Placerville Localities 3 + 4: Wolfcampian, Colorado

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia - Temnospondyli - Dissorophidae
Conjunctio (cf. Conjunctio) multidens Carroll 1964
Gee et al. 2021
CM 91215
unclassified
Cutleria wilmarthi n. gen., n. sp. Lewis and Vaughn 1965
1 individual
USNM 22099 (type)
Limnoscelops longifemur Lewis and Vaughn 1965
1 individual
nomen dubium belonging to Diadectomorpha
MCZ 2979
see common names

Geography
Country:United States State/province:Colorado County:San Miguel
Coordinates: 38.0° North, 108.0° West (view map)
Paleocoordinates:8.7° North, 32.9° West
Basis of coordinate:estimated from map
Altitude:7800 feet
Geographic resolution:small collection
Time
Period:Permian Epoch:Cisuralian
10 m.y. bin:Permian 1-2
Key time interval:Wolfcampian
Age range of interval:298.90000 - 286.10000 m.y. ago
Stratigraphy
Formation:Cutler
Stratigraphic resolution:group of beds
Stratigraphy comments: about 80-90 feet below top of Cutler Fm.
" [...] the present [...] study [...] has convinced us that the age is Early Permian beyond all reasonable doubt, equivalent to that of the Moran, Putnam, and Admiral Formations of Texas." (Lewis & Vaughn, 1965 p. C41). According to that statement the collection is of Wolfcampian age.
Lithology and environment
Primary lithology:desiccation cracks,very fine,fine,micaceous,red "siliciclastic"
Secondary lithology:lenticular,"cross stratification",gray,red or brown conglomerate
Includes fossils?Y
Lithology description: "In the Placerville area, the Cutler Formation is made up of interbedded, interlensing conglomerate, sandstone, siltstone, and shale. [...] The coarse clastic rock outcrops are generally a dark red to maroon, but they are gray to greenish gray in some places. [...] Crossbedding is common. Torrential deposition took place, as shown by lateral gradation, interlensing, and interbed ding between sandstone and conglomerate. No individual beds of conglomerate can be traced laterally for more than a few hundred feet. Finer grained micaceous sandstone, siltstone, and shale that weather to hematite red commonly contain bleached zones from 1 to 75 mm in diameter; these zones seemingly have organic centers. These finer clastics yielded almost all the fossil vertebrates; they contain many mud cracks and raindrop and other impressions including footprints." (Lewis & Vaughn, 1965 p. C5)
Environment:fluvial-lacustrine indet.
Geology comments: No interpretation is given by the authors. The description of the rocks suggests that they represent a playa setting with periodically active alluvial fans.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Articulated whole bodies:none
Collection methods and comments
Collection methods:bulk,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:MCZ,USNM
Metadata
Also known as:San Miguel Canyon
Database number:85475
Authorizer:J. Mueller, B. Gee Enterer:T. Liebrecht, B. Gee
Modifier:T. Liebrecht Research group:vertebrate
Created:2008-12-29 08:47:58 Last modified:2008-12-29 11:37:55
Access level:authorizer only Released:2011-12-29 08:47:58
Creative Commons license:CC BY
Reference information

Primary reference:
28872. G. E. Lewis and P. P. Vaughn. 1965. Early Permian Vertebrates from the Cutler Formation of the Placerville Area, Colorado. United States Geological Survey Professional Papers 503-C:C1-C46 [J. Mueller/T. Liebrecht/T. Liebrecht]

Secondary references:

75564 B. M. Gee, D. S. Berman, A. C. Henrici, J. D. Pardo, and A. K. Huttenlocker. 2021. New information on the dissorophid Conjunctio (Temnospondyli) based on a specimen from the Cutler Formation of Colorado, U.S.A. Journal of Vertebrate Paleontology e1877152 [B. Gee/B. Gee]