Davies had rented land in the Rhondda Fawr and had searched for a workable seam for 15 months.
2.
Workable seams are close to the surface and coal from the deep Roger mine was considered to be of the highest quality.
3.
He was extensively involved in the planning of Broughton and invested heavily in the development of the town and mines, of which there were several workable seams.
4.
Oysters from the " Rutupian shore " the shoreline around colliery there; possible samples of coal were retrieved from the borehole at a depth of, but it was abandoned, no workable seam having been found.
5.
It comprises a fully exposed synclinorium with a varying thickness of Coal Measures ( Upper Carboniferous / Pennsylvanian ) deposits with thick, workable seams in the lower parts and generally thinner and sparser seams in the upper parts, together with a development of sandstones ( Pennant Sandstone ).
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