Where: Argentina (37.3° S, 70.5° W: paleocoordinates 36.4° S, 33.6° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Lower Member (Agrio Formation), Late/Upper Valanginian (140.2 - 136.4 Ma)
• = horizon P5
• bed-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; lithified, silty shale
•'shoreface to offshore paleoenvironments on a storm-dominated, shallow marine ramp' (see PBDB coll. 50185)
Size class: macrofossils
Primary reference: M. B. Aguirre-Urreta. 1998. The ammonites Karakaschiceras and Neohoploceras (Valanginian Neocomitidae) from the Neuquen Basin, West-Central Argentina. Journal of Paleontology 72:39-59 [M. Aberhan/S. Nurnberg]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 65449: authorized by Martin Aberhan, entered by Sabine Nürnberg on 22.09.2006
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Karakaschiceras neumayri Behrendsen 1892 ammonite | |
Olcostephanus atherstoni Sharpe 1856 ammonite |