Skip to Main Content
Skip Nav Destination

The stratigraphic section located at Toadstool Park, northwestern Nebraska, preserves a detailed sedimentological and fossil record of the Eocene-Oligocene boundary, yet chronologic control is limited to sparse ash dates and magnetostratigraphy. To improve the chronologic control of the Toadstool Park sediments, we examined the fossil collection at the University of Nebraska State Museum and recorded the stratigraphic level of some important biochronologic events. All stratigraphic levels were determined relative to the Upper Purplish White layer (UPW), a distinctive ash that is chemically and mineralogically correlated to an ash dated at 34.6 ± 0.1 Ma. The small artiodactyls Leptomeryx speciosus, Leptomeryx...

You do not currently have access to this chapter.

Figures & Tables

Contents

References

Related

Citing Books via

Close Modal

or Create an Account

Close Modal
Close Modal