Geologic age and fossil types source material: Vince Santucci, National Park Service Geologic Resources Division data primarily from NPS paleontological inventory reports published between September 2002 and November 2011. Justin Tweet (GeoCorps America) revised and improved fossil data, 2012
Data gathering and upload: David K. Smith, UC Museum of Paleontology
Maps: Google Maps
Original launch: October 2011
Update history: NPS-provided data input May 2012; better NPS data for all parks input October 2012