Duncans Quarry: Early Miocene, Jamaica

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Malacostraca - Decapoda - Majidae
Nemausa windsorae Klompmaker 2015
Mithrax arawakum Klompmaker 2015
see common names

Geography
Country:Jamaica County:Trelawny
Coordinates: 18.5° North, 77.6° West (view map)
Paleocoordinates:
Basis of coordinate:stated in text
Time
Period: Neogene Epoch: Miocene
10 m.y. bin: Cenozoic 5
Key time interval: Early Miocene
Age range of interval: 23.04 - 15.98 m.y. ago
Stratigraphy
Geological group:White Limestone Formation:Montpelier
Stratigraphy comments: Overlying Formation: Pelleu Island Formation. Underlying Formation: Font Hill Formation. Thickness: 300m. (Mitchell 2004; Zans et al., 1963).
Lithology and environment
Primary lithology:planar lamination,white cherty/siliceous "limestone"
Secondary lithology:tabular,nodular chert
Lithology description: The Montpelier Formation consists of alternating successions characterized by micritic deepwater limestones and bioclastic-rich beds derived from shallow water. The deep-water sedimentary rocks consist of micrite-grade carbonates. They are dominated by coccolith debris and also contain abundant planktic foraminifera. These micritic limestones have common bands of chert. The cherts range from nodular to semi tabular to carious and are up to 20 cm thick. The cherts form well-defined bands parallel to bedding and can be used to establish a series of marker beds. These coccolith limestones also contain common marlstone bands up to 8 cm thick. (Mitchell 2004).
Environment:basinal (siliceous)
Geology comments: The formation as a whole is characterized by deep water limestones that had an influx of shallow water bioclastic-rich beds caused by submarine mass flow processes. (Mitchell 2004).
Taphonomy
Modes of preservation:mold/impression
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:228742
Authorizer:J. Wolfe Enterer:A. Lynch
Created:2023-01-01 12:11:14 Last modified:2025-02-22 15:12:02
Access level:the public Released:2023-01-01 12:11:14
Creative Commons license:CC0
Reference information

Primary reference:
83540. A. A. Klompmaker, R. W. Portell, A. T. Klier, V. Prueter, and A. L. Tucker. 2015. Spider crabs of the Western Atlantic with special reference to fossil and some modern Mithracidae. PeerJ 3:e1301 [J. Wolfe/A. Lynch]