Phrase guide
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noun
The geological signature of the transition between the Cretaceous period and the Tertiary period 65.5 million years ago.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
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.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
No etymology was provided for this word.
