FGS Station 1/966 - Double Branch [Jackson Bluff] (Pliocene of the United States)

Where: Leon County, Florida (30.4° N, 84.6° W: paleocoordinates 30.5° N, 84.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Jackson Bluff Formation (Alum Bluff Group), Late/Upper Pliocene (3.6 - 2.6 Ma)

• Cancellaria Zone of Choctawhatchee Formation, Alum Bluff Group. The Cancellaria zone is in the highest fossiliferous beds along Harveys Creel. The total thickness of this zone is 25-30 ft. Late Miocene age based on recent lithostratigraphy. Local section name = Bloxham, Basinal/regional section name = Leon. Placed in Jackson Bluff Fm (and hence Late Pliocene) by enterer.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; unlithified, fine-grained, coarse, shelly/skeletal, argillaceous sandstone

• No reported geologic or paleoenvironmental data. Probably shallow water siliciclastic depositional environment.
• The sediments comprising the Cancellaria Zone consist of a fine to coarse grained clayey sand containing many fossils. Lithification data not reported, but all figured specimens appear to be free of matrix so an unlithified classification is assigned.

Size class: macrofossils

Reposited in the USNM

• Specimens are lodged in USNM collections. Collected by Mansfield (1925)

Primary reference: W. C. Mansfield. 1930. Miocene gastropods and scaphopods of the Choctawatchee Formation of Florida. Florida State Geological Survey Bulletin 3 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 59491: authorized by Austin Hendy, entered by Austin Hendy on 03.04.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Probably exhaustive for Mollusca. Certainly good nomenclatural treatment.
 Arcida - Arcidae
"Barbatia (Granoarca) propatula" = Barbatia (Barbatia) propatula, "Arca (Anadara) improcera" = Anadara, "Arca (Anadara) lienosa" = Anadara (Rasia) lienosa
"Barbatia (Granoarca) propatula" = Barbatia (Barbatia) propatula Conrad 1844 clam
Subspecies: B. (G.) propatila busana
"Arca (Anadara) improcera" = Anadara ark
"Arca (Anadara) lienosa" = Anadara (Rasia) lienosa Say 1832 ark
 Arcida - Glycymerididae
Glycymeris americana Defrance 1826 clam
 Pectinida - Pectinoidae
"Chlamys (Plagioctenium) eboreus" = Carolinapecten eboreus, "Chlamys (Plagioctenium) comparilis" = Aequipecten comparilis
"Chlamys (Plagioctenium) eboreus" = Carolinapecten eboreus Conrad 1833 scallop
Subspecies: C. (P.) eboreus darlingtonensis
"Chlamys (Plagioctenium) comparilis" = Aequipecten comparilis Tuomey and Holmes 1855 scallop
 Pectinida - Plicatulidae
"Plicatula marginata" = Plicatula gibbosa
"Plicatula marginata" = Plicatula gibbosa Lamarck 1801 scallop
 Mytilida - Mytilidae
 Carditida - Carditidae
"Cardita (Carditamera) arata" = Carditamera arata
"Cardita (Carditamera) arata" = Carditamera arata Conrad 1832 clam
Subspecies: C. (C.) arata harveyensis
 Cardiida - Chamidae
Chama congregata Conrad 1833 jewel box
 Cardiida - Veneridae
"Chione (Lirophora) ulocyma" = Lirophora (Panchione) ulocyma, Dosinia (Dosinidia) elegans, "Gafrarium (Gouldia) metastriatum" = Gouldia
"Chione (Lirophora) ulocyma" = Lirophora (Panchione) ulocyma Dall 1895 venus clam
Subspecies: C. (L.) ulocyma propeulocyma
Dosinia (Dosinidia) elegans Conrad 1838 venus clam
"Gafrarium (Gouldia) metastriatum" = Gouldia venus clam
 Cardiida - Tellinidae
"Macoma (Psammacoma) hosfordensis" = Psammacoma
"Macoma (Psammacoma) hosfordensis" = Psammacoma tellin clam
 Cardiida - Cardiidae
"Cardium (Trachycardium) oedalium" = Trachycardium
"Cardium (Trachycardium) oedalium" = Trachycardium cockle
Subspecies: C. (T.) oedalium harveyensis
 Lucinida - Lucinidae
"Phacoides (Parvilucina) multilineatus" = Parvilucina multistriata, Phacoides (Bellucina) tuomeyi
"Phacoides (Parvilucina) multilineatus" = Parvilucina multistriata Conrad 1841 clam
 Nuculida - Nuculidae
"Nucula proxima" = Nucula (Nucula) proxima
"Nucula proxima" = Nucula (Nucula) proxima Say 1820 Atlantic Nut Clam
 Protobranchia - Nuculanidae
"Leda trochilia" = Nuculana
"Leda trochilia" = Nuculana pointed nut clam
Subspecies: L. trochilia coensis and L. trochilia hamlinensis
 Triphoroidea - Cerithiopsidae
Cerithiopsis "sp. C" Hanley 1849 snail
 Neogastropoda - Olividae
"Oliva sayana" = Oliva (Ispidula) sayana
"Oliva sayana" = Oliva (Ispidula) sayana Ravenel 1834 olive snail
 Neogastropoda - Nassariidae
"Alectrion consensa" = Nassarius (Alectrion)
"Alectrion consensa" = Nassarius (Alectrion) snail
Subspecies: A. consensa harveyensis
 Vermetoidea - Vermetidae
Petaloconchus sculpturatus Lea 1846 worm shell
 Sorbeoconcha - Turritellidae
Vermicularia spirata Philippi 1836 turret shell
"Turritella duplinensis" = Turritella (Torculoidella) duplinensis Gardner and Aldrich 1919 turret shell
 Sorbeoconcha - Scaliolidae
"Alabina adamsi" = Finella adamsi
"Alabina adamsi" = Finella adamsi Dall 1889 snail
Subspecies: Alabina adamsi floridana
 Trochoidea - Trochidae
"Tegula (Omphalius) exoleta" = Chlorostoma (Omphalius)
"Tegula (Omphalius) exoleta" = Chlorostoma (Omphalius) top snail