Rancholabrean
The Rancholabrean North American Land Mammal Age on the
Middle Pleistocene and Late Pleistocene epochs. The Rancholabrean is preceded by the Irvingtonian NALMA stage, and it is succeeded by the Santarosean age.[4]
The Rancholabrean can be further divided into the substages of the Sheridanian: Upper boundary source of the base of the Holocene (approximate)[5]
By another terminology, it can be split into two sub-intervals, Ra1 from 250,000 to 115,000 years ago, and Ra2 from 115,000 to 12,000 years ago.[6]
On other continents, the Rancholabrean shares this time period with the
European Land Mammal Ages, and the latter Lujanian of the South American Land Mammal Ages
.
References
- ^ Sanders, A.E., R.E. Weems, and L.B. Albright III (2009) Formalization of the mid-Pleistocene "Ten Mile Hill beds" in South Carolina with evidence for placement of the Irvingtonian–Rancholabrean boundary, Museum of Northern Arizona Bulletin 64:369-375
- ^ a b Savage, D.E. (1951) Late Cenozoic vertebrates of the San Francisco Bay region, University of California Publications, Bulletin of the Department of Geological Sciences 28:215-314
- ISBN 0-231-13040-6.
- ISSN 2053-0196.
- ^ Paleobiology Database, Sheridanian substage
- ^ "Rancholabrean North American Land Mammal Age". Florida Museum. 2017-03-28. Retrieved 2021-07-25.