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Mt. Kirkpatrick, Beardmore Glacier (Jurassic to of Antarctica)

Also known as NSF-Augustana College

Where: Antarctica (84.3° S, 166.5° E: paleocoordinates 57.5° S, 35.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hanson Formation, Sinemurian to Sinemurian (196.5 - 183.0 Ma)

• collected within 1 m stratigraphically and 5 m laterally, except for "3 bones", including pterosaur (which came from 50 m below). Often described as from high in the Falla Fm. but actually from low in the Hanson.

•"The presence of Dicroidium odontopteroides in the Falla Formation 300 meters below the vertebrate bearing layers of the Hanson Formation, and pollen and spore assemblages from the middle part of the Falla Formation provide an upper bound of Carnian–Norian (Late Triassic) for the base of the Hanson Formation (Kyle and Schopf 1982; Farabee et al. 1989; Elliot 1996). A radiometric date of 177±2 Ma of the overlying Prebble Formation and Kirkpatrick Basalt (Heimann et al. 1994) gives a lower bound of Aalenian (earliest Middle Jurassic) for the top of the Hanson Formation. Additional radiometric dates from the top of the Hanson Formation, including a K−Ar date of 203±3 Ma (Barrett and Elliot 1972), and an Rb−Sr isochron date of 186±9 Ma (Faure and Hill 1973), suggest that the lower part of the Hanson Formation, which includes the vertebrate−bearing horizons, is probably middle Early Jurassic (Elliot 1996)." (Smith & Pol 2007:658-659).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; tuffaceous siltstone

• "The Hanson Formation was deposited in an active volcano-tectonic rift system formed during the breakup of Gondwana" (Smith & Pol 2007:658)

•"fluviatile"; "foreland basin flood plain"

• "tuffaceous siltstone"

Size classes: macrofossils, mesofossils

Collected in 1990-1991; reposited in the FMNH

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

• 120-140 bones and 16 teeth in total

Primary reference: W. R. Hammer and W. J. Hickerson. 1993. A new Jurassic dinosaur fauna from Antarctica. Journal of Vertebrate Paleontology 13(3, suppl.):40A [M. Carrano/M. Carrano] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 47135: authorized by Matthew Carrano, entered by Matthew Carrano on 15.02.2005, edited by Steven Miller

Creative Commons license: CC BY (attribution)