- Source: Castle Hayne Limestone
The Castle Hayne Limestone (also called the Castle Hayne Formation) is a middle Eocene-aged geologic formation in North Carolina, USA. It consists of cobble to pebble sized clasts, usually rounded, coated with phosphate and glauconite in a limestone matrix. The formation has been dated to the middle Eocene, but its exact age remains uncertain; however, it is generally thought to date to the Lutetian or early Bartonian.
Description
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.
Vertebrate paleobiota
Based on the Paleobiology Database:
= Cartilaginous fish
=Sharks
Rays
= Ray-finned fish
== Mammals
=Cetaceans
Sirenians
Invertebrate paleobiota
= Molluscs
== Cephalopods
=See also
List of fossiliferous stratigraphic units in North Carolina
References
Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
Kata Kunci Pencarian:
- Castle Hayne Limestone
- River Bend Formation
- Remingtonocetidae
- Belosaepiidae
- Peedee Formation
- Calappilia
- Glyptoactis
- 2016 in arthropod paleontology
- List of fossiliferous stratigraphic units in North Carolina
- 2021 in arthropod paleontology
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