Where: San Juan County, New Mexico (36.3° N, 108.2° W: paleocoordinates 42.9° N, 88.3° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Nacimiento Formation, Torrejonian (63.8 - 60.9 Ma)
• show by Tomida as near the top of a normal zone, but near the middle of a normal magnetic polarity zone in the Kutz Canyon section interpreted as C28n based on the position of the K-T boundary in the correlative Barrel Spring Arroyo = De-na-zin Wash section: see Butler et al. 1977, Lucas et al. 1997
• group of beds-level stratigraphic resolution
Environment/lithology: terrestrial
Primary reference: Y. Tomida. 1981. "Dragonian" fossils from the San Juan Basin and status of the "Dragonian" Land Mammal "age". In S. G. Lucas, J. K. Rigby Jr., B. S. Kues (eds.), Advances in San Juan Basin Paleontology 222-241 [J. Alroy/J. Alroy/M. Uhen]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 14862: authorized by John Alroy, entered by John Alroy on 18.02.1993
Creative Commons license: CC BY (attribution)
Taxonomic list
more precise than the list given by Taylor 1981
Mammalia | |
Protictis cf. haydenianus Cope 1882 placental | |
| |
Tetraclaenodon puercensis2 Cope 1881 condylarth from NMMNH 2660, "approximately equivalent" to UALP 7897 and 7899
| |
cf. Mioclaenus turgidus Cope 1881 condylarth |