REFINE
Browse All : Geology by Bien, Morris. and Julius Bien & Co.
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Author
Spurr, Josiah Edward
Full Title
Aspen District Sheet. Geology Sheet VI . U. S. Geological Survey, Charles D. Walcott, Director. Monograph XXXI. A.H. Thompson, Geographer. Morris Bien, Topographer in charge. Triangulation by Morris Bien. Topography by F.F. Grove. Surveyed in 1891. S.F. Emmons, Geologist in charge. Geology by J.E. Spurr. Assistant, G.W. Tower. Julius Bien & Co. Lith. N.Y. (1898)
List No
0942.003
Note
Topography shown by 100-foot contours. Shows streams, mines, roads, trails, and settlements. Geology shown in 16 colored classes, and faults. Shows alignment of cross-sections presented on the subsequent sheet.
Author
Spurr, Josiah Edward
Full Title
Aspen Special Sheet. Geology Sheet IX. U. S. Geological Survey, Charles D. Walcott, Director. Monograph XXXI. A.H. Thompson, Geographer. Morris Bien, Topographer in charge. Triangulation by Morris Bien. Topography by F.F. Grove. Surveyed in 1891. S.F. Emmons, Geologist in charge. Geology by J.E. Spurr. Assistant, G.W. Tower. Julius Bien & Co. Lith. N.Y. (1898)
List No
0942.006
Note
Geology shown in color in 11 classes, and faults. Cross section alignments provided in next sheet shown here.
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