Metamorphic rock Metamorphic rock Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock (protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure ( or more), causing profound physical or chemical change. The protolith may be a sedimentary, igneous, or existing metamorphic rock. Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by texture and by chemical and mineral assemblage (metamorphic facies). They may be formed simply by being deep beneath
Proxmap sort It is a form of bucket and radix sort. Once a ProxmapSort is complete, ProxmapSearch can be used to find keys in the sorted array in formula_1 time if the keys were well distributed during the sort. Both algorithms were invented in the late 1980s by Prof. Thomas A. Standish at the University of California, Irvine. In general: Given an array A with "n" keys: Simplied version: Given an array A with "n" keys Note: "keys" may also contain other data, for instance an array of Student objects that contain the key plus a student ID and name. This makes