As these lakes shrank after the return of an arid climate, they left elevated beaches and deposits of various minerals, which mark their former extent.
The western and northern coasts are regular in outline with long straight beaches; and shallows are common in the seas that wash them.
There is evidence that Ungava, like the rest of Labrador, has risen several hundred feet since the Ice Age, marine beaches being found up to 700 ft.
Then the troops along the front were quietly withdrawn in successive groups, the fine weather continuing to the end and work at the beaches proceeding without a hitch.
Finally the parties still in the trenches slipped away, and when dawn broke the Turks, who had first ascertained that something unusual was afoot from the explosion of a vast mine in the Anzac area, and from conflagrations on the beaches where the few stores to be abandoned were being destroyed, discovered that the invaders were gone.