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Fossils
Crinoid
Brachiopod
Gastropoda
Bryozoan
Coral
Bivalves
CephalopodsNautiloids, ammonoids
Trilobites
http://www.freewebs.com/mosasaurfiend/northernarkansas.htm
Fossils
Crinoid
Brachiopod
Gastropoda
Bryozoan
Coral
Bivalves
CephalopodsNautiloids, ammonoids
Trilobites
• DLESE Teaching Boxes: Evidence for Plate Tectonics •The Paleontology Portal• Tour of Geologic Time• Understanding Geologic Time• USGS Fossils, Rocks and Time• USGS Geologic Time online edition
http://www.freewebs.com/mosasaurfiend/northernarkansas.htm