NH1-D, Martin-Marietta Quarry (Eocene of the United States)

Where: New Hanover County, North Carolina (34.4° N, 77.9° W: paleocoordinates 34.2° N, 68.7° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Periarchus lyelli zone, Castle Hayne Formation, Bartonian (41.3 - 38.0 Ma)

• According to Powell and Baum, this collection may also fall under the Crassatella alta/Chlamys cawcawensis faunal zone, due to uncertainty of where the C. alta zone begins due to unconformity.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; lithified, shelly/skeletal grainstone

• The Castle Hayne Limestone was deposited in an open, normal salinity environment between 30 m and 100 m in water depth. Comfort Member contains cross-bedded intervals, suggesting some energy, consistent with deep subtidal environment.
• a bryozoan biosparrudite (baum et al. 1978)

Size class: macrofossils

Primary reference: R. J. Powell and G. R. Baum. 1982. Eocene biostratigraphy of South Carolina and its relationship to Gulf Coastal Plain zonations and global changes of coastal onlap. Geological Society of America Bulletin 93:1099-1108 [A. Miller/K. Layou]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 5367: authorized by Arnold Miller, entered by Karen Layou on 27.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida - Megathyrididae
Argyrotheca sp. Dall 1900
 Terebratulida - Cancellothyrididae
Terebratulina spp. d'Orbigny 1847
 Rhynchonellida - Basiliolidae
Probolarina salpinx, "Probolarina holmesii" = Probolarina holmesi
"Probolarina holmesii" = Probolarina holmesi Dall 1903
Bivalvia
 Arcida - Arcidae
Barbatia cf. cuculloides Conrad 1833 clam
Barbatia cf. B. cuculloides
 Pectinida - Pectinoidae
Spondylus lamellacea Kellum 1926 scallop
Chlamys spp. Röding 1798 scallop
Chlamys cookei Kellum 1926 scallop
 Pectinida - Plicatulidae
Plicatula filamentosa Conrad 1833 scallop
 Carditida - Crassatellidae
Crassatella cf. texalta Harris 1895 clam
Crassatella cf. C. texalta
 Cardiida - Chamidae
Chama sp. Linnaeus 1758 jewel box
Chama sp. a
 Cardiida - Cardiidae
Cardiidae indet. Lamarck 1809 cockle
Gastropoda
 Neogastropoda - Fasciolariidae
 Cypraeoidea - Cypraeidae
Cypraea sp. Linnaeus 1758 cowry
 Xenophoroidea - Xenophoridae
Xenophora sp. Fischer von Waldheim 1807 carrier shell
 Sorbeoconcha - Turritellidae
Turritella spp. Lamarck 1799 turret shell
Cephalopoda
 Nautilida - Nautilidae
Eutrephoceras carolinensis Kellum 1926 nautiloid
  -
Belosaepia sp. Voltz 1830
Asteroidea
 Valvatida - Goniasteridae
Recurvaster sp. BrĂ¼nnich-Nielsen 1943 sea star
Echinoidea
 Cidaroida - Cidaridae
Cidaris pratti Clark and Twitchell 1915 pencil urchin
 Arbacioida - Arbaciidae
Coelopleurus infulatus Morton 1833 sea urchin
 Spatangoida - Schizasteridae
Agassizia wilmingtonica Cooke 1942 heart urchin
Linthia wilmingtonensis Clark and Twitchell 1915 heart urchin
Linthia harmatuki Kier 1980 heart urchin
Linthia hanoverensis Kellum 1926 heart urchin
 Spatangoida - Spatangidae
Maretia subrostrata heart urchin
 Echinolampadoida - Echinolampadidae
Echinolampas appendiculata Emmons 1858 sea urchin
 Cassiduloida - Neolampadidae
Eurhodia rugosa Ravenel 1848 sea urchin
 Clypeasteroida - Protoscutellidae
Periarchus lyelli Conrad 1834 sand dollar
Protoscutella plana Conrad 1865 sand dollar
Crinoidea
 Bourgueticrinida - Bathycrinidae
Democrinus sp. Perrier 1883 Sea lily
Anthozoa
 Scleractinia - Flabellidae
Flabellum sp. Lesson 1831 stony coral