Reference 3034

Abstract

Tephra layers volcanic ash and tuff beds of late Cenozoic age in east-central and southern California are identified and correlated by the chemical composition of volcanic glass, stratigraphic criteria, and petrographic characteristics. Among widespread tephra units identified are the Lava Creek ash bed 0.62 m.y., the Bishop ash bed 0.73 m.y., and the Huckleberry Ridge ash bed 2.01 m.y.. All three are identified for the first time in marine strata. Identification of these and other tephra units permits correlation of upper Cenozoic sedimentary strata deposited in marine, fluvial, and lacustrine environments and helps reconcile provincial marine and continental biostratigraphic chronologies.

49 samples from this reference