Page:Transactions of the Geological Society, 1st series, vol. 1.djvu/31

 Rh have been washed away. This vein intersects the grauwacké, and is nearly perpendicular, running in an east and west direction, Parallel and near to it, is a similar vein, but not standing out from the cliff, and between these two granite veins is contained a vein of argillaceous stone about fifteen feet thick, the whole forming a singular kind of stratified vein lying in the grauwacké.

I have to regret that the flowing of the tide prevented me from making a more accurate examination of this interesting spot. This is particularly desirable as it is said that De Carteret about one hundred years ago wrought a copper mine here. The researches however of Mr. Le Pelley, the lord, have not confirmed this report, nor could I distinguish any metallic traces. Their existence however is not improbable, as it is well known that the rocks I have been describing are very productive of metals, and that copper ore among others is frequently found in similar situations.

From this place to l'Isle des Marchands, the coast appears to consist of the same materials. I had no time to examine it, and I believe it is every where inaccessible.

The small island itself is precisely of the same nature as the opposite coasts.

JERSEY.



The island of Jersey is in the form of a parallelogram, being about ten miles long and on an average about five broad. Its inclination is precisely the reverse of that of Guernsey, it being much elevated to the north and shelving away to the south. It is every where intersected by narrow vallies, of which the most common direction is across the island, or north and south. The soil is not unlike that