Barrows were introduced during the Beaker phase. They are a burial cist or grave covered with a mound of earth. They come in two styles; long barrows or round barrows. Long Barrows - Rectangular mounds of earth and/or stones used for inhumations and cremation burials. Round Barrows - A circular mound, which covers an inhumation or cremation burial. Also known as Tumuli. These come in several sub-types: Bell Barrows - Circular mounds which have a flat platform, before the encircling ditch. They usually contain male burials. Disc - A flat circular area, surrounded by both a ditch and a bank. A small tump of earth in the centre marks the position of the grave itself. They usually contain female burials. Bowl Barrows - Circular mounds which are sometimes accompanied by a surrounding ditch.