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Definition of Maastrichtian in English:

Maastrichtian

Pronunciation /mɑːˈstrɪktɪən/

adjective

(also Maestrichtian)
Geology

  • Of, relating to, or designating a division of the Upper Cretaceous in Europe that is now regarded as the most recent stage of the Cretaceous, lying next below the Danian of the Tertiary.

noun

(also Maestrichtian)
Geology

  • The Maastrichtian stage or age. Usually with the.

Origin

Late 19th century; earliest use found in Archibald Geikie (1835–1924), geologist and historian. From French maestrichtien from Maestricht (now Maastricht, whence the 20th-cent. respelling) + -ien.