But Messrs.

Wall and Sawkins, in their geological survey of this island, have abstained from expressing any such opinion; and I think wisely.

They are more simply explained as the mere leavings of the old sea-worn mountain wall, at a time when the Orinoco, or the sea, lay along their southern, as it now does along their northern, side.

The terraces in which they rise mark successive periods of upheaval; and how long these periods were, no reasonable man dare guess.

But as for traces of ice-action, none, as far as I can ascertain, have yet been met with.