資料來源 : pyDict

重粘土

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Gault \Gault\, n. [Cf. Norw. gald hard ground, Icel. gald hard
   snow.] (Geol.)
   A series of beds of clay and marl in the South of England,
   between the upper and lower greensand of the Cretaceous
   period.