MUDSTONE Antonyms

• a soft whitish calcite

• a pure flat white with little reflectance

• an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant

• a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces

• write, draw, or trace with chalk

• a composite rock made up of particles of varying size

• a group of diverse companies under common ownership and run as a single organization

• composed of heterogeneous elements gathered into a mass

• increase in amount by collecting or gathering

• a kind of sedimentary rock resembling marble or limestone but rich in magnesium carbonate

• a light colored mineral consisting of calcium magnesium carbonate; a source of magnesium; used as a ceramic and as fertilizer

• plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz

• something having the quality of granite (unyielding firmness)

• a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals

• hard metamorphic rock consisting essentially of interlocking quartz crystals

• a sedimentary rock consisting of sand consolidated with some cement (clay or quartz etc.)

• a sedimentary rock formed by the deposition of successive layers of clay

• a fine-grained sandstone of consolidated silt