Full Title: The Blue Diamond Landslide: A Tertiary Breccia Deposit in the Las Vegas Area, Clark County, Nevada
Compilers: William R. Page, Gary L. Dixon, and Jeremiah B. Workman
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One color sheet, 23" X 27". From text: A newly mapped landslide breccia deposit, here named the Blue Diamond landslide, once extended over an area of ~25 km2 or more in the Blue Diamond area, 16 km west of Las Vegas, Nevada. Now only remnants of the well-consolidated deposit remain; they cap low hills and rest uncomformably on mostly folded Mesozoic rocks in the lower plate of the Wilson Cliffs and Keystone thrust plates. The deposit slid nearly 10 km from its probable source area in the eastern Spring Mountains. The maximum thickness of the deposit is 60 m. Breccia clasts are chaotically mixed and highly rotated, subangular to subrounded, poorly sorted, and are composed predominantly of Devonian and Mississippian carbonate rocks. Clasts usually average less than 1 m in diameter but are as large as 20 m. The breccia deposit has clearly undergone sliding, for in some locations, a shear-slip surface and accompanying fault gouge crops out along the contact with the underlying Mesozoic strata.
Published: 1/01/1998
Pages: 12 plus 1 sheet
Product Category: Maps and Charts
