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.
A distaff and a spindle. As a noun a distaff (/ËdÉªstÉËf/, also called a rock) is a tool used in spinning. It is designed to hold the unspun fibers, keeping them untangled and thus easing the spinning process. It is most commonly used to hold flax, and sometimes wool, but can be used for any type of fiber.