Tongoy area, Coquimbo Formation, Unit 16: Calabrian, Chile

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Thecostraca - Balanomorpha - Balanidae
Balanus sp. Da Costa 1778
see common names

Geography
Country:Chile
Coordinates: 30.3° South, 71.5° West (view map)
Paleocoordinates:30.4° South, 71.2° West
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Quaternary Epoch:Pleistocene
Stage:Calabrian 10 m.y. bin:Cenozoic 6
Key time interval:Calabrian
Age range of interval:1.80000 - 0.77400 m.y. ago
Stratigraphy
Formation:Coquimbo
Stratigraphic resolution:group of beds
Stratigraphy comments: 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
Lithology and environment
Primary lithology:"cross stratification" lithified sandstone
Secondary lithology: lithified "limestone"
Lithology description: sandstone, cross-stratified, limestone
Environment:transition zone/lower shoreface
Geology comments: The overall grainsize of this facies suggests a transitional environment (middle shoreface deposits).
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:68324
Authorizer:M. Aberhan Enterer:S. Nurnberg
Modifier:J. Alroy Research group:marine invertebrate
Created:2007-01-16 00:46:56 Last modified:2007-07-03 12:19:09
Access level:the public Released:2007-01-16 00:46:56
Creative Commons license:CC BY
Reference information

Primary reference:
19640. 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]