Polymorphinida

Polymorphinida is an order of foraminifers. There are 2410 species of Polymorphinida, in 143 genera and 7 families. It includes groups like Pleurostomellidae, Ellipsoidinidae, and Ellipsolagenidae. Dead Polymorphinida form calcareous oozes.

URI: http://purl.obolibrary.org/obo/ENVO_02000046
Definition: Calcareous ooze is a marine sediment composed primarily of the shells--also known as tests--of foraminifera, coccolithophores, and pteropods. This is the most common pelagic sediment by area, covering 48% of the world ocean's floor. This type of ooze is limited to depths above the Carbonate Compensation Depth at time of burial. It accumulates more rapidly than any other pelagic sediment type, with a rate that varies from 0.3 - 5 cm / 1000 yr.

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