetation,, and c l features for each substage are usually significantly different such that the three substages can be distinguished by airphoto interpretation,! The report is presented to the Board for the recordo Respectfully submittedj. ABSTRACT viiiTill ABSTRACT This thesis reports the difference in airphoto patterns and engineering properties of the three substages of the Wisconsin ground moraine in Indiana.The research was part of the soil mapping program of the Joint Highway Research Project, Purdue University.The engineering properties of the soils were determined by laboratory testing of soil samples taken in each of the three substages.The tests showed a consistent difference in the engineering properties of the parent material of the three substages.The descriptions of the airphoto pattern elements were developed for each substage by a combined visual and stereoscopic examination of airphoto mosaics; by measurements taken on topographic maps, drainage maps, and airphoto mosaics; and by a survey of literature.The airphotos used in this study were at a scale of 1/20,000.