Also known as Barrier Bar, 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: New Orleans Barrier Trend 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 basal Barrier Bar unit (New Orleans trend). The Michoud Formation grades upward into a thin discontinous clayey sand containing abundant mollusk shells. This clayey sand unit forms the bottom of a locally, shelly, fine to coarse sand unit containing numerous burrow systems. Radiocarbon dates on peat collected from this unit yield dates of 11,090 and 29,860 years, although most authors consider the unit to have accumulated between 4-5,000 years ago. The unit is 1.5m thick. The collection comes from depth 4.5-6.0 m
• bed-level stratigraphic resolution
Environment/lithology: coastal; unlithified, fine-grained, coarse, shelly/skeletal sandstone
•JA: I am scoring this as unlithified because the sand is Holocene, isn't calcareous, overlies a soil, and includes a peat, plus the entire section is non-carbonate
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 41935: authorized by Austin Hendy, entered by Austin Hendy on 22.07.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Bivalvia | |
Nuculana acuta Conrad 1832 pointed nut clam
Nuculana concentrica Say 1824 Concentric Nut Clam | |
Crassinella lunulata Conrad 1834 clam | |
Ensis minor Dall 1899 clam | |
Cyrtopleura costata Linnaeus 1758 clam | |
Paramya subovata Conrad 1845 softshell clam | |
"Corbula swiftiana" = Caryocorbula caribaea, "Corbula contracta" = Caryocorbula contracta
"Corbula swiftiana" = Caryocorbula caribaea d'Orbigny 1845 clam
"Corbula contracta" = Caryocorbula contracta Say 1822 clam | |
Lepton lepidum Say 1826 clam | |
Aligena texasiana Harry 1969 aligena | |
Chama congregata Conrad 1833 jewel box
Arcinella cornuta Conrad 1866 jewel box | |
Rangia cuneata, Rangia flexuosa, "Spisula solidissima" = Hemimactra solidissima, Mulinia lateralis, "Mactra fragilis" = Mactrotoma fragilis
Rangia cuneata Sowerby 1831 clam
Rangia flexuosa Conrad 1839 clam
"Spisula solidissima" = Hemimactra solidissima Dilwyn 1817 clam Subspecies: Spisula solidissima similis
"Mactra fragilis" = Mactrotoma fragilis Gmelin 1792 surfclam | |
Raeta plicatella Lamarck 1818 clam | |
"Diplodonta semiaspera" = Diplodonta (Phlyctiderma) semiaspera
"Diplodonta semiaspera" = Diplodonta (Phlyctiderma) semiaspera Philippi 1836 clam | |
"Petricola pholadiformis" = Petricolaria pholadiformis, "Macrocallista nimbosa" = Macrocallista (Macrocallista) nimbosa, Gemma gemma, Mercenaria campechiensis, "Chione intapurpurea" = Puberella intapurpurea, Chione cancellata, "Anomalocardia auberiana" = Anomalocardia cuneimeris, Timoclea grus, Dosinia discus
"Petricola pholadiformis" = Petricolaria pholadiformis Lamarck 1818 venus clam
"Macrocallista nimbosa" = Macrocallista (Macrocallista) nimbosa Solander 1786 venus clam
Gemma gemma Totten 1834 venus clam
Mercenaria campechiensis Gmelin 1791 quahog
"Chione intapurpurea" = Puberella intapurpurea Conrad 1849 venus clam
Chione cancellata Linnaeus 1767 venus clam
"Anomalocardia auberiana" = Anomalocardia cuneimeris Conrad 1846 venus clam
Timoclea grus Holmes 1858 venus clam
Dosinia discus Reeve 1850 venus clam | |
Mytilopsis leucophaeata Conrad 1831 clam | |
Donax texasianus, "Donax variabilis" = Serrula variabilis
Donax texasianus Philippi 1847 clam | |
Macoma constricta, "Tellina texana" = Angulus texanus, Strigilla mirabilis, Tellidora cristata, "Tellina aequistriata" = Tellina (Merisca) aequistriata, "Tellina alternata" = Tellina (Eurytellina) alternata, "Tellina iris" = Scissula iris
