Where: Calvert County, Maryland (38.6° N, 76.5° W: paleocoordinates 38.8° N, 73.6° W)
• coordinate estimated from map
When: Calvert Beach Member (Calvert Formation), Serravallian (13.8 - 11.6 Ma)
• Zones 14-16A are regarded as Serravallian in age.
• group of beds-level stratigraphic resolution
Environment/lithology: coastal; yellow, sandy claystone
Size class: macrofossils
Preservation: original phosphate
Reposited in the USNM
Collection methods: surface (in situ),
Primary reference: G. B. Shattuck. 1904. Geological and paleontological relations, with a review of earlier investigations. Maryland Geological Survey Miocene Text xxxiii-clv [M. Uhen/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 70822: authorized by Mark Uhen, entered by Mark Uhen on 09.04.2007, edited by Evangelos Vlachos
Creative Commons license: CC BY (attribution)
Taxonomic list
| Reptilia | |
|
Procolpochelys grandaeva Leidy 1861 sea turtle Carapace (USNM 24889) including nuchal; split neurals 1b, 2a, 2b, 3a, 3b, 4a, and 5a; parts of left costals 1–6; right costals 1–6 and 8; fragment of suprapygal; and first right peripheral, collected by Robert A. Graham and Robert E. Weems, upper SZ 15A, about 0.3 m (1 foot) below base of SZ 15B (Weems et al., 2017). Carapace fragment (USNM 24888) including split neurals 6b, 6a, 7b, 8a, and 8b; suprapygal; pygal; left costals 1–8; portions of right costals 5–8; left peripherals 1, 3–9, and 11, plus left hyoplastron, left hypoplastron, left xiphiplastron, left quadrate basioccipital, right opisthotic, part of left parietal, left humerus, four metacarpals, two phalanges, right ilium, and left femur, collected by albert C. Myrick Jr., John S. Moses, and Robert E. Weems from upper SZ 15A, about 0.3 m (1 foot) below base of SZ 15B (Weems et al., 2017), Plum Point Member, Calvert Formation; eastern end of Stratford Cliffs, 15.24 cm (0.5 foot) above beach, Stratford Hall, Westmoreland County, Virginia.
| |