(9/8.

Pernety "Voyage aux Isles Malouines" page 526.) The quartz rock must have been quite pasty when it underwent such remarkable flexures without being shattered into fragments.

As the quartz insensibly passes into the sandstone, it seems probable that the former owes its origin to the sandstone having been heated to such a degree that it became viscid, and upon cooling crystallised.

While in the soft state it must have been pushed up through the overlying beds.
In many parts of the island the bottoms of the valleys are covered in an extraordinary manner by myriads of great loose angular fragments of the quartz rock, forming "streams of stones." These have been mentioned with surprise by every voyager since the time of Pernety.

The blocks are not waterworn, their angles being only a little blunted; they vary in size from one or two feet in diameter to ten, or even more than twenty times as much.