Download or read book Internal Structure of Granitic Pegmatites written by Eugene Nathan Cameron and published by . This book was released on 1949 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of strategic mineral deposits in the major domestic pegmatite districts by the U.S. Geological Survey from 1939-1945 resulted in the clarification of many problems related to the internal structure, mineralogy and origin of granitic pegmatites. This report summarises about 68 man years of work in the pegmatite districts of New England, the Southeastern States, South Dakota, Idaho, Montana, Wyoming, Colorado, and New Mexico.