foraminifer's Usage Examples:

The fossils from the Rhaetic beds belong to the Avicula contorta zone, those from the Lias to the Ammonites angulatus zone, while the blocks of limestone with chert contain Inoceramus, Cretaceous foraminifera and other organisms.

In the animal kingdom it occurs as both calcite and aragonite in the tests of the foraminifera, echinoderms, brachiopoda, and mollusca; also in the skeletons of sponges and corals.

Green mud differs to a greater extent from the blue mud, and owes its characteristic nature and colour to the presence of glauconite, which is formed inside the cases of foraminifera, the spines of echini and the spicules of sponges in a manner not yet understood.

The Oamaru limestones have been largely used for building stones; they are a pure white limestone, largely made up of foraminifera, bryozoa and shell fragments, and contain the teeth of sharks (e.

coast), and rocks of the same period occur in Nossi-be, at Mahajamba Bay, and at Diego-Suarez, with Nummulites and other foraminifers.

The newer rocks, common also to the Nicobars and Sumatra, are in Ritchie's Archipelago chiefly and contain radiolarians and foraminifera.

The proportion of calcium carbonate varies greatly according to the amount of foraminifera and other calcareous organisms which it contains.

Lime is, in fact, absorbed to an enormous extent by fishes, molluscs, crustacea, calcareous algae and sponges, starfishes, sea-urchins and feather stars, many polyzoa and a multitude of protozoa (mainly the foraminifera).

Molecular evidence for genetic mixing of Arctic and Antarctic subpolar populations of planktonic foraminifers.

Murray and Renard define globigerina ooze as containing at least 30% of calcium carbonate, in which the remains of pelagic (not benthonic) foraminifera predominate and in which remains of pelagic mollusca such as pteropods and heteropods, ostracodes and also coccoliths (minute calcareous algae) may also occur.

The benthic foraminiferal assemblage identified indicates a low oxygen environment with high organic detritus accumulation.