On Glacial Deposits North of Bridlington

Abstract

In my paper published in the “Society’s Proceedings” for 1879, I mentioned that the Gravels immediately overlying the Purple Boulder Clay, North of Bridlington, have in some places masses of Boulder Clay included in their lower parts. The diagram, Fig. 1, shews this: it represents the top of the cliff from the wall and stile at the south edge of Sewerby Park, as far north as the point where the footpath leaves the cliff. The letters P.B.C. stand for Purple Boulder Clay, and R.B.C. for Red Boulder Clay. I take from my note book the following: “Opposite Sewerby the gravel is interbedded with, and jammed against boulder clay in several places. East of the first turnip field, as you go eastwards, the gravel dies out, and the boulder clay is covered by a silty clay; but the gravel soon reappears under the silty clay, and continues (though thin) resting on boulder clay, against which it seems to be jammed near the east end of the grass field. Beyond this all is obscure. Boulder clay seems to be at the surface; then we have a hollow, like the site of a pool or stream course, occupied by gravel, probably recent. Beyond this we have well-bedded gravel at the top of the cliff over boulder clay.” This last mentioned gravel is the thick bed of gravel of drift pebbles, which forms the top of the cliff at the Danes’ Dike valley. Another note says that “ In the first turnip field east ...