Preliminary report on the geology and deposits of monazite, thorite, and niobium-bearing rutile of the Mineral Hill district, Lemhi County, Idaho

The geologic occurrence of monazite

“…In 1952 the Mineral Hill district was observed by Abbott ( 1954, p. 2) to be far more extensively mineralized than was noted at the time of discovery. Since then the size and origin of the deposits in both districts have received considerable attention (Sharp and Cavender, 1953;Kaiser, 1956;W eis and others, 1958, p. 39-40;Anderson, A. L., 1958, p. 21-77;, p. 1180-1201.…”