The magma in a magma chamber usually exists in several layers, based upon the density of the materials composing the lava. The least-dense magma rises to the top, while the denser magma settles toward the bottom of the magma chamber.
Full Definition of ACCRETION. 1. : the process of growth or enlargement by a gradual buildup: as a: increase by external addition or accumulation (as by adhesion of external parts or particles) b: the increase of land by the action of natural forces. 2. â acÂ·creÂ·tionÂ·ary \-shÉ-Ëner-Ä, -Ëne-rÄ\ adjective.
Accurizing is the process of improving the accuracy of a firearm or airgun. For firearms, accuracy is defined as the ability to hit exactly what one is aiming at. Further, accuracy and precision, or the ability to hit the same place over and over again in a repeatable fashion, are the goals of accurizing.