If most of the grains are quartz and feldspar then the overall appearance of the rock will be light, while the opposite will be true if the minerals are mainly mica, pyroxene, amphibole or olivine. The colour of a rock with between 25 and 50% dark minerals is intermediate.
Full Definition of DISPLACE. transitive verb. 1. b: to remove from an office, status, or job c obsolete: to drive out: banish.2. b: to take the place of (as in a chemical reaction) : supplant. â disÂ·placeÂ·able \-ËplÄ-sÉ-bÉl\ adjective. See displace defined for English-language learners. See displace defined for kids.isplace implies an ousting or dislodging. supplant implies either a dispossessing or usurping of another's place, possessions, or privileges or an uprooting of something and its replacement with something else. supersede implies replacing a person or thing that has become superannuated, obsolete, or otherwise inferior.
dislocation. displacement of a bone from a joint; called also luxation. The most common ones involve a finger, thumb, shoulder, or hip; less common are those of the mandible, elbow, or knee. Symptoms include loss of motion, temporary paralysis of the joint, pain, swelling, and sometimes shock.. displacement of a bone from a joint. Signs include loss of motion, temporary paralysis of the involved joint, pain and swelling, and sometimes shock. Some dislocations, especially of the hip, are congenital, usually resulting from a faulty construction of the joint.