A Deep Profile of Weathering on Pre-Wisconsin Drift in Glacier Park, Montana
Horberg L. 1956. A Deep Profile of Weathering on Pre-Wisconsin Drift in Glacier Park, Montana. The Journal of Geology. 64(3):201-218
A deep profile of weathering on pre-Wisconsin (? Kansan) Kennedy drift in Glacier Park, Montana includes a complex B-horizon 19 feet thick, a leached horizon 57 feet thick, and a CaCo3-indurated horizon 93 feet thick. Samples from the weathered zone were studied in the laboratory for variations in mechanical composition and lithology. The combined silt-clay fractions were analyzed spectrographically for major and minor chemical constituents. The variations shown by the laboratory studies are correlated with horizons in the profile. The profile is interpreted in the light of the geomorphic, glacial, and Pleistocene climate history of the region. It is concluded that the profile developed largely during the Yarmouth interglacial stage and that a complex horizon in the upper 10 feet probably developed during the Sangamon interglacial, the Tazewell-Cary interstadial of the Wisconsin, and Recent time.
- Type
- Journal Article
- Authors
- Horberg, Leland
- Units
- CRCO , GLAC
- Keywords
- Geology, Pre-Wisconsin Drift, Weathering