Also known as Comb Ridge

Where: San Juan County, Utah (37.4° N, 109.6° W: paleocoordinates 24.4° N, 47.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Navajo Sandstone Formation (Glen Canyon Group), Pliensbachian to Pliensbachian (190.8 - 174.1 Ma)

• "Early Jurassic... at the base of the Navajo Sandstone, one meter above an interbedded mudstone and sandstone facies of the Kayenta Formation..."

•

•Navajo Sandstone forms uppermost part of Glen Canyon Group, and is Early Jurassic, but probably not older than Pliensbachian (Irmis 2005. A review of the vertebrate fauna of the Lower Jurassic Navajo Sandstone in Arizona. Mesa Southwest Museum Bulletin 11:55–71)

• bed-level stratigraphic resolution

Environment/lithology: eolian; lithified, massive sandstone

Size class: macrofossils

• Specimen is believed to have been originally complete but most lost via erosion

Collection methods: bulk, quarrying, surface (in situ), mechanical,

• Utah Museum of Natural History collection

•"discovered and reported" by Joe Pachek and "extracted" using an "industrial cut-off saw" after which "the blocks were prepared using pneumatic air scribes and needles"

Primary reference: J. J. W. Sertich and M. A. Loewen. 2010. A new basal sauropodomorph dinosaur from the Lower Jurassic Navajo Sandstone of southern Utah. PLoS One 5(3):e9789 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 94804: authorized by John Alroy, entered by John Alroy on 23.03.2010

Creative Commons license: CC BY (attribution)