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
What Is History? form of elitism—the product of elite social groups whose security and whose privileges have been most conspicuously eroded by the crisis, and of elite countries whose once undisputed domination over the rest of the world has been shattered". Carr's opinions about the nature of historical work in "What Is History?" were controversial. In his 1967 book "The Practice of History", Sir Geoffrey Elton criticized Carr for his "whimsical" distinction between the "historical facts" and the "facts of the past", saying that it reflected "an extraordinarily arrogant attitude both to the past and to the place of the historian studying it".