Where: Antarctica (64.3° S, 56.8° W: paleocoordinates 62.3° S, 67.6° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Lopez de Bertodano Formation (Seymour Island Group), Late/Upper Campanian to Late/Upper Campanian (83.5 - 61.6 Ma)
• Section B1 have 210 m. The section contains 112 samples: 01-112.
•The formation was subdivided into 10 lithologic units by Macellari (1984b, 1988). Units 1 to 9 (~1100 m thick) span the upper Campanian and Maastrichtian,and the uppermost Unit 10 (up to 90m thick) is Tertiary (Danian).The formation is disconformably overlain by deltaic sediments of the Paleocene Sobral Formation.
• formation-level stratigraphic resolution
Environment/lithology: marginal marine; silty, sandy lithology not reported
•Although Mesozoic tectonic reconstructions of the Antarctic Peninsula- South America region are not universally accepted, it is generally agreed that the James Ross Island basin contains sedimentary and volcanic strata deposited in a back-arc terrain (e.g. Elliot 1988).
Size class: microfossils
Preservation: original sporopollenin
Reposited in the USNM
• Spores from the Cretaceous part of the Lopez de Bertodano Formation discussed here are from a discontinuous section ( A5 through A11) collected during reconnaisance field-work in 1982, and section B1 collected in 1983/84. Another 12 samples from section A19 were examined. Samples were taken from holes dug about 10-30 cm into well-exposed outcrop, in part to avoid surficial slope wash. Surface weathering was not significantat most of these localities, although samples were collected from freshly exposed escarpments where possible.
•Material will be housed in the National Museum of Natural History, Smithsonian Institution, Washington, D.C.
Primary reference: R. A. Askin. 1990. Cryptogam spores from the upper Campanian and Maastrichtian of Seymour Island, Antarctica. Micropaleontology (36)141-156 [C. Jaramillo/C. Jaramillo]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 167588: authorized by Carlos Jaramillo, entered by Carlos Jaramillo on 24.03.2015
Creative Commons license: CC BY (attribution)