The International Commission on Stratigraphy (ICS) for the first time in 120 years has added to the geologic time scale of the Earth new geological period — the Ediacaran.
According to the decision ICS, Ediacaran period will be part of the Neoproterozoic era, and cover a time span the history of our planet from 600 to 542 million years ago.
The name comes from the new period Ediacaria hills in southern Australia, rocks which will be the stratotype for this geological period of time.
Edikarsky period begins at the end of the last ice age, the so-called "Frozen Earth" (Lapland Late Proterozoic age in Russian terminology), when about 600-700 million years ago the planet has gone through a series of global glaciations.
After that, the seas began to actively develop soft-bodied forms of life — jellyfish, sea worms and the ancestors of modern echinoderms, which were the precursors of life forms that have an external skeleton is a shell.
In geology and paleontology of the former Soviet Union, as more fully detail the ancient history of the Earth, a new period coincides with overseas Vendian of the late Proterozoic and early Cambrian. This segment of the geological history had been highlighted by the Soviet scientists in 1952, when geologist Boris Sokolov has appropriated the term for a specific system of Vendian sedimentary rocks found them on the territory of the former Soviet Union.
Russian scientists — members of the ICS and Mezhdunarodgo Geological Union — insisted that a new geological period called the Vendian, and expressed deep disappointment when the majority preferred the term Ediacaran.
Battery News, 18.05.2004 14:53
See also: Ice in Antarctica, Unusual archaeological finds.