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Tongoy area, Coquimbo Formation, Unit 11 (Pliocene of Chile)

Where: Chile (30.3° S, 71.5° W: paleocoordinates 30.5° S, 70.5° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Coquimbo Formation, Zanclean (5.3 - 3.6 Ma)

• Unit 11 is assigned to an age of 5.3 Ma

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified sandstone and poorly lithified claystone

• The very fine grain size of this unit suggests a low-energy, relatively deep-water environment... considered to represent inner bay sediments in relatively deep water (100-140 m).
• sandstone, clay, lower flow regime planar laminae

Size class: macrofossils

Primary reference: J. P. Le Roux, D. M. Olivares, S. N. Nielsen, N. D. Smith, H. Middleton, J. Fenner, and S. E. Ishman. 2006. Bay sedimentation as controlled by regional crustal behaviour, local tectonics and eustatic sea-level changes: Coquimbo Formation (Miocene-Pliocene), Bay of Tongoy, central Chile. Sedimentary Geology 184:133-153 [M. Aberhan/S. Nurnberg] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 68271: authorized by Martin Aberhan, entered by Sabine Nürnberg on 12.01.2007

Creative Commons license: CC BY (attribution)