"Geological Sections of the United States." London: I.T. Hinton & Simpkin & Marshall, 1832. 8 x 9 7/8. Engraving by Fenner, Sears & Co. Very good condition.
A pair of geological cross-sections of the United States, divided into Northern and Southern, issued in England in 1832. Up to fifteen different categories of geological sections are identified for the region east of the continental divide, indicated with divisions and elevations. Attractive and fascinating for its depiction of the state of knowledge of the continent at the time. $65
Carl Radefeld. "Geognostische Karte der Nord-Americanischen Freistaaten. 1853." Hildburghhausen: Bibliographischen Instituts, 1853. 11 1/2 x 13 7/8. Engraving. Original hand color. very good condition. Denver.
A brightly colored geognostic map of the "North American Free States" issued within a couple years of the Compromise of 1850 which created the state of California and the territories of Utah and New Mexico. The political divisions of the trans-Mississippi region are correct, and there is impressive detail of rivers and many western Indian tribes. There are errors, of course (such as the "Great Sandy Plains" in the Great Basin), but very up-to-date for a European map in this period. The geological features are fascinating and includes the "gold region" in California. Attractive, impressively accurate, this is a nice map of the "Free States." $275
Charles H. Hitchcock, Ph.D. "Gray's Geological Map of the United States." Philadelphia: O.W. Gray, 1875. 16 1/2 x 27. Lithograph. Original hand color. Very good condition. With decorative leaf border.
A map of the United States issued in 1875 at a period when the completion of the transcontinental railroad and gold rushes in California and Colorado led to an upswing in the speed of development of the trans-Mississippi west. Nine different geological epochs are illustrated, broken into four categories: Eozoic, Paleozoic, Mesozoic and Cenozoic. The colors of each easily denotes the vast difference in US regions' geological origins, especially from East to West. This map is a fine picture of US geological history as understood in 1875. $275
Charles H. Hitchcock. "Gray's Geological Map of the United States." Philadelphia: O.W. Gray & Son, 1881. 16 x 26 1/2. Lithograph. Bright, original color. Very good condition.
A dramatic geological map drawn by Dr. Charles H. Hitchcock, a professor of geology at Dartmouth College. Beautifully colored, the map shows nine different geological classifications. $150
Colorful and informative maps of single Pennsylvania counties. The boundaries and the townships within are nicely set off with contrasting shades applied by lithography. The maps have fine detail and are neatly exhibited. Topographical information such as towns, rivers, railroads and elevations are all depicted as well as color coded to the geological formations of each. Dates of surveys and work of individual cartographers and geologists are noted on many. Aesthetically and cartographically fascinating maps. All maps are $30
Colorful and informative maps of single Pennsylvania counties. The boundaries and the townships within are nicely set off with contrasting shades applied by lithography. The maps have fine detail and are neatly exhibited. Topographical information such as towns, rivers, railroads and elevations are all depicted as well as color coded to the geological formations of each. Dates of surveys and work of individual cartographers and geologists are noted on many. Aesthetically and cartographically fascinating maps.
J.P. Lesley, State Geologist, wrote in the preface to this atlas, "The ... maps ... have been based upon the county maps constructed and published privately by engineers and surveyors, independently for each county. Most of these maps have been made from odometer surveys of the county roads, from surveys of railroad companies, and from data compiled from Melish's State Map, authorized by the Legislature in 1816; from private surveys, survey notes and drafts, and recorded deeds." Each is $85 except as noted
H.C. Woods after R.D. George. "Geologic Map of Colorado." Boulder: Colorado State Geological Survey, 1913. Colored wall map backed on linen. With some wrinkles and cracking to surface, and wear at edges. Still, colorful and striking appearance. Denver.
A very large and very detailed geological map of Colorado issued by the state geological survey in 1913. The map was drafted by H.C. Woods and prepared by R.D. George based on various geological surveys of the state, including that by Hayden. Along the right edge is a key explaining the colors on the map, each reflecting a different geological form. Striking and quite rare, this is an unusual map of Colorado. $650
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