UNC College of Arts & Sciences

Geological Sciences

Cretaceous time scale geochronology

The rates of extinction and evolution in the Cretaceous. This project, in collaboration with Tim Bralower (Penn State) is focused on refining the Cretaceous time scale by dating bentonites (altered volcanic ash) in the Great Valley Sequence of northern California. The turbidites deposited here have a rich micro- and macrofossil assemblage and plentiful intercalated ash deposits.




Drew Coleman
Subvolcanic magma accumulation rates and links between plutonic and volcanic rocks
Rates of zircon transport in the modern Amazon River
Forensic geology and geoarchaeology

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