A deposit that is similar to chalk is diatomaceous chert.
Algae, diatoms , dinoflagellates, and photosynthetic bacteria all belong to this group of organisms.
From single-celled algae called diatoms to the story of a man who plants acorns, IDFuel reminds us that inspiration for design is all around us.
Massive, bioturbated terrigenous silty clay and diatomaceous mud dominate sedimentation in the distal ice-shelf environment.
Although diatoms are universal in fresh and sea water, they achieve greater importance in high-latitude oceanic areas, as well as in some continental margin basins where they form diatomaceous ooze.
For example, replacement of diatoms with chlorophytes will alter cycling of silica because diatoms require silica and chlorophytes do not.
‘The bottom appeared light and clear, a waste of firm diatomaceous [algae-skeleton] ooze,’ said Piccard.
Many are planktonic like the diatoms and Sargassum, floating free near the water surface, and being carried along by the surface currents.
The slime molds are now known to be a mixture of three or four unrelated groups, and the oomycetes are now classified in the Chromista, with the diatoms and brown algae.
Ballistic delivery after impact of diatomaceous clasts obviates the need for glacial transport from hypothesized Pliocene diatomaceous marine rocks in the Wilkes and Pensacola subglacial basins.