Glaciation of the Rocky Mountains

Late Quaternary vegetation history of the Yellowstone Lake basin, Wyoming

“…Dates on glacial advances elsewhere in the western cordillera (Richmond, 1965(Richmond, , 1970bPorter and Denton, 1967) correlate well with cool, moist periods inferred from my paleobotanical record and support geomorphic and soil-stratigraphic correlation of the Yellowstone glacial deposits with the standard Rocky Mountain glacial sequence (Richmond, 1965). Our knowledge of late Quaternary regional climatic changes is still sketchy.…”

Quaternary geology of Long and Bear Valleys, west-central Idaho

“…Our observations of Bull Lake and Pinedale moraines elsewhere in the Rockies, and a field check by Charles B. Hunt, leave little doubt as to the correlation; it therefore seems preferable to use these established terms (Richmond, 1965(Richmond, ,1962Morrison, 1964, p. 113;Hunt and others, 1953, p. 16) rather than coin a new set of local names. Undoubtedly subdivisions of the Bull Lake and the Pinedale occur in the mapped area, but identification of them is uncertain based on our field methods; such subdivisions do not bear directly on the placer geology, and they are not distinguished on the maps.…”

“…The workable placer gold, complete disintegration of granitic boulders, oxidation to a depth of 6 inches or more in quartzite boulders, and the advanced degree of topographic modification indicate that this moraine is much older than the adjoining Bull Lake moraine. However, two stades of the Bull Lake Glaciation are recognized elsewhere in the Rocky Mountains (Richmond, 1965); if the moraine mapped as Bull Lake is actually late Bull Lake, the older moraine may be early Bull Lake. Its designation as pre-Bull Lake is therefore arbitrary, and a more specific assignment of this and other deposits must await more detailed study.…”

Remedial action plan and site conceptual design for stabilization of the inactive uranium mill tailings sites at Rifle, Colorado. Appendix D, Final report

“…The Quaternary geology and geomorphic history of the study region have been discussed by Cole and Sexton (1981), Epis et al (1980), Sinnock (1981 a,b;, Yeend (1969), andRichmond (1965). Field trip guidebooks to the site region have been published recently by the American Association of Petroleum Geologists (Chenoweth, 1980), the New Mexico Geological Society (Epis and Callender, 1981), the Grand Junction Geological Society (Robinson and Dea, 1981), and the Rocky Mountain Association of Geologists (Dunn, 1974;Murray and Haun, 1974).…”

“…The following discussion is excerpted from articles by Hunt (1956), Lohman (1981Lohman ( , 1965, Yeend (1969), and Sinnock (1981a,b;. For a broader understanding of the Cenozoic and Quaternary geomorphic history of Colorado, the reader is also referred to Epis et al (1980), Meierding and Birkeland (1980), Larson et al (1975), and Richmond (1965).…”