Robuta

https://www.usgs.gov/publications/porosity-trends-lower-cretaceous-j-sandstone-denver-basin-colorado
This study examines relationships between porosity and time-temperature history, and the influence of rock properties upon porosity, for the Lower Cretaceous J...
lower cretaceousdenver basinporositytrendsj
https://www.usgs.gov/publications/coal-denver-basin-colorado-south-park-coal-field-colorado-colorado-springs-coal-field
No abstract available.
denver basinsouth parkcoalcolorado
https://www.denvergazette.com/tag/arapahoe-basin/page/2/
arapahoe basindenver gazettearchives