rock train . A term suggested by Kendall and Wroot (1924, p.448) for the rock material in "process of transport at the sides and in the middle of a glacier" and "subject to the dynamic forces of the glacier".

transposition . In structural petrology, disruption of preexisting fabric so that all fabric elements are rotated to a new orientation. Results in a transposition or transposed foliation.

pleural furrow . (a) A groove along the surface of a pleura of a trilobite. (b) A groove crossing the pleura of a merostome.

vanuralite (van-ur-al'-ite). A citron-yellow monoclinic mineral: Al(UO₂)₂(V₂O₈)(OH)•11H₂O .

imbibition [rock] (im-bi-bi'-tion). Formation of feldspathic minerals by the penetration of alkaline solutions of magmatic origin into aluminum-rich metamorphic rocks. Obsolete.