GAB37, Blue Springs Locality (Cretaceous of the United States)

Where: Union County, Mississippi (34.4° N, 88.9° W: paleocoordinates 38.0° N, 66.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Coon Creek Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• Stratigraphically, this outcrop lies approximately 30.5-36.6 m (100-120 ft) above the top of the Demopolis Formation (as determined by a three-point problem on electric logs of nearby water wells). Fossils collected at the Blue Springs Locality include Exogyra costata Say, an index fossil to sediments of Early and Middle Maastrichtian Age.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, glauconitic, phosphatic, gray, sandy mudstone

• Sandy, glauconitic, and phosphatic light olive gray (5 Y 6/1) mudstone. The sequence of sediment includes an interval of phosphatic nodules (at 4 m in the measured section) which marks a break in sedimentation and an interval of erosion (leaving the phosphate pebble lag). Fossil decapods are preserved both as phosphatic nodules and as nonphosphatized remains.

Size class: macrofossils

Collected by G.A. Bishop

• Repository: GSC Museum, Georgia Southern College

Primary reference: G. A. Bishop. 1983. Fossil Decapod Crustacea from the Late Cretaceous Coon Creek Formation, Union County, Mississippi. Journal of Crustacean Biology 3(3):417-430 [C. Schweitzer/E. Johnson]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 139733: authorized by Carrie Schweitzer, entered by Evaline Johnson on 16.02.2013, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

 Decapoda - Nephropidae
Hoploparia tennesseensis Rathbun and Wade 1926 clawed lobster
 Decapoda - Palinuridae
Linuparus canadensis Whiteaves 1884 spiny lobster
 Decapoda - Diogenidae
"Paguristes whitteni n. sp." = Parapaguristes whitteni
"Paguristes whitteni n. sp." = Parapaguristes whitteni Bishop 1983 hermit crab
 Decapoda - Erymidae
"Eryma" flecta Rathbun 1926 decapod
 Decapoda - Callianassidae
Protocallianassa mortoni Pilsbry 1901 decapod
 Decapoda - Raninidae
Raninella tridens Roberts 1962 crab
Notopocorystes testacea Rathbun 1926 crab
 Decapoda - Retroplumidae
Cristipluma mississippiensis n. gen. n. sp. Bishop 1983 crab
 Decapoda - Dakoticancridae
Dakoticancer australis Rathbun 1935 crab