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, sandy claystone

Size class: macrofossils

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 44408: authorized by Linda Ivany, entered by Patrick Wall on 09.09.2004

Creative Commons license: CC BY (attribution)