Wisconsin Glacial Limit

WISCONSIN_GLACIAL_LIMIT_IN.shp is a line shapefile that shows the Wisconsin glacial limit in Indiana as delineated by mapped glacial deposits at a scale of 1:500,000. The mapped units include glacial till that is interpreted to have been deposited during the Wisconsin Glaciation. The last major expansion of the North American Laurentide Ice Sheet occured in the Wisconsin glacial episode.WISCONSIN_GLACIAL_LIMIT_IN.shp 为线要素形状文件，用于呈现印第安纳州境内的威斯康星冰期冰界线，该界线基于比例尺1:500000的已填绘冰川沉积数据勾勒而成。其所涵盖的填绘地质单元包括被认定为威斯康星冰期沉积形成的冰碛物（glacial till）。北美劳伦泰德冰盖（Laurentide Ice Sheet）的最后一次大规模扩张即发生在威斯康星冰期时段内。