GLACIAL-HISTORY
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This GIS dataset depicts the Foothills Erratics Train in Southwestern Alberta, Canada (GIS data, point features). The erratics train is composed of a distinctive type of glacially transported erratic, whose distribution might relate to coalescence of the Laurentide and Cordilleran Ice Sheets. These data were compiled from published sources. no attempt was made to verify their accuracy. These data comprise the point features to accompany Alberta Geological Survey Map 604, Glacial Landforms of Alberta, Canada. The data were created in geodatabase format and output for public distribution in shapefile format.
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This GIS dataset portrays the distribution of glacial landforms in Alberta, based on the compilation of existing government survey mapping and research literature, supplemented by new analysis of remote sensing data. It is the dataset that was used to create Alberta Geological Survey Map 604 (Glacial Landforms of Alberta) using an intermediate step of reducing the density of closely spaced line segments to make the features suitable for map production at 1:1 000 000 scale. This dataset contains the original line features without any cartographic generalization. The data were created in geodatabase format and output for public distribution in shapefile format.