Annual report of the United States Geological Survey to the Secretary of the Interior (1898) (14779530881)

Identifier: annualreportofu2021geol_2 (find matches)

Title: Annual report of the United States Geological Survey to the Secretary of the Interior

Year: 1880 (1880s)

Authors: Geological Survey (U.S.)

Subjects: Geological Survey (U.S.) Geology Water-supply Forest reserves Mines and mineral resources

Publisher: Washington : G.P.O.

Contributing Library: University of Illinois Urbana-Champaign

Digitizing Sponsor: University of Illinois Urbana-Champaign

Text Appearing Before Image:

rowth.4a. Ventral valve seen from above. 4/;. Outline side view of same.4c. Posterior view of same. Ouray limestone; Engineer Mountain 7. 5. Ventral valve of medium size with a high, flat area, directed at right angles to the plane of junction of the valves. The sinus is markedby numerous bifurcated striae, not well shown by the figure. 5a. Specimen seen from above. 5b. Same; side view in outline. 5c. Posterior view of same, showing wide foramen.I Miray limestone; Durango 294. 6. A large ventral valve, with its high area nearly flat and inclined back- ward toward the plane of junction of the valves. The sinus is trav-ersed by coarse bifurcated strise.6«. Specimen seen from above. 65. Side view of same in outline, showing inclination of the area and its slight concavity.6c. Posterior view of same, showing the broad delthyrium.Ouray limestone; Durango 291. 7. Dorsal valve of a transverse type.la. Shell seen from above. 70 U. S. GEOLOGICAL SURVEY TWENTIETH ANNUAL REPORT. PART II. PL. IV

Text Appearing After Image:

FOSSILS FROM THE OURAY LIMESTONE UNIVERSITY oHLUNOiS. GIRTY.) DESCRIPTION OF PLATE IV CONTINUED. Spirifer disjunctus var. animasensis—Continued.~b. Same; side view in outline. Ouray limestone; Durango 294. 8. A dorsal valve of the subquadrate type, and of medium size. The fold is covered by a large number of bifurcated striae, finer than those at the sides.So. Specimen seen from above.8b. Side view of same in outline. Ouray limestone; Durango 21)4. 9. A large dorsal valve of subquadrate shape. The fold is traversed by numerous striae, large and fine, simple and bifurcate.9a. Shell seen from above.9b. Same; side view in outline. Ouray limestone; Durango 291. 10. A subquadrate dorsal valve of large size, in which the plications upon the fold are coarse and simple.10«. Specimen seen from above.10/;. Side view of same in outline. Ouray limestone; Durango 291. PLATE V. 73 PLATE V. Spirifer coniculus 1. A rather large but distorted and not very perfect ventral valve belong- ing to this s

Годовой отчет геологической службы США министру внутренних дел 1898 г. книжные иллюстрации шахты и полезные ископаемые геология высокое разрешение изображения из интернет-архива

1898

University of Illinois Urbana-Champaign

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public domain