Globigerina organisms

   Globigerina is a genus of foraminifera, of vast abundance at the surface of the ocean. So abundant are these minute organisms that, as they die, their empty shells form a continuous rain falling from the surface to the bottom, where they accumulate to form the deposit known as globigerina ooze. The dead shells are minute structures, composed of about seven chambers arranged in a spiral. In life the surface is prolonged into slender spines, and the shell is sur­rounded by a mass of bubbly protoplasm, which streams out along the spines. Globigerina ooze occurs over a vast stretch of ocean bed, both north and south of the equator.