Locality KD Weathered Boulder site: Kungurian, Texas
collected by E. C. Olson, E. L. Yochelson, S. H. Mamay 1946-1948, 1955

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Amphibia - Diplocaulidae
Diplocaulus recurvatus Olson 1952
Molgophidae
Lysorophus tricarinatus Cope 1877
Reptilia - Captorhinidae
? Captorhinus sp. Cope 1896
Captorhinikos valensis Olson 1954
Chondrichthyes - Xenacanthiformes - Xenacanthidae
Xenacanthus sp. Beyrich 1848
see common names

Geography
Country:United States State/province:Texas County:Knox
Coordinates: 33.7° North, 99.6° West (view map)
Paleocoordinates:2.4° North, 29.0° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period: Permian Epoch: Cisuralian
Stage: Kungurian 10 m.y. bin: Permian 2
Key time interval: Kungurian
Age range of interval: 283.5 - 273.01 m.y. ago
Stratigraphy
Geological group:Clear Fork Formation:Vale Member:"Bullwagon"
Stratigraphic resolution:bed
Stratigraphy comments: "Robert Roth, of the Humble Oil and Refining Company of Wichita Falls, Texas, believes that surfacer and subsurface data show that the beds in question are part of the 'Bullwagon' member of the Vale formation. This places the section high in the Vale, just below the Choza." Olson (1948 p. 190);
the base and top of the Clear Fork Group (i.e., Arroyo, Vale, and Choza formations) are both within the Kungurian: see Wardlaw 2005 (Permophiles) for the base, and DiMichele et al. 2001 (J Paleont) for the top
Lithology and environment
Primary lithology:pebbly,green,red conglomerate
Secondary lithology:lenticular siltstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "The channel fill is largely clay pebble conglomerate, with pebbles ranging from a few millimeters to about 8 cm. in diameter. Rounding of the pebbles is uniformly high, but sphericity is varied. [...] The coarsest material tend to lie at the center of the channel, whereas the marginal parts are predominantly sand or clay with fine scattered pebbles." Olson (1948, p. 191)
Environment:dry floodplain Tectonic setting:foreland basin
Geology comments: "The channels are evidence that a rather large, braided stream passed north or south over the area in a valley of considerable width. The region must have had a moderately high annual rainfall to support the fauna and flora. The total rainfall was perhaps not greatly different from what it is today, and the temperature may have been quite similar, with possibly less seasonal variation. The rains, however appear to have been periodic and torrential [...] " Olson (1948, p. 192)
Taphonomy
Modes of preservation:body
Size of fossils:mesofossils
Preservation of anatomical detail:variable
Fragmentation:occasional
Temporal resolution:snapshot
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collectors:E. C. Olson, E. L. Yochelson, S. H. Mamay Collection dates:1946-1948, 1955
Collection method comments: Olson (1958) divided the main locality into Quarry Site and Weathered Boulder Site, leaving the main one for recording scattered finds
Metadata
Database number:177015
Authorizer:R. Butler Enterer:E. Dunne
Modifier:E. Dunne Research group:vertebrate
Created:2016-03-16 05:07:51 Last modified:2018-01-24 10:49:07
Access level:the public Released:2016-03-16 05:07:51
Creative Commons license:CC BY
Reference information

Primary reference:
58444. E. C. Olson. 1958. Fauna of the Vale and Choza: Summary, Review, and Integration of the Geology and the Faunas. Fieldiana Geology 10(32):397-448 [R. Butler/E. Dunne]