ABSTRACT
Upraised Shells of La Plata — Bahia Blanca, Sand-dunes and Pumice-pebbles-Step-formed Plains of Patagonia, with upraised Shells-Terrace-bounded Valley of Santa Cruz, formerly a Sea-strait — Upraised Shells of Tierra del Fuego — Length and breadth of the elevated area — Equability of the movements, as shown by the similar heights of the plains — Slowness of the elevatory process — Mode of formation of the step-formed plains-Summary — Great Shingle Formation of Patagonia; its extent, origin, and distribution — Formation of sea-cliffs.
