0 a type of heavy, sticky soil full of large rocks that is formed in and between large areas of ice --
It consists of ancient semi-natural woodland on a boulder clay soil.
The earliest masonry building was the church, which was constructed on shallow foundations of sandstone rubble and pebbles on boulder clay.
Beneath the pasture the archaeology is on boulder clay overlying magnesian limestone.
Much boulder clay is of a bluish-grey until exposed to weather which causes a transformation to a brown colour.
Till, also known as boulder clay, is a mix of unconsolidated sediment with a range of grain sizes (clay-boulder).
The clay-rich hilltop soils are primarily a consequence of blanketing of the area with boulder clay or glacial till during the recent glaciations.
The local drift geology is mostly glacial boulder clay, as well as glacial sands and gravel.
The valley bottoms have a thin deposit of boulder clay.
