Harvey Site - A: Bartonian, Louisiana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Ficidae
Ficopsis sp. Conrad 1866
2 individuals
Gastropoda - Neogastropoda - Volutidae
Bullata semen Lea 1833
7 individuals
Gastropoda - Neogastropoda - Fasciolariidae
3 individuals
Bivalvia - Pholadida - Corbulidae
4 individuals
Bivalvia - Cardiida - Veneridae
1 individual
Callista (Callista) perovata lisbone
Bivalvia - Carditida - Carditidae
5 individuals
Bivalvia - Carditida - Crassatellidae
4 individuals
Bivalvia - Ostreida - Ostreidae
2 individuals
Bivalvia - Nuculida - Nuculidae
9 individuals
Gymnolaemata - Cheilostomata - Lunulitidae
Lunulites sp. Lamarck 1816
10 individuals
see common names

Geography
Country:United States State/province:Louisiana County:Jackson
Coordinates: 32.3° North, 92.7° West (view map)
Paleocoordinates:36.8° North, 75.4° West (Wright 2013)
Basis of coordinate:based on nearby landmark
Time
Period: Paleogene Epoch: Eocene
Stage: Bartonian 10 m.y. bin: Cenozoic 3
Key time interval: Bartonian
Age range of interval: 41.03 - 37.71 m.y. ago
Stratigraphy
Geological group:Claiborne Formation:Cook Mountain
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: "Three samples from the site were strontium dated forty-five million years old"
Ivany - Cook Mountain is Bartonian. Bed/Horizon A.
Lithology and environment
Primary lithology:gray,red or brown unlithified sandy claystone
Includes fossils?Y
Lithology description: 3'10'' Gray and Brownish Red Variegated Sandy Clay
Environment:marginal marine indet. Tectonic setting:passive margin
Glacial or sequence phase:transgressive
Geology comments: "The Clairborn Group is composed of a transgressive sequence including the Cane River, Sparta, Cook Mountain, and Cockfield (Rainwater, 1982). Cockfield fluvial deposits are also present in this area. The Cook Mountain Formation was deposited during the latter part of the Clairborne stage of the Tejas sequence. It shows a transgression with the influence from the Mississippi and possibly a Ouachita source (McCarley, 1981). The Laramide and Mexican Cordilleran orogens contributed large amounts of sediment to the Gulf throughout the Eocene (Frazier and Schwimmer, 1987)."
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils,microfossils
Spatial orientation:life position
Preservation of anatomical detail:excellent
Articulated whole bodies:some
Disassociated major elements:some
Temporal resolution:time-averaged
Spatial resolution:autochthonous
Collection methods and comments
Collection methods:bulk,sieve,field collection
Rock censused:14 kg
Reason for describing collection:paleoecologic analysis
Collection method comments: "Horizontal bulk samples were collected, disaggregated, sieved, and counted. Forty pounds of substrate were removed from a four inch horizontal layer near each lithological boundary ...These bulk samples were dried and a thirty pound sub-sample was boiled in Quaternary O solution until they disaggregated. The disaggregated sub-samples were sieved through USGS #10 and #14 sieves."
Taxonomic list comments:"To obtain a minimum number of species, bivalve valves were counted and divided by two. A valve was counted if more than one-half of the shell remained or if a majority of the cardinal processes and one-third of the shell remained. Whole gastropods and recognizable spires were counted. For caphopods the toal length of the species pieces was divided by the average length of the species. Remains of bryozoan colonies were counted as an individual. Solitary corals were counted as one organism if more than one-half of the theca remained.
...
A type collection was established from surface samples and identifed using Dockery (1980) and MacNeil and Dockery (1984). This collection was confirmed by David T. Dockery of the Mississippi Office of Geology."
Metadata
Database number:44405
Authorizer:L. Ivany Enterer:P. Wall
Modifier:U. Smith Research group:GCP,marine invertebrate
Created:2004-09-09 11:09:07 Last modified:2025-02-22 15:12:02
Access level:the public Released:2004-09-09 11:09:07
Creative Commons license:CC0
Reference information

Primary reference:
11665. G. Zumwalt, J. Pratt, and J. Moncrief. 1995. Marine Macro-Invertebrate Paleoenvirionmental Interpretation of the Harvey Site (Cook Mountain, Eocene) in North-Central Louisiana. Mississippi Geology 16(1):12-21 [L. Ivany/P. Wall/P. Wall]