Where: Santa Cruz, Argentina (51.6° S, 72.3° W: paleocoordinates 54.1° S, 62.8° W)
When: Cerro Dorotea Formation, Selandian (61.6 - 59.2 Ma)
• No comments about stratigraphy.
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•More precise dating sourced from zircon ages in Fosdick et al. 2015. Formation assumed to be Cerro Dorotea.
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•"Cerro Dorotea Formation: Detrital zircon geochronology from three stratigraphic horizons (225 grains) within the mapped Cerro Dorotea Fm. near Cerro Castillo reveals an upward decreasing youngest age peaks, major age populations between 60-66 Ma, 74-115 Ma, 123-160 Ma, 473-630 Ma, 960-1130 Ma, and lesser numbers of Proterozoic and lower Paleozoic ages (Fig. 2). Youngest detrital age populations yield MDA estimates of 61.9 ± 0.3 Ma (n = 4) and 60.5 ± 0.8 (n = 3) for the uppermost samples, collected from thick-bedded, trough cross-bedded tan-yellow sandstone and orange brown sandstone with interbedded siltstone and coal-bearing mudstone, respectively."
Environment/lithology: basinal (); sandstone and mudstone
Size class: macrofossils
Collection methods: bulk,
Primary reference: O. Wilckens. 1907. Die Lamellibrachiaten, Gastropoden ect. aus der oberen Kreide Südpatagoniens. Berichte der Naturforschenden Gesellschaft zu Freiburg, Breisgau 15:97-166 [M. Clapham/J. Fearon/J. Fearon]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 235520: authorized by Matthew Clapham, entered by J Fearon on 15.07.2024
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium sp. Linnaeus 1758 tusk shell | |
Bivalvia | |
Malletia rudis Wilckens 1907 clam | |
Astarte venatorum Wilckens 1907 clam | |
"Panopaea sp." = Panopea
"Panopaea sp." = Panopea Menard 1807 clam | |
Gastropoda | |
Aporrhais gregaria Wilckens 1907 snail |