D. T. Macdougal Salton Sea

Annotation

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The geological and biological processes of the surface layers of the earth's crust are profoundly different under subaerial exposures to those which prevail under subaqueous conditions. Any region, therefore, which may be subjected to submergence and to weather ing, alternately, will offer a changing complex of environic conditions, with accompanying disturbances in the balance and distributional movements of the organisms of the region.