Glacial drumlins of boulder clay lie in the vales of the Dee, Cree and Urr.
The finest material deposited is rock meal, ground by the great glacial mill, and called "boulder clay."
Intercalation of freshwater beds and of boulder clay and sand at Mundesley.
At this place a human fibula was found under a layer of boulder clay.
They are seen in some places to rest on the boulder clay of the glacial period, which will be described in future chapters.
In Denmark, also, recent shells have been found in stratified beds, closely associated with the boulder clay.
We may then suppose that boulder clay may be formed in three ways.
The freshwater gravel which incloses it is decidedly of much more modern origin than the drift or boulder clay of the same region.
A good deal of the solid geology is obscured in many places by glacial drift, boulder clay and sands.
The boulder clay of Germany is supposed to have accumulated underneath this vast "mer de glace," as he calls it.