- Tommotian stage
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томмотский ярус
English-Russian dictionary of geology. 2011.
Tommotian stage
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Tommotian age — The Tommotian Age, named after the mollusc Tommotia , which began approx. 530 million years ago is an early part of the Cambrian period and lasted for only about 3 million years.PaleogeographyWorld climate during the Tommotian was mild; there was … Wikipedia
Cambrian Period — Oldest time division of the Paleozoic Era. During the Cambrian, 543–490 million years ago, there were widespread seas and several scattered landmasses. The largest continent was Gondwana. The average climate was probably warmer than today, with… … Universalium
Cambrian — For other uses, see Cambrian (disambiguation). Cambrian Period 542–488.3 million years ago … Wikipedia
Demosponge — Barrel sponge (Xestospongia testudinaria) Scientific classification … Wikipedia
Small shelly fauna — The small shelly fauna or small shelly fossils, abbreviated to SSF, are mineralized fossils, many only a few millimetres long, with a nearly continuous record from the latest stages of the Ediacaran to the end of the Early Cambrian period. They… … Wikipedia
Early Cambrian — The Early Cambrian (also known as the Caerfai, Waucoban, or Georgian) is the first of three geological epochs of the Cambrian period. It spans the time between 542 ± 0.3 Ma and 513 ± 2 Ma (million years ago). The Cambrian explosion of complex… … Wikipedia
Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… … Wikipedia
Archaeocyatha — Taxobox name = Archaeocyatha fossil range = Early Late Cambrian domain = Eukaryota unranked regnum = Opisthokonta regnum = Animalia subregnum = Parazoa phylum = Porifera? (sponges) unranked classis = Archaeocyatha 1 – Gap ( intervallum ) *2 –… … Wikipedia
Cambrian explosion — The Cambrian explosion or Cambrian radiation was the seemingly rapid appearance of most major groups of complex animals around Ma|530, as evidenced by the fossil record. [http://www.ucmp.berkeley.edu/cambrian/camb.html The Cambrian Period] ]… … Wikipedia
Small-Shelly-Fauna — Bei der Small Shelly Fauna (SSF) – oft fälschlich auch als „Tommotium Fauna“ bezeichnet – handelt es sich um mineralisierte Fossilien, oftmals nur einige Millimeter groß, die von den letzten Stufen des Ediacarium bis hin zum Ende der frühen… … Deutsch Wikipedia
