Anisian
Definition
A geological stage or substage located at the base of the Middle Triassic epoch, chronologically spanning from approximately 247 to 242 million years ago. As an adjective, the term refers to rocks, sediments, or fossils formed during this time interval, internationally defined by the appearance of specific ammonite and conodont assemblages within reference Alpine geological sections.
Bilingual Equivalents
- Anisian
- Anisian stage
Grammatical & Source Details
| Inflection Type | Variable adjective with standard masculine, feminine, and plural inflectional variations, or singular neuter noun. |
| Formation | International neologistic loan derived from the Latin name of the Anisus River (Enns, Austria), where the type strata were first described. |
| Spelling / Pronunciation | [a.ni.si.ˈan] |
| Source | Lexicon of Historical Geology, Stratigraphic Nomenclature, and Invertebrate Paleontology |
Contextual Usage Examples
RO: Geologii au descoperit un strat bogat în amoniți caracteristici pentru etajul anisian din Carpații Orientali.
EN: The geologists discovered a stratum rich in ammonites characteristic of the Anisian stage in the Eastern Carpathians.
RO: Această formațiune calcaroasă aparține intervalului anisian și marchează o schimbare majoră a nivelului mării.
EN: This limestone formation belongs to the Anisian interval and marks a major shift in sea level.
RO: Analiza microscopică a confirmat prezența unor faune microbiene din perioada în care s-a depus acest anisian.
EN: Microscopic analysis confirmed the presence of microbial faunas from the period when this Anisian was deposited.
Idioms & Phrases
Etaj anisian / Anisian stage
RO: Subdiviziune a timpului geologic mezozoic care marchează debutul sedimentării din Triasicul Mediu.
EN: A subdivision of Mesozoic geological time marking the onset of sedimentation in the Middle Triassic.
Calcar anisian / Anisian limestone
RO: Rocă sedimentară carbonatică formată prin acumularea de schelete marine în timpul acestei epoci geologice.
EN: A carbonaceous sedimentary rock formed by the accumulation of marine skeletons during this geological epoch.
Faună anisiană / Anisian fauna
RO: Ansamblul de organisme fosile marine, în special amoniți, care au trăit exclusiv în acest interval stratigrafic.
EN: The assemblage of marine fossil organisms, especially ammonites, that lived exclusively during this stratigraphic interval.
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