Descrição do livro
Geological Survey Bulletin by M.S. Bright; W. P. Flynn; F. E. Fellows; J. H. Wilke. This bulletin presents detailed geodetic field reports and resource geology studies from the early 20th century. It documents California spirit leveling conducted between 1907 and 1910, describing precise and primary leveling methods, bench-mark types, data-collection standards, and elevations tied to mean sea level, along with corrections and potential adjustments to published values. The volume also includes a statewide Montana leveling compilation (1896–1910) with station descriptions and notes on data reliability, plus a 1911 economic geology study of Richmond, Virginia and vicinity focusing on granite, brick clays, and molding sands, including stratigraphic relations, quarrying history, and resource analyses. The work is complemented by a comprehensive Connecticut granite quarry survey detailing rock types, textures, quarry operations, and the economics of quarrying for building and monumental stone. The bulletin exemplifies early 20th-century geodesy and resource geology, with plates and maps illustrating bench marks, quarries, and stratigraphic contacts.
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