01 n. a thin layer of geologic deposits, of varying thickness in different parts of the world, found between the geological strata identified as …
-
1.
a thin layer of geologic deposits, of varying thickness in different parts of the world, found between the geological strata identified as Cretaceous and the strata above, identified as Tertiary; also, the time point or period marking the boundary between the Cretaceous and Tertiary periods.
Syn.
K/T boundary.