Collecting Trip: Cretaceous Marine Fossils

On this field trip, we will collect fossils from the Cretaceous aged Mancos Shale.  At Stop 1 we will collect Oysters from the Tununk Member (about 92 million years old).  At Stop 2 we will collect ammonites and bivalves from the Juana Lopez Member (about 89 million years old).

Trip leader Kevin Bylund is an amateur paleontologist who has been collecting ammonites in Utah for the last 50 years (see  For the last 11 years, he has been working with scientists from Utah and Europe on Triassic ammonoids and other fossils in Utah, Nevada, and Idaho.