where does the term mother lode come from
Mother lode The term probably came from a literal translation of the Spanish veta madre, a term common in old Mexican mining. Veta madre, for instance, is the name given to an 11-kilometre-long (6.8Â mi) silver vein discovered in 1548 in Guanajuato, New Spain (modern-day Mexico).[1][need quotation to verify]