folium

• Существительное, обозначающее тонкий слой или пласт, особенно метаморфической породы.

A noun referring to a thin layer or stratum, especially of metamorphic rock.

irregular plural

1. Thin rock layerC2formalscientific

   A thin, sheet-like layer or stratum of rock, especially in metamorphic formations.

   Тонкий слой породы

   • The geologist identified a distinct folium of mica schist in the outcrop.
   • These folia are evidence of intense pressure during mountain formation.
   • The sample showed alternating folia of quartz and feldspar.

   Synonymsbandlaminalayersheetstratum