Also known as Fruita Paleontological Area, LACM Loc. 4684, 6174, CO-33
Where: Mesa County, Colorado (39.1° N, 108.8° W: paleocoordinates 35.6° N, 56.1° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Brushy Basin Member (Morrison Formation), Early/Lower Tithonian (150.8 - 145.0 Ma)
• Base of the Brushy Basin Member of the Morrison Formation immediately above the "clay change" horizon (see Kirkland 2006, New Mexico Museum of Natural History and Science Bulletin, 36:67-95, fig. 6, pg. 93). Turner & Peterson (1999, Vertebrate Paleontology in Utah, Utah Geol. Survey Misc. Publ. 99-1, 77-114) placed the Fruita localities (listed as CO-33 in their stratigraphic sections) within the Kimmeridgian, and within their "Dinosaur Zone 2" and "charophyte-ostracod Zone 4". Stratigraphic horizons closely equivalent to the Fruitadens quarries yield 40Ar/39Ar isotopic dates of 150.3 +/- 0.3 Ma and 150.2 +/- 0.5 Ma (see Turner & Peterson 1999). This would place the Fruita quarries within the early Tithonian on recent timescales.
• group of beds-level stratigraphic resolution
Environment/lithology: "floodplain"; sandstone and siltstone
Size classes: macrofossils, mesofossils
Preservation: trace
Collected by G. L. Callison & party in the 1970s to early 1980s; reposited in the LACM
Collection methods: bulk, quarrying, surface (float), surface (in situ), mechanical,
Primary reference: Anonymous. 1977. The Fruita Paleontological Report 1-82 [M. Carrano/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 71476: authorized by Matthew Carrano, entered by Matthew Carrano on 26.04.2007, edited by Roger Benson
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
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Fruitadens haagarorum n. gen. n. sp.1
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Macelognathus vagans6 Marsh 1884 crocodilian LACM 4684/1282772 (L femur), 4684/133772 (cranial elements)
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"Parviraptor gilmorei n. sp." = Diablophis gilmorei3
"Parviraptor gilmorei n. sp." = Diablophis gilmorei3 Evans 1996 snake LACM 4684/140572, 5572/120732, 5572/135535, 5572/135513, 5573/135533
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Mammalia | |
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Glirodon grandis2 Engelmann and Callison 1999 multituberculate LACM 120453 (partial skull), 120452 (mandible), 120688 (partial mandible), 120458 (maxilla)
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