ammonites
banner
Gateway to the Paleobiology Database
west of Chaco Canyon, Ojo Alamo (AMNH) (Cretaceous of the United States)

Also known as Willow Wash, Kritosaurus navajovius type

Where: San Juan County, New Mexico (36.3° N, 108.2° W: paleocoordinates 43.5° N, 79.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: De-na-zin Member (Kirtland Formation), Late/Upper Campanian (84.9 - 70.6 Ma)

• Called "Ojo Alamo Beds" originally.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; shale and sandstone

• "conglomerate composed of red, gray, yellow, and white pebbles...Below the conglomerate is a series of shales and sandstones evenly stratified and usually horizontal, in which there is much less cross-bedding than commonly occurs in the Laramie Formation...The shales...I shall designate as the Ojo Alamo Beds...Most of this [fossil] material was chalcedonized."

Size class: macrofossils

Collected by B. Brown in 1904; reposited in the AMNH

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

Primary reference: Anonymous. 1905. Department of Vertebrate Paleontology. The American Museum Journal 5(1):9-11 [M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 35518: authorized by Matthew Carrano, entered by Matthew Carrano on 19.12.2003, edited by Roger Benson

Creative Commons license: CC BY (attribution)