Geol., Paleontol.
a widely distributed fossil, of narrow range in time, regarded as characteristic of a given geological formation, used esp. in determining the age of related formations.
Also called guide fossil .
[ 1895-1900 ]
Geol., Paleontol.
a widely distributed fossil, of narrow range in time, regarded as characteristic of a given geological formation, used esp. in determining the age of related formations.
Also called guide fossil .
[ 1895-1900 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012