Lake Harrison

Lake Harrison is the name given to a lake that in parts of the Ice Age covered much of the Midlands in England around Warwick and Birmingham and Leicester. It was formed when ice sheets over Wales and Northern England blocked drainage north-eastwards, trapping a lake between this and the Cotswolds. Finally the lake made two overflow courses, until drainage by the Cole and Soar could resume due to glacial retreat:

• Southeast. Across the Fenny Compton Gap into the Cherwell which drains into the Thames. This has become a wind gap.
• Southwest. This course became lasting for the south-west zone of where the lake was, as the River Avon, Warwickshire which flows into the Severn. See stream capture.