Stratigraphy & Fauna

Stratigraphic column shows four different Precambrian-Cambrian boundaries

because in the past, the boundary has been placed at:

(1) the occurrence of Fallotaspis within the Campito Formation

(2) the earliest occurrence of trilobite trace fossils

(3) the base of the occurrence of the "mollusc" Wyattia

(4) the base of the conformable succession below the Noonday Dolomite in the Death Valley region

Page created by Brian Holt and Cheri Taylor

U. C. White Mountain Research Station, 1999 in cooperation with