On a new Tertiary lake basin

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Abstract
SEVERAL Lake Ba~in~ of 'ren inl'Y age have already been discovered in the Hocky Mountain region, and the more important of them bnve been carefully explored.'1'hose of Eocene age have only been knowll since 1870, butthe Miocene deposits of the White Ri vel' have long been noted for their wOllllerful scenery, as well as for tlIe number and variety of the mammalian remains found in them.Another Miocene basin is known in Oregon, anel both t!Je lake beds of this period are overbid by deposits of Pliocene age.*During the explorations cal'l'ied on last summer under the directlOn of Col. VIf m.Ludlow, Corps of Engineers, a series of Tertiary deposits were identified by the writers !leat' Camp Baker, Montana.rrhese deposits indicate the existence in this region of a Miocene lake basin, which was succeeded by another lake basin in PliOl~ene time.As these basins are quite distillct from those heretofOl'e known, it is considered important to put the fact of their discovery on recol'(1.Camp Baker is situated on Deep CI'eek, a stream which flows into the Missouri River above Sun River.It lies about fifty miles nearly due east of Helena.It is surrounded on all sides by mountaIns, of which the Big Belt Range, lying immediately to the south or southwest, is the llighest and most conspicuous.
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Authors George Bird Grinnell, E. S. Dana
Journal american journal of science
Year 1876
DOI
10.2475/ajs.s3-11.62.126
URL
https://doi.org/10.2475/ajs.s3-11.62.126
Keywords Keywords not found

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