- any marine foraminifer of the genus Globigerina, having a calcareous shell, occurring either near the surface of the sea or in the mud at the bottom.
Origin of globigerina
Examples from the Web for globigerina
Historical Examples of globigerina
The shells accumulate at the bottom of moderately deep seas to form “Globigerina ooze” and are preserved thus in the chalk.
Globigerina, glob-i-je-rī′na, n. a genus typical of Globigerinid, a pelagic family of foraminifers.
It is called Globigerina, and some specimens of chalk consist of little else than Globigerin and granules.
It is probably a developmental phase of Globigerina, a, Orbulina shell; b, Globigerina shell.
Chalk is well known to consist largely of foraminiferal shells, mostly vitreous, like the north Atlantic globigerina ooze.
- any marine protozoan of the genus Globigerina, having a rounded shell with spiny processes: phylum Foraminifera (foraminifers)
- globigerina ooze a deposit on the ocean floor consisting of the shells of these protozoans