Page:Transactions of the Geological Society, 1st series, vol. 1.djvu/153

 Rh that at no time of the year did they find the water in Loe Pool become salt. I tasted it repeatedly and found it quite fresh.

The coast beyond Portlever rises abruptly, at the distance of a mile and a half from the sea, and at the height of three hundred and sixty feet, we leave the grauwacke and enter the granite, before we reach the road leading from Helston to Marazion.

It will be recollected that the mountain chain of Cornwall dips to the west, that the land is contracted very much on that side by Mount's Bay, thus cutting off a great portion of the grauwacke formation, for although the road from Helston to Marazion runs nearly the whole way along the shore, it lies directly on the line of transition. The grauwacke rises to the height of three hundred and sixty feet on the side of Tregonning-hill, from thence the granite continues as far as the sixth mile stone from Helston to Marazion. There, the land gradually lowering to the sea, we enter again on the grauwacke, near the village of Kennegy but at what height I did not ascertain.

Antiquarians, after very laborious researches, have conceived, that they have found sufficient proofs in the testimony of ancient historians,