Slate Slate Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression. The foliation in slate is called "slaty cleavage". It is caused by strong compression causing fine grained clay flakes to regrow in planes perpendicular to the compression. When expertly "cut" by striking parallel to the foliation, with a specialized tool in the quarry, many slates
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