Geology . on;Kp (Pierre) and Ktd (Trinidad), Montana series; Kl, Laramie; Epc (Poison Canyonfoimation) and Ech (Cuchara formation) Eocene (?). Length of the section, about15 miles. (Walsenburg, Colo., folio, U. S. Geol. Surv.) In a considerable area in northeastern Wyoming, and in a largearea farther north,1 some of the Laramie lignite has been burned. The 1 Allen, Proc. Boston Soc. Nat. Hist., Vol. XVI, p. 246, 1874; also Bastin, Jour,of Geol., Vol. XIII, p. 408. These phenomena were also noted and correctly inter-preted by Lewis and Clarke. See report of their expedition. GEOLOGY. burnin
Geology . on;Kp (Pierre) and Ktd (Trinidad), Montana series; Kl, Laramie; Epc (Poison Canyonfoimation) and Ech (Cuchara formation) Eocene (?). Length of the section, about15 miles. (Walsenburg, Colo., folio, U. S. Geol. Surv.) In a considerable area in northeastern Wyoming, and in a largearea farther north,1 some of the Laramie lignite has been burned. The 1 Allen, Proc. Boston Soc. Nat. Hist., Vol. XVI, p. 246, 1874; also Bastin, Jour,of Geol., Vol. XIII, p. 408. These phenomena were also noted and correctly inter-preted by Lewis and Clarke. See report of their expedition. GEOLOGY. burning was relatively recent, and locally is si ill in progress. The firingappears to have taken place on the sides of bills and valleys where the lignite outcrops. Hack from the slopes where the outcrops occur, chimneys or vents appear to have sometimes developed, probably alongjoints, leading up from the burning coal to the surface, giving rise to pseudo-volcanoes. The burning was accompanied by fusion, semi-.
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