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Castle Hayne Limestone facts for kids

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Castle Hayne Limestone
Stratigraphic range: Eocene
Type Formation
Sub-units New Hanover Member, Comfort Member, Spring Garden Member
Primary limestone
Other marl
Region  North Carolina
Country  United States
Type section
Named for Castle Hayne, North Carolina

The Castle Hayne Limestone (also called the Castle Hayne Formation) is a geologic formation in North Carolina. It consists of cobble to pebble sized clasts, usually rounded, coated with phosphate and glauconite in a limestone matrix. The Castle Hayne Limestone is known for containing fossils dating back to the Paleogene period. It preserves many of North Carolina's renowned Eocene fossils. It is named after the locality of Castle Hayne in New Hanover county, though the formation itself stretches over several counties.


The Castle Hayne Formation is divided into three submembers: the New Hanover member, the Comfort Member, and the Spring Garden Member. The New Hanover member is the oldest member and is characterizes by cobbles and pebbles, fine sand, glauconite, and phosphate in a fine limestone matrix. The most common fossils are shark and ray teeth. Index fossils place this member in the middle Eocene. The Comfort member lies above the New Hanover member. It contains bryozoa and sea urchin fossils and beds of glauconite and phosphate pebbles that mark breaks in deposition. The Comfort member was deposited in the late middle Eocene and is overlain by the Spring Garden member. The Spring Garden member is a siliceous rock cemented with calcite and containing detrital phosphate. Mollusc bivalves account for up to 75% of the composition in some areas and molds of molluscs shells filled with silica are common. Index fossils indicate this member was also deposited in the late middle Eocene.




Genera Species Notes Images
Chione C. sp
A guide to the fossil invertebrate animals in the Department of geology and palaeontology in the British museum (Natural history) (1907) (14592753318)
Crassatella C. wilcoxi

C. sp

A crassatellid bivalve.
Ensis E. sp
Ensis ensis-H
Flemingostrea F. sp
Giganostrea G. trigonalis An extinct group of oyster.
Glyptoactis G. sp
Panopea P. sp A close relative of the modern geoduck.
Hiatellidae - Panopea glycymeris
Pecten P. membranosus An extinct bivalve that belonged to the same genus as most modern scallops.
Fossil scallop - fosil deniztarağı
Pholadomya P. sp
Pholadomyidae - Pholadomya scutata
Plicatula P. filamentosa
Venericardia V. sp


Genera Species Notes Images
Anomalosaepia A. vernei

A. mariettani

A. alleni

A. andreane

A. sp

An extinct group of cuttlefish that was also found in Egypt and belonged to the family Anomalosaepiidae.
Aturia A. alabamensis Belongs in its own family: the Aturiidae.
Aturia eocene puglia
Beloptera B. sp Another extinct group of cuttlefish that was found in several localities in Europe.
Conchorhynchus C. furrus Has not been classified into any specific cephalopod group yet.
Eutrephoceras E. carolinensis First originated during the Cretaceous period.
Eutrephoceras dorbignyanum (Forbes in Darwin, 1846) - Strasbourg specimen
E. dorbignyanum, a related species.
Rhyncolites R. sp

R. minimus

R. aturensis

An extinct group of nautiloid that has not yet been classified into any specific family.

Vertebrates Fossils


Genus Species Notes Images
Zygorhiza Z. kochii A close relative of the well-known archaeocete Dorudon.
Basilotritus B. wardi A basilosaurid that was originally classified under Eocetus.
Genus Species Notes Images
Protosiren P. sp A prehistoric manatee relative that is also known from Eurasia.
Genus Species Notes Images
Holmesina H. sp A pampathere that resembled a giant armadillo. It arrived to North America after migrating from South America.
Holmesina 3 Clean


Genus Species Notes Images
Palaeophis P. grandis An extinct species of giant marine snake from the family Paleophiidae.
Palaeophiidae - Palaeophis maghrebianus
Genus Species Notes Images
Cheloniidae indet Known by plate, shell, and plastron fragments.
Genus Species Notes Images
Crocodylia indet Known by vertebra.
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