Also known as ETE Locality 1588, BMQ, 1B7, 2DU, 3BS
Where: Comanche County, Texas (32.0° N, 98.5° W: paleocoordinates 30.1° N, 53.3° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Twin Mountains Formation (Trinity Group), Late/Upper Aptian (122.5 - 113.0 Ma)
• ETE dating method: time_unit, ETE age comment: . radiometric intage_max, radiometric intage_min
•
•low in Twin Mountains Fm.
• bed-level stratigraphic resolution
Environment/lithology: "floodplain"; bioturbated, paleosol/pedogenic, green claystone and siltstone
•"upland fluvial overbank sediments"; "semiarid to arid climatic conditions"
•"five meters of green-mottled red clay, silt, and sand. Much of the sediment is massive owing either to original deposition or to bioturbation. Structures that are preserved, such as climbing ripples and settle-out laminae, are characteristic of low-energy deposition. Calcium carbonate nodules are common in the clays and silts...Sandstone dikes are present...V-shaped cracks outlined by green mottling and nodules form polygons that are one to two meters in diameter in plan view...The shape and sediment filling of these features suggest deep mud cracks on the floodplain."
•"the fossil bearing strata consist of 2 meters of reddish muds and sands. The cross-sectional profile contains stacked B horizons classified as well-developed calcic Vertisols which are interpreted to represent a semi-arid floodplain. Weathering indices of matrix collected from the paleosols estimate mean annual precipitation of ~330 mm/yr while crystallization temperature of pedogenic phyllosilicates indicate mean annual temperature of ~30 ± 3° C (approximately 13° C higher than modern temperatures at the same latitude)."
Size class: macrofossils
Collected by D. Winkler in 1985
Collection methods: quarrying, mechanical,
• ETE Size: .; ETE reference list: 478, 482, ; ETE museum list:
•two main quarries are combined here: North Quarry and Camp Quarry. They are about 0.2 miles apart.
Primary reference: D. A. Winkler, P. A. Murray, L. L. Jacobs, W. R. Downs, J. R. Branch and P. Trudel. 1988. The Proctor Lake dinosaur locality, Lower Cretaceous of Texas. Hunteria 2(5):1-8 [A. Behrensmeyer/A. Behrensmeyer/M. Carrano]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 22713: authorized by Anna Behrensmeyer, entered by Anna Behrensmeyer on 29.05.2001, edited by Philip Mannion and Matthew Carrano
Creative Commons license: CC BY (attribution)
Taxonomic list
| Reptilia | |
Convolosaurus marri n. gen. n. sp.4
Convolosaurus marri n. gen. n. sp.4 Andrzejewski et al. 2019 ornithopod SMU 70444, 70445, 70456, 70534, etc. (488 total specimens)
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