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Astian

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adjective / neologism (geology / paleontology)

Definition

Pertaining to or relating to the Astian, a historical chronostratigraphic subdivision of the Upper Pliocene in Europe (primarily used in the Mediterranean basin to describe marine sedimentary deposits rich in fossilized malacofauna); the term is derived from the name of the city of Asti in Italy.

Bilingual Equivalents

  • Astian
  • Astian stage

Grammatical & Source Details

Inflection Type Variable adjective or proper neuter noun, changing regularly from singular to structural plural forms.
Formation Geological neologism derived from the Italian place-name 'Asti' paired with the standard European stratigraphical suffix '-ian'.
Spelling / Pronunciation [as.ti.ˈan]
Source International Stratigraphic Guide & Geological Lexicons

Contextual Usage Examples

RO: Geologul a identificat o structură astiană bogată în resturi de bivalve în timpul săpăturilor din valea râului.

EN: The geologist identified an Astian structure rich in bivalve remains during excavations in the river valley.

RO: În manualele vechi de stratigrafie, straturile de nisipuri galbene erau încadrate obligatoriu în orizontul astian.

EN: In old stratigraphy textbooks, the yellow sand layers were mandatorily classified within the Astian horizon.

RO: Analiza microscopică a microfosilelor a confirmat vârsta astiană a formațiunii sedimentare studiate.

EN: Microscopic analysis of the microfossils confirmed the Astian age of the studied sedimentary formation.

Idioms & Phrases

Orizont astian / Astian horizon

RO: Strat geologic sedimentar specific caracterizat printr-o asociație unică de faună fosilă marină.

EN: A specific sedimentary geological layer characterized by a unique association of marine fossil fauna.

Faună astiană / Astian fauna

RO: Totalitatea organismelor nevertebrate ale căror cochilii s-au conservat în straturile Pliocenului de tip Asti.

EN: The totality of invertebrate organisms whose shells were preserved in the Pliocene layers of the Asti type.

Depozit de tip astian / Astian-type deposit

RO: Acumulare terigenă sau marină grosieră formată în fazele finale ale regresiunii bazinului pliocenic.

EN: A coarse terigenous or marine accumulation formed during the final phases of the Pliocene basin regression.

Keywords

#astian #astian stage #geology #stratigraphy #pliocen #sedimentary layers #earth science #word formation
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