Parsons, Willard Hall, 1911-
Parsons, Willard Hall, 1911-
Middle Eocene pyroclastic rocks in the Absaroka Mountains and Yellowstone National Park have been divided into early acid breccias, early basic breccias, late acid breccias, and late basic breccias with early and late basalt sheets. Near intrusive centers, these pyroclastic rocks are volcanic breccias, tuff breccias and agglomerates with a small percentage of interbedded tuffs and lava flows.
GEOLOGY-VOLCANISM(PARSONS)
Origin of tertiary volcanic breccias, Wyoming
Origin of tertiary volcanic breccias, Wyoming
Origin of tertiary volcanic breccias, Wyoming
Report of the International Geological Congress,. 1960, 21st session, part 13.
Origin of tertiary volcanic breccias, Wyoming
Parsons, Willard Hall, 1911-