Including the closely related terms sea level, and level.
… Biodiversity Action Plan August 2004 arable land, with fragments of unimproved grassland, heathland and woodland. 88. The undulating topography rarely exceeds 50m above sea level. Glacial deposits obscure the underlying geology, which includes the Selby coalfield. Mineral extraction in the District has mainly focused on coal, limestone and clay. 89. Magnesian Limestone (which extends…