perigenic

perigenic

[¦per·ə¦jen·ik]
(geology)
Referring to a rock constituent or mineral formed at the same time as the rock it is part of, but not formed at the specific location it now occupies in the rock.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
(1990): Glauconite formation: discussion of the terms authigenic, perigenic, allogenic, and meta-allogenic.