Where: Argentina (50.9° S, 71.7° W: paleocoordinates 51.7° S, 65.0° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Monte Leon Fm Formation, Early/Lower Miocene (23.0 - 16.0 Ma)
• STRATIGRAPHIC RELATIONS: From middle beds of the Monte Leon Fm. THICKNESS: From multiple beds within part of formation of around 100 m. AGE: Early Miocene according to molluscan biostratigraphy. Assigned to the early Early Miocene based on the the recognition of the upper RSP assemblage. STRATIGRAPHIC POSITION: From middle part of the formation.
• group of beds-level stratigraphic resolution
Environment/lithology: coastal; poorly lithified, tuffaceous sandstone and poorly lithified, sandy limestone
Size class: macrofossils
Collection methods: COLLECTOR: List includes both new collections by the author, and examination of museum and previously reported taxa. REPOSITORY: Museo Argentino de Ciencias Naturales Bernadino Rivadavia, Buenos Aires, Argentina.
Primary reference: C. J. del Rio. 2004. Tertiary Marine Molluscan Assemblages of Eastern Patagonia (Argentina): A Biostratigraphic Analysis. Journal of Paleontology 78(6):1097-1122 [L. Ivany/P. Wall/P. Wall]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 71541: authorized by Austin Hendy, entered by Austin Hendy on 28.04.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
"Turritella" ambulacrum Sowerby 1846 turret shell | |
Cirsotrema cossmanni wentletrap | |
Bivalvia | |
Crassatella kokeni clam | |
Austrocallista iheringi Cossmann 1898 venus clam | |
Cucullaea (Monteleonia) alta Sowerby 1846 clam | |
Limopsis insolita Sowerby 1846 clam | |
Crassostrea hatcheri Ihering 1899 oyster |