Lake Carmel Pit (Base of Barrier Bar) - Miller III (1983): Holocene, Louisiana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Tagelus divisus Spengler 1794
u category
Gastropoda - Neotaenioglossa - Calyptraeidae
Crepidula fornicata (Linnaeus 1758)
mc category
Gastropoda - Epitoniidae
Epitonium angulatum (Say 1831)
r category
Gastropoda - Eulimidae
Balcis cf. jamaicensis (Adams 1845)
r category
recombined as Melanella jamaicensis
Gastropoda - Naticidae
Neverita duplicatus (Say 1822)
u category
Gastropoda - Neogastropoda - Olividae
Oliva sayana Ravenel 1834
r category
recombined as Oliva (Ispidula) sayana
Gastropoda - Neogastropoda - Nassariidae
Nassarius vibex (Say 1822)
a category
Nassarius acutus (Say 1822)
mc category
recombined as Nassarius (Nassarius) acutus
Gastropoda - Neogastropoda - Buccinidae
Cantharus cancellarius (Conrad 1846)
mc category
recombined as Solenosteira cancellaria
Gastropoda - Neogastropoda - Marginellidae
Marginella apicina Menke 1828
r category
recombined as Prunum apicinum
Gastropoda - Opisthobranchia - Cylichnidae
Acteocina canaliculata (Say 1826)
r category
Bivalvia - Arcida - Arcidae
Anadara ovalis (Bruguiere 1789)
u category
recombined as Lunarca ovalis
Bivalvia - Ostreida - Ostreidae
Crassostrea virginica (Gmelin 1791)
u category
Bivalvia - Cardiida - Cardiidae
Dinocardium robustum (Lightfoot 1786)
u category
Bivalvia - Cardiida - Donacidae
Donax texasianus Philippi 1847
u category
Bivalvia - Cardiida - Tellinidae
Tellina alternata Say 1822
c category
recombined as Tellina (Eurytellina) alternata
Tellina texana Dall 1900
u category
recombined as Angulus texanus
Tellidora cristata (Récluz 1842)
u category
Macoma tenta (Say 1834)
mc category
Bivalvia - Cardiida - Semelidae
Abra aequalis (Say 1822)
mc category
Bivalvia - Cardiida - Mactridae
Mulinia lateralis (Say 1822)
c category
Bivalvia - Cardiida - Anatinellidae
Raeta plicata (Lamarck 1818)
u category
recombined as Raeta plicatella
Bivalvia - Cardiida - Veneridae
Dosinia discus (Reeve 1850)
c category
Mercenaria campechiensis (Gmelin 1791)
a category
Agriopoma texasiana (Dall 1892)
r category
recombined as Callocardia (Agriopoma) texasiana
Bivalvia - Cardiida - Ungulinidae
Diplodonta cf. soror (Adams 1852)
mc category
Bivalvia - Pholadida - Pholadidae
Diplothyra smithii Tryon 1862
u category
Barnea truncata (Say 1822)
r category
Cyrtopleura costata (Linnaeus 1758)
u category
Bivalvia - Thraciida - Periplomatidae
Periploma margaritaceum (Lamarck 1801)
r category
Bivalvia - Nuculanida - Nuculanidae
Nuculana concentrica (Say 1824)
r category
see common names

Geography
Country:United States State/province:Louisiana County:Orleans
Coordinates: 30.1° North, 90.0° West (view map)
Paleocoordinates:30.1° North, 90.0° West
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period:Quaternary Epoch:Holocene
10 m.y. bin:Cenozoic 6
Key time interval:Holocene
Age range of interval:0.01170 - 0.00000 m.y. ago
Stratigraphy
Formation:New Orleans Barrier Trend Member:Basal
Local section:Lake Carmel Pit Local bed:6.0-6.3 m
Regional section:Orleans
Stratigraphic resolution:bed
Stratigraphy comments: 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 6.0-6.3 m
Lithology and environment
Primary lithology:fine,coarse,shelly/skeletal sandstone
Includes fossils?Y
Lithology description: Locally, shelly, fine to coarse sand
Environment:coastal indet.
Glacial or sequence phase:transgressive
Geology comments: Part of a sub-surface sand body that has been variously labeled "New Orleans barrier island".
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:bulk,field collection
Reason for describing collection:paleoecologic analysis
Collection method comments: All taxa collected and identified G. Mollyn. Unknown repository, though possibly Tulane University
Taxonomic list comments:Exhaustive for mollusca. Key to abundance data: a=abundant; c=common; mc=moderately common; u=uncommon; r=rare.
Metadata
Also known as:Base of Barrier Bar, Lake Carmel Pit
Database number:41936
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-07-22 09:08:32 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-07-22 09:08:32
Creative Commons license:CC BY
Reference information

Primary reference:
11203. 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]