Also known as BADL-LOC-0293

Where: Pennington County, South Dakota (43.9° N, 102.2° W: paleocoordinates 45.0° N, 93.9° W)

• coordinate estimated from map

When: Or1 mammal zone, Orellan (33.9 - 33.3 Ma)

• "...These data suggest that the Chadronian–Orellan boundary may be located within the upper Chadron Formation in South Dakota if a complete stratigraphic section were preserved. Therefore, recogni- tion of an earliest Orellan fauna situated below the BBLB would not necessarily contradict prior placement of the BBLB within the upper-most Chadron Formation or at the Chadron–Brule contact. However, that placement would require the sediments containing the Bloom Basin local fauna to be correlative with the Big Cottonwood Creek Member of Nebraska. Alternatively, the age of the Bloom Basin local fauna may indicate that the BBLB is posi- tioned stratigraphically higher than previously proposed, within the Scenic Member of the Brule Formation..."

Environment/lithology: terrestrial; lithology not reported and limestone

Size classes: macrofossils, mesofossils

Collection methods: surface (float), surface (in situ), mechanical,

Primary reference: C. A. Boyd and E. Welsh. 2014. Description of an Earliest Orellan Fauna From Badlands National Park, Interior, South Dakota and Implications for the Stratigraphic Position of the Bloom Basin Limestone Bed. Dakoterra 6:124-147 [J. Marcot/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 163487: authorized by Jonathan Marcot, entered by Jonathan Marcot on 30.10.2014

Creative Commons license: CC BY (attribution)