Where: Jackson County, Louisiana (32.3° N, 92.7° W: paleocoordinates 33.4° N, 83.8° W)
• coordinate based on nearby landmark
When: Cook Mountain Formation (Claiborne Group), Bartonian (41.3 - 38.0 Ma)
• "Three samples from the site were strontium dated forty-five million years old"
•Ivany - Cook Mt is Bartonian
• bed-level stratigraphic resolution
Environment/lithology: marginal marine; unlithified, gray, red, sandy claystone
Size classes: macrofossils, mesofossils
Collection methods: bulk, sieve,
• "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."
Primary reference: 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]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 44410: authorized by Linda Ivany, entered by Patrick Wall on 09.09.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
•...
•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."
unclassified | |
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Anthozoa | |
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Endopachys lonsdalei Vaughan 1900 stony coral
Balanophyllia sp. Wood 1844 stony coral | |
Thecostraca | |
Euscalpellum eocenense Meyer 1885 barnacle | |
Gymnolaemata | |
Lunulites sp. Lamarck 1816 | |
"Holoporella granulosa" = Celleporaria
"Holoporella granulosa" = Celleporaria | |
Gastropoda | |
Architectonica sp. Röding 1798 sundial | |
Solariella tricostata Conrad 1833 snail | |
Retusa (Cylichnina) galba Conrad 1833 snail | |
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"Athleta petrosus" = Athleta petrosa
"Athleta petrosus" = Athleta petrosa Conrad 1833 volute | |
Marginella (Dentimargo) constrictoides margin shell | |
Latirus moorei Gabb 1860 snail | |
"Coronia margaritosa" = Gemmula (Coronia)
"Coronia margaritosa" = Gemmula (Coronia) turrid | |
Bivalvia | |
Nucula (Nucula) mauricensis Harris 1919 nut clam | |
Eburneopecten sp. Conrad 1865 scallop | |
Cubitostrea sellaeformis Conrad 1832 oyster | |
Glycymeris trigonella Conrad 1833 clam | |
| |
Crassatella texalta Harris 1895 clam | |
Venericardia (Rotundicardia) rotunda Lea 1833 clam
Venericardia (Venericor) sp. Stewart 1930 clam | |
Scaphopoda | |
Dentalium minutistriatum Gabb 1850 tusk shell | |
Polyplacophora | |
Chiton sp. Linnaeus 1758 chiton |