Tongoy area, Coquimbo Formation, Unit 16 (Pleistocene of Chile)

Where: Chile (30.3° S, 71.5° W: paleocoordinates 30.4° S, 71.2° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Coquimbo Formation, Calabrian (1.8 - 0.8 Ma)

• Unit 15 was Sr dated at 1.4 Ma, extrapolating the same rate of sedimentation would give a mean age of 1.2 Ma for Unit 16

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified sandstone and lithified limestone

• The overall grainsize of this facies suggests a transitional environment (middle shoreface deposits).
• sandstone, cross-stratified, limestone

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 68324: authorized by Martin Aberhan, entered by Sabine N├╝rnberg on 16.01.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Thecostraca
 Balanomorpha - Balanidae
Balanus sp. Da Costa 1778 barnacle