He made several observations, including i) the occurrence of surface "
boulder clay" across the plains, apparently in "streams" rather than sheets; ii) two
boulder clays on the plains (already reported by Dawson and McConnell (O-1885), separated by "interglacial" sediments; iii) potential sources of clay (as sources of clays, lake basins occupied notable space in his writing, later to be incorporated into a retreat history of the Laurentide ice-margin); and iv) significant localized areas of black paludal sediments, allied to what was generally referred to as the "black loam", or predominant surface soil.
Beneath this layer a level of
boulder clays is noticeable (Soltysik and Rybka, 1993).
"The work has revealed two circular areas, each about six metres in diameter and about 40 metres apart where there was obviously no underlying
boulder clay."
An official report revealed yesterday that the 91ft vessel's nets had caught on a huge pile of
boulder clay left over from burying a North Sea oil and gas line.
A ramp, made out of the same
boulder clay and gravel as the cliffs, has been built to replace steps which crumbled away.