Rak Division (Miocene of the United States)
Also known as Third Division
Where: San Bernardino County, California (34.8° N, 117.0° W: paleocoordinates 34.1° N, 112.3° W)
• coordinate based on political unit
When: lower Middle Member (Barstow Formation), Barstovian (16.3 - 12.5 Ma)
Environment/lithology: terrestrial
Primary reference: M. O. Woodburne, R. H. Tedford, and C. C. Swisher, III. 1990. Lithostratigraphy, biostratigraphy, and geochronology of the Barstow Formation, Mojave Desert, southern California. Geological Society America Bulletin 102(4):459-477 [J. Alroy/J. Alroy/J. Alroy]more details
PaleoDB collection 19510: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
• above Rak Tuff (KA 16.3 +/- 0.3 Ma), below Oreodont Tuff (Ar-Ar 15.8 +/- 0.09 Ma)
see also Coon Canyon (UALP 9009), Ledge 3, Unknown Quarry, Waterfall Canyon
"unnamed fauna" from middle of middle mbr. of Kelly and Lander 1988 appears to include Steepside Quarry in the Green Hills fauna
see also Coon Canyon (UALP 9009), Ledge 3, Unknown Quarry, Waterfall Canyon
"unnamed fauna" from middle of middle mbr. of Kelly and Lander 1988 appears to include Steepside Quarry in the Green Hills fauna
Show authors, comments, and common names
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Protomarctus optatus5 Matthew 1924 bone-crushing dog Rak Division; Third Division; possibly includes "Tomarctus cf. rurestris"
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Paramiolabis cf. tenuis1, Paramiolabis minutus n. sp.2, Paramiolabis cf. singularis1, Protolabis sp., Michenia mudhillsensis2, Aepycamelus sp.
Protolabis sp. Cope 1876 camel
Aepycamelus sp. Macdonald 1956 camel | |
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