Algonkian

The vast length of Algonkian time is shown by the thickness of its marine deposits and by the cycles of erosion which it includes.

The languages of the Algonkian family are as diverse as the Indo-European tongues.

Two important ones, however—namely, Archean and Algonkian—are of American birth.

Geologists speak of these splashes of Algonkian rocks as the Unkar group, another local Indian designation.