TrekGEO > Geology of Japan > Sedimentary facies > Reef crest

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Reef crest

Depth of water

High tide - Upper shoreface (0 - 5 m)


The highest part of the reef core in the organic reef complex. Subjected to the influences of waves.

Sedimentary facies (Sediments)

Framework of reef-forming organisms, Grainstone, Packstone

Sedimentary facies (Structures)

Sigmoidal stratification

Sedimentary facies (Fossils, Coral reef)

Corals, Calcareous algae, Forams, Bryozoans, Shellfishes

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