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
Blank Slate Books Blank Slate Books Blank Slate Books (BSB) is a publishing company based in the UK. It publishes primarily comic books, graphic novels and comic strip collections, with an emphasis on new work by British artists and translated work by European artists. The books it publishes are noted for their “indie-friendly” content, and are frequently by small press artists whose initial work is self-published. The name of the company is a pun on "drawing" or “writing” on a blackboard. BSB is currently one of the few dedicated original comics and graphic novel publishers in the UK. Blank Slate Books (BSB) was