Also known as Upper Bay-Sound Clay, Lake Carmel Pit
Where: Orleans County, Louisiana (30.1° N, 90.0° W: paleocoordinates 30.1° N, 90.0° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Upper Member (Michoud Formation), Holocene (0.0 - 0.0 Ma)
• Five late Quaternary stratigraphic units are exposed at the Lake Carmel borrow pit. These in ascending order are : 1) deltaic equivalents of Deweyville terrace alluvium (Wisconsin); 2) a buried soil zone, "Little Woods paleosol" (late Wisconsin-early (Pleistocene); 3) bay-sound clay, "Michoud Formation" (middle Holocene); 4) barrier bar sand of the New Orleans trend (middle Holocene); 5) St Bernard prodeltaic and delta front deposits (late Holocene). This collection is from the Bay-Sound Clay (Michould Formation), a slightly shell, greenish gray, soft silty clay to clayey silt immediately above the Pleistocene unconformity. The botttom of the clay is dated at 7,290 and 7,200 years. The unit is 4 m thick. The collection comes from depth 6.3-7.5 m
• bed-level stratigraphic resolution
Environment/lithology: paralic; poorly lithified, shelly/skeletal, gray, green, silty claystone and poorly lithified, shelly/skeletal, gray, green, argillaceous siltstone
Size class: macrofossils
Collection methods: bulk,
• All taxa collected and identified G. Mollyn. Unknown repository, though possibly Tulane University
Primary reference: W. Miller, III. 1983. Stratigraphy of newly exposed Quaternary seduments, eastern Orleans Parish, Louisiana. Tulane Studies in Geology and Paleontology 17(4):85-104 [A. Miller/A. Hendy/A. Hendy]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 41940: authorized by Austin Hendy, entered by Austin Hendy on 22.07.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Nuculana concentrica Say 1824 Concentric Nut Clam | |
Ensis minor Dall 1899 clam | |
Cyrtopleura costata Linnaeus 1758 clam
Barnea truncata Say 1822 clam | |
Paramya subovata Conrad 1845 softshell clam | |
Mulinia lateralis Say 1822 clam | |
Raeta plicatella Lamarck 1818 clam | |
Diplodonta cf. soror Adams 1852 clam | |
"Petricola pholadiformis" = Petricolaria pholadiformis, Cyclinella tenuis, "Agriopoma texasiana" = Callocardia (Agriopoma) texasiana, Dosinia discus
"Petricola pholadiformis" = Petricolaria pholadiformis Lamarck 1818 venus clam
Cyclinella tenuis Récluz 1852 venus clam
"Agriopoma texasiana" = Callocardia (Agriopoma) texasiana Dall 1892 venus clam
Dosinia discus Reeve 1850 venus clam | |
Macoma tenta, Macoma constricta, "Tellina texana" = Angulus texanus, "Tellina alternata" = Tellina (Eurytellina) alternata
Macoma tenta Say 1834 tellin clam
Macoma constricta Bruguière 1792 tellin clam
"Tellina texana" = Angulus texanus Dall 1900 tellin clam
"Tellina alternata" = Tellina (Eurytellina) alternata Say 1822 tellin clam | |
Abra aequalis Say 1822 abra | |
"Anadara ovalis" = Lunarca ovalis
"Anadara ovalis" = Lunarca ovalis Bruguiere 1789 ark | |
Gastropoda | |
Hastula salleana Deshayes 1859 auger snail | |
"Nassarius acutus" = Nassarius (Nassarius) acutus, Nassarius vibex
"Nassarius acutus" = Nassarius (Nassarius) acutus Say 1822 true whelk
Nassarius vibex Say 1822 true whelk | |
Neverita duplicatus Say 1822 moon snail | |
Turbonilla interrupta Totten 1835 snail |