OIL SHALE
Meaning of OIL SHALE in English
Geol.
a black or dark-brown shale or siltstone rich in bitumens, from which shale oil is obtained by destructive distillation.
[ 1870-75 ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012