Non-Skeletal Grain types

Extraclasts/Lithoclasts

1. Lithoclasts

Ooidal packstone with micritized ooids resedimented in basinal setting including angular carbonate lithoclast of peloidal grainstone to packstone likely deriving from older shallow-water carbonate facies.

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2. Lithoclasts

Skeletal grainstone with crinoids and fragments of bryozoans with a lithoclast of undetermined composition containing red argillaceous matrix.

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3. Lithoclasts

Grainstone with oncoids (with at nuclei micritized ooids) and peloids cemented by blocky sparite during burial including a carbonate lithoclast of ooidal grainstone with isopachous rims of fibrous cement.

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4. Extraclasts

Skeletal packstone containing common quartz grains associated with barnacle and bryozoan fragments, coralline algae oncoids (rhodoids) and a rounded extraclast.

Thin section kindly provided by T. Geel, Vrije Universiteit, Amsterdam

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5. Extraclasts

Packstone to wackestone with planktonic foraminifers and Inoceramus fragments indicative of Late Cretaceous age with a wackestone clast containing calpionellids indicative of an older age (latest Jurassic-earliest Cretaceous).

Thin section kindly provided by T. Geel, Vrije Universiteit, Amsterdam

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6. Extraclasts

Lower Jurassic grainstone-rudstone rich in extraclasts of eroded Carboniferous Limestone. This is a transgressive rocky shoreline deposit. Field of view approximately 13 mm.

Lower Jurassic, Sutton Stone, Ogmore by Sea, South Wales, UK

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Resedimented ooid

Angular lithoclast

Crinoid ossicle

Extraclast

Fenestellid bryozoan

Lithoclast of ooidal grainstone

Barnacle

Bryozoan

Extraclast

Extraclast

Extraclasts/Lithoclasts

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Resedimented ooid

Angular lithoclast

Crinoid ossicle

Extraclast

Fenestellid bryozoan

Lithoclast of ooidal grainstone

Barnacle

Bryozoan

Extraclast

Extraclast