Mecca (RV-7713) (Miocene of the United States)

Where: Jefferson County, Oregon (44.8° N, 121.3° W: paleocoordinates 44.6° N, 115.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: John Day Formation, Early/Lower Hemingfordian (20.4 - 16.0 Ma)

• said to be early Hemingfordian based on B. submilleri

•"immediately below Tuff-2"

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; tuffaceous, brown, silty sandstone

• "blocky to nodular weathering, moderately resistant, finely to very coarsely grained, beige and brown, silty and tuffaceous sandstone, which is thickly but poorly bedded and poorly sorted"

Size class: macrofossils

Collection methods: surface (in situ),

• "Many specimens were collected in-place"

Primary reference: L. Dingus. 1990. Systematics, stratigraphy, and chronology for mammalian fossils (Late Arikareean to Hemingfordian) from the uppermost John Day Formation, Warm Springs, Oregon. PaleoBios 12(47/48):1-24 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 17966: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• stratigraphically mixed lists for RV-7712 and CIT 37 are omitted; they include an indeterminate canid and the type of Michenia deschutensis

•available KA dates of 23.4 +/- 3.3 and 22.7 +/- 2.7 Ma on plagioclase are imprecise and stratigraphically incongruent

Show authors, comments, and common names
Mammalia
 Perissodactyla - Equidae
Parahippus pawniensis, Parahippus aff. leonensis
Parahippus pawniensis Gidley 1907 anchitheriine horse
Parahippus aff. leonensis Sellards 1916 anchitheriine horse
 Artiodactyla - Merycoidodontidae
Merychyus cf. arenarum
Merychyus cf. arenarum Cope 1884 oreodont
 Artiodactyla - Dromomerycidae
Bouromeryx submilleri
Bouromeryx submilleri Frick 1937 ruminant