Macoma constricta Bruguière 1792 tellin clam
"Tellina texana" = Angulus texanus Dall 1900 tellin clam
Strigilla mirabilis Philippi 1841 tellin clam
Tellidora cristata Récluz 1842 tellin clam
"Tellina aequistriata" = Tellina (Merisca) aequistriata Say 1824 tellin clam
"Tellina alternata" = Tellina (Eurytellina) alternata Say 1822 tellin clam
"Tellina iris" = Scissula iris Say 1822 tellin clam | |
Semele bellastriata Conrad 1837 clam
Semele proficua Pulteney 1799 clam
Abra aequalis Say 1822 abra
Ervilia cf. concentrica Holmes 1858 clam | |
Tagelus plebeius Lightfoot 1786 clam | |
"Trachycardium muricatum" = Trachycardium (Dallocardia) muricatum, Dinocardium robustum, "Laevicardium laevigatum" = Laevicardium serratum
"Trachycardium muricatum" = Trachycardium (Dallocardia) muricatum Linnaeus 1758 cockle
Dinocardium robustum Lightfoot 1786 cockle
"Laevicardium laevigatum" = Laevicardium serratum Linnaeus 1758 cockle | |
"Pandora trilineata" = Pandora (Pandora) trilineata
"Pandora trilineata" = Pandora (Pandora) trilineata Say 1822 clam | |
Periploma margaritaceum Lamarck 1801 clam | |
"Parvilucina multilineata" = Parvilucina multistriata Conrad 1841 clam | |
Brachidontes exustus Linnaeus 1758 mussel | |
"Anadara brasiliana" = Anadara (Cunearca) brasiliana, "Anadara ovalis" = Lunarca ovalis, "Anadara transversa" = Anadara (Larkinia) transversa
"Anadara brasiliana" = Anadara (Cunearca) brasiliana Lamarck 1819 ark
"Anadara ovalis" = Lunarca ovalis Bruguiere 1789 ark
"Anadara transversa" = Anadara (Larkinia) transversa Say 1822 ark | |
"Noetia ponderosa" = Eontia ponderosa
"Noetia ponderosa" = Eontia ponderosa Say 1822 clam | |
Argopecten gibbus Linnaeus 1758 calico scallop | |
Anomia simplex d'Orbigny 1845 jingle | |
Plicatula gibbosa Lamarck 1801 scallop | |
Atrina serrata Sowerby 1825 oyster | |
Crassostrea virginica Gmelin 1791 oyster | |
Scaphopoda | |
"Dentalium texasianum" = Paradentalium americanum, Dentalium sp.
"Dentalium texasianum" = Paradentalium americanum Chenu 1843 tusk shell
Dentalium sp. Linnaeus 1758 tusk shell | |
Gastropoda | |
Acteocina canaliculata Say 1826 barrel-bubble | |
Volvulella persimilis Mörch 1875 snail | |
Creseis acicula Renz 1829 snail | |
Neritina virginea, "Neritina reclivata" = Neritina usnea
Neritina virginea Linnaeus 1758 snail
"Neritina reclivata" = Neritina usnea Röding 1798 snail | |
Crepidula fornicata Linnaeus 1758 slipper shell
Crepidula plana Say 1822 slipper shell | |
Litiopa melanostoma Rang 1829 snail | |
"Diastoma varium" = Bittiolum varium
"Diastoma varium" = Bittiolum varium Pfeiffer 1840 cerith snail | |
Caecum imbricatum Carpenter 1858 snail
Caecum johnsoni Winkley 1908 snail | |
Teinostoma biscaynense McGinty 1945 snail | |
Cyclostremiscus pentagonus Gabb 1873 snail
Cyclostremiscus suppressus Dall 1889 snail | |
Tonna galea Linnaeus 1758 tun shell | |
Distorsio clathrata Lamarck 1816 snail | |
"Phalium granulatum" = Semicassis granulata
"Phalium granulatum" = Semicassis granulata Born 1778 snail | |
Ficus communis Röding 1798 fig shell | |
Strombus alatus Gmelin 1792 conch | |
"Marginella apicina" = Prunum apicinum
"Marginella apicina" = Prunum apicinum Menke 1828 margin shell | |
Scaphella junonia Lamark 1804 volute | |
"Thais haemastoma" = Stramonita haemostoma, "Thais haemastoma" = Stramonita haemostoma
"Thais haemastoma" = Stramonita haemostoma Linnaeus 1767 murex snail Subspecies: Thais haemastoma floridiana
