@misc{indiciae47027dc8f2bd,
  title = {Geology, thermal maturation, and source rock geochemistry in a volcanic covered basin: San Juan sag, south-central Colorado},
  author = {R. R. Gries and J.L. Clayton and C. Leonard},
  year = {1997},
  doi = {10.1306/522b4a05-1727-11d7-8645000102c1865d},
  url = {https://pubs.usgs.gov/publication/70019673},
  note = {Source identifier: 70019673}
}