Joseph Beete Jukes

“ They are seldom found embedded in any great mass of drift matter, but lie for the most part loosely scattered over the surface of the country.
There is another set of drifted materials which I should be inclined to separate from the Great Northern drift, because large granite blocks are rarely, if ever, found in it, while it often abounds in F chalk flints, and sometimes in broken fossils of the Lias and Oolitic formations, and seems, therefore, rather to be derived from the east than the north. ”

“ Blocks of granite and old trappean rocks, evidently belonging to the Great Northern drift, are found in great abundance all along the western boundary of the coal-field, especially about Bushbury, and thence towards Cannock. 'They occur abundantly also over all the New red sandstone country on the west of the coal-field. They may be found occasionally, but by no means abundantly, within the limits of the coal-field itself, but on its eastern side they are, as far as my recollection serves me, comparatively very rare. ”

“ It makes no feature at the surface of the ground, but comes in suddenly 50, 60, or 100 feet deep, filling up a pre-existing valley in the Coal-measures, and causing great trouble to those who have to sink through it to the beds below. ”