Word Study
terrigenous
CIDE DICTIONARY
terrigenous, a. [L. terrigena, terrigenus; terra the earth + genere, gignere, to bring forth.].
Earthborn; produced by the earth. [1913 Webster]
OXFORD DICTIONARY
terrigenous, adj. produced by the earth or the land (terrigenous deposits).
Etymology
L terrigenus earth-born
For further exploring for "terrigenous" in Webster Dictionary Online