noun
or substitution deposit
: a metalliferous vein formed by the partial or complete substitution of the vein material for the original rock or mineral — called also replacement vein
noun
or substitution deposit
: a metalliferous vein formed by the partial or complete substitution of the vein material for the original rock or mineral — called also replacement vein
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012