The Coralline Crag Formation is a geological formation in England. It is a series of marine deposits found near the North Sea coast of

Suffolk Suffolk () is a ceremonial county of England in East Anglia. It borders Norfolk to the north, Cambridgeshire to the west and Essex to the south; the North Sea lies to the east. The county town is Ipswich; other important towns include Lowes ...

and characterised by bryozoan and

mollusc Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is esti ...

debris. The deposit, whose onshore occurrence is mainly restricted to the area around Aldeburgh and Orford,Suffolk
Natural England. Retrieved 8 August 2016. is a series of

bioclast Bioclasts are skeletal fossil fragments of once living marine or land organisms that are found in sedimentary rocks laid down in a marine environment—especially limestone varieties around the globe. some of which take on distinct textures and col ...

ic calcarenites and silty sands with shell debris, deposited during a short-lived warm period at the start of the Pliocene Epoch of the

Neogene The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago ( Mya) to the beginning of the present Quaternary Period Mya. ...

Period. Small areas of the rock formation are found in locations such as Boyton and Tattingstone to the south of Orford as well as offshore at Sizewell.Richmond Farm SSSI
GeoSuffolk. Retrieved 8 August 2016. Crag is a local word for a shelly sand. Coralline Crag has sometimes been used historically in the Suffolk coast area for building and a number of quarries exist. The tower of St Peter's Church in Chillesford is one of only two built using the rock.

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Bryozoan fossils in the Coralline Crag rocks of Suffolk
Neogene England Geography of Suffolk Escarpments of England {{England-stub

See also

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