Title: National coal resource assessment non-proprietary data
Description: Non-proprietary data from more than 18,000 oil and gas wells, coal drill holes, and outcrop measured sections collected from the Powder River, Williston, Hanna, Carbon, and Greater Green River basins.
Subjects: Coal, Statistics, Stratigraphic Geology, Coal reserves, Geology
Places: Great Plains, Rocky Mountains
Time periods: Tertiary