"Thais haemastoma" = Stramonita haemostoma Linnaeus 1767 murex snail Subspecies: Thais haemastoma canaliculata
| |
Cancellaria reticulata Emmon 1858 snail | |
"Terebra concava" = Strioterebrum concava, "Terebra dislocata" = Strioterebrum dislocatum, Hastula salleana
"Terebra concava" = Strioterebrum concava Say 1827 auger snail
"Terebra dislocata" = Strioterebrum dislocatum Say 1822 auger snail
Hastula salleana Deshayes 1859 auger snail | |
Nannodiella oxia Bush 1885 snail | |
Kurtziella atrostyla Tryon 1884 snail | |
"Oliva mutica" = Olivella mutica, "Oliva sayana" = Oliva (Ispidula) sayana
"Oliva mutica" = Olivella mutica Say 1822 olive snail
"Oliva sayana" = Oliva (Ispidula) sayana Ravenel 1834 olive snail | |
"Cantharus cancellarius" = Solenosteira cancellaria, "Mitrella lunata" = Astyris lunata, "Anachis semiplicata" = Costoanachis semiplicata, "Anachis obesa" = Parvanachis obesa, "Fasciolaria lilium" = Cinctura lilium, Busycon perversum, "Busycon spiratum" = Busycotypus spiratus, Melongena corona, "Nassarius acutus" = Nassarius (Nassarius) acutus, Nassarius vibex, "Littorina irrorata" = Littoraria irrorata
"Cantharus cancellarius" = Solenosteira cancellaria Conrad 1846 true whelk
"Mitrella lunata" = Astyris lunata Say 1826 true whelk
"Anachis semiplicata" = Costoanachis semiplicata Stearns 1873 true whelk
"Anachis obesa" = Parvanachis obesa Adams 1845 true whelk
"Fasciolaria lilium" = Cinctura lilium Fischer 1807 true whelk Subspecies: Fasciolaria lilium hunteria
Melongena corona Gmelin 1791 true whelk
"Nassarius acutus" = Nassarius (Nassarius) acutus Say 1822 true whelk
Nassarius vibex Say 1822 true whelk
"Littorina irrorata" = Littoraria irrorata Say 1822 periwinkle | |
Eulima sp., Balcis cf. gracilis, "Balcis cf. arcuata" = Vitreolina arcuata, Triphora perversa, "Seila adamsi" = Seila adamsii, "Neverita duplicata" = Neverita duplicatus, Tectonatica pusilla, Sinum perspectivum
Eulima sp. Risso 1826 snail
Balcis cf. gracilis snail
"Balcis cf. arcuata" = Vitreolina arcuata Adams 1850 snail
"Seila adamsi" = Seila adamsii Lea 1845 snail
"Neverita duplicata" = Neverita duplicatus Say 1822 moon snail
Tectonatica pusilla Say 1822 moon snail
Sinum perspectivum Say 1831 moon snail | |
Epitonium cf. multistriatum Say 1826 wentletrap
Epitonium rupicola Kurtz 1860 wentletrap
Epitonium cf. tollini Bartsch 1938 wentletrap
Epitonium angulatum Say 1831 wentletrap | |
Diodora cayenensis Lamarck 1822 snail | |
"Solariorbis infracarinata" = Solariorbis infracarinatus
"Solariorbis infracarinata" = Solariorbis infracarinatus Gabb 1881 snail | |
"Acteon punctostriatus" = Japonactaeon punctostriata
"Acteon punctostriatus" = Japonactaeon punctostriata Adams 1840 snail | |
Peristichia agria, "Pyramidella crenulata" = Pyramidella suturalis, "Eulimastoma cf. teres" = Eulimastoma engonium, Eulimastoma cf. weberi, Turbonilla interrupta, "Odostomia impressa" = Boonea impressa, "Odostomia seminuda" = Boonea seminuda, Odostomia cf. livida
Peristichia agria snail
"Pyramidella crenulata" = Pyramidella suturalis Lea 1843 snail
"Eulimastoma cf. teres" = Eulimastoma engonium Bush 1885 snail
Eulimastoma cf. weberi Morrison 1965 snail
Turbonilla interrupta Totten 1835 snail
"Odostomia impressa" = Boonea impressa Say 1822 snail
"Odostomia seminuda" = Boonea seminuda Adams 1839 snail
Odostomia cf. livida snail | |
Melampus bidentatus Say 1822 snail | |
Odostomia gibbosa | |
"Odostomia cf. gibbosa" = Fargoa gibbosa
"Odostomia cf. gibbosa" = Fargoa gibbosa Bush 1909 |