Where: New Mexico (35.8° N, 106.9° W: paleocoordinates 5.8° S, 44.1° W)
• local area-level geographic resolution
When: Arroyo Penasco Formation, Carboniferous (360.7 - 298.9 Ma)
• The Arroyo Penasco Fm. is underlain unconformable by Precambrian rocks and overlain unconformably by Pennsylvanian rocks. The fossils in this collection were found 110-130 ft. above the Precambrian rock.
Collection methods: chemical, peel or thin section, sieve,
Primary reference: A. K. A. Armstrong. 1967. Biostratigraphy and Carbonate Facies of the Mississippian Arroyo Penasco Formation, North - Central New Mexico. State Bureau of Mines and Mineral Resources New Mexico Institute of Mining and Technology (20)22-53 [T. Olszewski/M. Gibson] more details
PaleoDB collection 12913: authorized by Tom Olszewski, entered by Melissa Gibson on 02.01.2002