Gravel made mostly of calcium carbonate, often in the form of limestone.
a shell that eats other shells
The chemical differences between Radiolarian and Foraminifera are in the types of shell casts they have developed. Radiolarians have siliceous shells, whereas Foraminifera have calcareous shells.
Calcareous ooze
A) Any aquatic invertebrate having a shell or shell-like carapace, esp such an animal used as human food. Examples are crustaceans such as crabs and lobsters and molluscs such as oysters. B) Any of numerous chiefly marine invertebrates of the phylum Mollusca, typically having a soft unsegmented body, a mantle, and a protective calcareous shell and including the edible shellfish and the snails.
Sedimentary
biogenous sediment
a planktonic marine protozoan with a calcareous shell.
Mollusks have a soft, unsegmented body and live in aquatic or damp habitats, and most kinds have an external calcareous shell.
calcareous alge adaptations
calcareous algae
Any of various echinoderms of the class Echinoidea, having a soft body enclosed in a round, symmetrical, calcareous shell covered with long spines
Calcareous ooze is an examploe of biogenous sediment.
an example of calcareous sponge is SPONGE BOB!
The mollusc (or mollusk) shell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Molluscae, like snails, clams, tusk shells, and several other classes.
The chemical differences between Radiolarian and Foraminifera are in the types of shell casts they have developed. Radiolarians have siliceous shells, whereas Foraminifera have calcareous shells.
As far as i know, calcareous means "containing or pertaining to calcium".
The foraminifers are unicellular organisms of the animal kingdom. Foraminifers are any of several large marine protozoans, of the subphylum Foraminifera, that have a calcareous shell with many holes through which pseudopodia protrude.
biogenous