Distinctive features:  
Pale grey highly fossiliferous rock. Effervesces in dilute hydrochloric acid.

Colour: 
Greywish-white to buff or yellowish-grey.

Texture and granularity: 
Shelly.

Composition: 
Mostly entire and brokwn fossilised shells cemented by calcium carbonate.

Field associations: 
Represents a thick accumulation of marine shells and other calcite-rich organisms deposited in shallow water.

 

Worldwide.

 

Source of fossils.