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Meaning of K-T boundary | Babel Free

Noun CEFR B2

Definitions

The geological signature of the transition between the Cretaceous period and the Tertiary period 65.5 million years ago.
The geological signature of the transition between the Cretaceous period and the Tertiary period 65.5 million years ago. This transition is marked worldwide by a layer of material that contains a high level of iridium.
This transition is marked worldwide by a layer of material that contains a high level of iridium.

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

K-T extinction event K-theory K-tool K-Town K-turn k-value