| 词条 | Castle Hayne Limestone | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 释义 |
| name = Castle Hayne Limestone | image = | caption = | type = Formation | age = Eocene | period = Eocene | prilithology = limestone | otherlithology = marl | namedfor = Castle Hayne, North Carolina | namedby = | region = {{Flag|North Carolina}} | country = {{Flag|United States}} | coordinates = | unitof = | subunits = New Hanover Member, Comfort Member, Spring Garden Member | underlies = | overlies = | thickness = | extent = | area = | map = | map_caption = }} 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. DescriptionThe Castle Hayne Formation is divided into three submembers: the New Hanover member, the Comfort Member, and the Spring Garden Member [1]. 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. FossilsInvertebratesMolluscs[2]
Cephalopods
Vertebrates FossilsMammalsCetaceans
Sirenians
Cingulates
Reptiles[3]Squamates
Turtles
Crocodilians
See also{{Portal|Earth sciences|North Carolina|Paleontology|Paleogene|Cenozoic}}
References1. ^{{cite journal |last1=Ward |first1=Lauck W. |last2=Lawrence |first2=David R. |last3=Blackwelder |first3=Blake W. |title=Stratigraphic revision of the middle Eocene, Oligocene, and lower Miocene; Atlantic Coastal Plain of North Carolina |journal=U.S. Geological Survey Bulletion |date=1979 |volume=1457-F|pages=3-10 |url=https://pubs.usgs.gov/bul/1457f/report.pdf |accessdate=26 June 2018}} 2. ^{{Cite web|url=http://collections.naturalsciences.org/resultsInvertPaleo.aspx|title=Online Collections {{!}} North Carolina Museum of Natural Sciences|website=collections.naturalsciences.org|access-date=2016-03-15}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }} 3. ^{{Cite web|url=http://collections.naturalsciences.org/resultsVertPaleo.aspx|title=Online Collections {{!}} North Carolina Museum of Natural Sciences|website=collections.naturalsciences.org|access-date=2016-03-19}}{{dead link|date=July 2017 |bot=InternetArchiveBot |fix-attempted=yes }} 4. ^{{Cite news|url=http://www.ncfossilclub.org/sites/default/files/Janus2015-4(rev1).pdf|title=Fossil ID Quiz|last=|first=|date=|work=|publisher=North Carolina Fossil Club|newspaper=JANUS|pages=Name is on Page 5 , Location is listed next to fossil #11 on Page 7|access-date=|via=}}
2 : Limestone formations of the United States|Paleogene geology of North Carolina |
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