. Annals of the New York Academy of Sciences. Science. OSBORN, REVIEW OF THE PLEISTOCENE 243 cycles of environment and of life which have never prevailed before and will never recur even if the world were to enter a fifth glacial stage, for besides the extraordinary geographic and climatic changes which have been outlined in the previous pages there was the prodigal profusion of life which survived from Pliocene times and has since become extinct. The result of these complex conditions was the assemblage in Europe of animals indigenous to every continent on the globe except South. Fig. 6.—Five
. Annals of the New York Academy of Sciences. Science. OSBORN, REVIEW OF THE PLEISTOCENE 243 cycles of environment and of life which have never prevailed before and will never recur even if the world were to enter a fifth glacial stage, for besides the extraordinary geographic and climatic changes which have been outlined in the previous pages there was the prodigal profusion of life which survived from Pliocene times and has since become extinct. The result of these complex conditions was the assemblage in Europe of animals indigenous to every continent on the globe except South. Fig. 6.—Five chief zoogeographic regions of Europe, Asia and northern Africa from which the mammals migrated into westerti Europe during the Pleistocene America and Australia, and adapted to every climatic life-zone from the warm and dry plains of southern Asia and northern Africa to the tem- perate forests and meadows of Eurasia, from the alpine heights of the Alps, Pyrenees and Altai Mountains to the high, dry steppes of central Asia with their alternating heat of summer and cold of winter, from the tundras or barren grounds of Scandinavia, northern Europe and Siberia to the mild climate of southern Europe. All these animals had been evolving during the Pliocene Epoch in these various habitats and thev. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York Academy of Sciences. New York, New York Academy of Sciences
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1877
