division of Pleistocene time and deposits in northern Europe (the Pleistocene Epoch began about 2,500,000 years ago and ended about 10,000 years ago). The Menapian Glacial Stage followed the Waal Interglacial Stage and preceded the Cromerian Interglacial Stage, both periods of relatively moderate climatic conditions. Menapian sediments contain the remains of fossil animals and plants (preserved as spores and pollen) adapted to cold climes. The Menapian is correlated with the Baventian Stage of Great Britain, a unit represented by deposits formed in a marine environment.