Sentences with phrase «collodarian radiolarian»

They compared isotope measurements on the silica skeletons of diatoms, which store environmental signals from the ocean's surface, with isotope signals from radiolarians, which live in deeper water layers.

Objects with icosahedral symmetry occur in nature only at microscopic scales, including quasicrystals, many viruses and some beautiful protozoa in the radiolarian family

At left, a large Thalassicolanucleata radiolarian with a central capsule enclosing the nucleus.

At right, a colonial collodarian radiolarian comprised of many individual cells, each with a central capsule, sharing a common jelly.

Roger lovingly describes radiolarians, some of which build skeletons of strontium sulfate while others manage to eat multicelled animals.

The researchers were after genetic material from two related groups of marine organisms, the foraminifera and the radiolarians.

As the seafloor moves slowly east, it slides under the North American continent and leaves behind scrapings of radiolarian chert and pillow basalt.

The sea cliffs and road cuts of the Headlands have exposed some of the finest examples of pillow basalt and radiolarian chert.

At any rate, when «normal» rain containing natural carbonic acid falls upon silicon - containing sedimentary rocks formed over eons from the shells of tiny marine creatures — radiolarians, diatoms and some sponges — this «siliceous» rock combines with the carbonic acid to form ions of bicarbonate.

The Changhsingian (latest Permian) Dalong Formation is composed of grayish - black cherty beds and cherty mudstone with deep - water assemblages including the bivalve Hunanopecten sp., ammonoid Pseudotirolites sp. and radiolarian Flustrella sp. 56.