Author: CALIFORNIA DIVISION OF MINES AND GEOLOGY
Title: Mineral Resources of California Bulletin 191
Description: Sacramento, CA: California Division of Mines, 1978. 3rd Printing. Paperback. B&W Illustrations; This is a trade sized paperback book. The book is in Very Good+ condition and was issued without a dust jacket. The book and its contents are in clean, bright condition. The text pages are clean and bright. There is a map in clean bright condition in a pocket at the rear of the book. "A 'Mineral Resource' is a concentration or occurrence of material of intrinsic economic interest in or on the earth's crust in such form, quality and quantity that there are reasonable prospects for eventual economic extraction. Mineral Resources are further sub-divided, in order of increasing geological confidence, into inferred, Indicated and measured Categories. Inferred Mineral Resource is the part of a mineral resource for which tonnage, grade and mineral content can be estimated with a low level of confidence. It is inferred from geological evidence and assumed but not verified geological or grade continuity. It is based on information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes which may be of limited or uncertain quality and reliability. ". Very Good+ .

Keywords: Geology California Division Of Mines Natural Resources Mineral Resources Mines Geology


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