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
A Sort of Homecoming (song) A Sort of Homecoming (song) "A Sort of Homecoming" is the first song of U2's 1984 album, "The Unforgettable Fire". A live version of the track is found on 1985's four-track EP, "Wide Awake in America". It is also the only song with lyrics inside the sleeve for the album. As the opening track on "The Unforgettable Fire", "A Sort of Homecoming" epitomises the new direction U2 had taken. A far more atmospheric album than the previous overt-rock of "War", the album has a rich and orchestrated sound. Like much of the album, the song replaces the hard-hitting martial drum