- Ordovician stage
- геол. ордовикский ярус
Англо-русский универсальный дополнительный практический переводческий словарь И. Мостицкого. И. Мостицкий. 2002-2012.
Ordovician stage
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Ordovician Period — Interval of geologic time, 490–443 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian. During the Ordovician, many of the landmasses were aligned in the tropics. Life was dominated… … Universalium
Ordovician — Period 488.3–443.7 million years ago … Wikipedia
Ordovician–Silurian extinction event — … Wikipedia
Tremadocian Stage — ▪ geology lowermost of the two standard worldwide divisions of the Lower Ordovician Series and lowest of the seven stages within the Ordovician System (Ordovician Period). It encompasses all rocks formed during the Tremadocian Age, which… … Universalium
Oxfordian (stage) — System Series Stage Age (Ma) Cretaceous Lower Berriasian younger Jurassic Upper Tith … Wikipedia
Gasconadian Stage — The Gasconadian Stage is the first stage of the Ordovician geologic period in North America and of the Lower Ordovician Canadian Epoch, coming immediately after the Late Cambrian Trempealeauan and preceding the middle Canadian Demingian. The… … Wikipedia
Chronostratigraphy — is the branch of stratigraphy that studies the age of rock strata in relation to time. The ultimate aim of chronostratigraphy is to arrange the sequence of deposition and the time of deposition of all rocks within a geological region, and… … Wikipedia
Hirnantian — The Hirnantian is the seventh and final internationally recognized stage of the Ordovician Period of the Paleozoic Era. It was of short duration, lasting about 1.9 million years, from 445.6 ± 1.5 to 443.7 ± 1.5 Ma (million years ago). The early… … Wikipedia
echinoderm — /i kuy neuh derrm , ek euh neuh /, n. any marine animal of the invertebrate phylum Echinodermata, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea … Universalium
Geology of the North Sea — Contents 1 Tectonic structure 2 Precambrian 3 Finnmarkian, Athollian, Caledonian Orogenies … Wikipedia
New Zealand geologic time scale — While also using the international Geologic time scale, many nations especially those with isolated and therefore non standard prehistories use their own system of dividing geologic time into epochs and faunal stages. In New Zealand, these epochs … Wikipedia
