protomylonite

protomylonite

[‚prōd·ō′mī·lə‚nīt]
(petrology)
A mylonitic rock that develops from contact-metamorphosed rock; granulation and flowage are caused by overthrusts following the contact surfaces between the intrusion and the country rock.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
At the Canaveilles site (Figure 3), two hot springs with temperatures of 43.3[degrees]C and 60.1[degrees]C emerge in thinly foliated gneiss (protomylonite), near the unfaulted contact between the gneiss and the metasediments.