The Climatic Changes of Later Geological Times: A Discussion Based on Observations Made in the Cordilleras of North AmericaMuseum, 1882 - 394 Seiten |
Andere Ausgaben - Alle anzeigen
The Climatic Changes of Later Geological Times: A Discussion Based on ... Josiah Dwight Whitney Keine Leseprobe verfügbar - 1882 |
Häufige Begriffe und Wortgruppen
abundant accumulations adjacent Alps altitude amount appears Arctic Asia Basin boulders California cañon Cascade Range cause change of climate character climatic change coast connection considerable continent Cordilleras covered débris deposits depression descended desiccation detrital material diminution earth earth's surface east eastern elevation entirely erosion evidence existence explored extensive fact farther favorable feet forests formation former glaciation geological ages geological periods Geological Survey geologists Glacial epoch glaciers granite gravel Greenland indicated investigations lakes land latitude mean temperature miles Miocene moraines Mount Brewer Mount Shasta nearly névé North America Northern Drift observed occupied occurrence ocean orographic parallel Peak period phenomena Pliocene Polar portion preceding pages precipitation present writer proof rain-fall range reference regard remarks result River rock Rocky Mountains sea-level side Sierra Nevada slope snow and ice southern square miles striation summit tion Tuolumne Tuolumne River valley Vancouver Island whole Yosemite
Beliebte Passagen
Seite 179 - There are parts of Asia Minor, of Northern Africa, of Greece, and even of Alpine Europe, where the operation of causes set in action by man has brought the face of the earth to a desolation almost as complete as that of the moon ; and though, within that brief space of time xvhich we call
Seite 179 - The earth is fast becoming an unfit home for its noblest inhabitant, and another era of equal human crime and human improvidence, and of like duration with that through which...
Seite 312 - It was a beautifully clear evening, and we had a most enchanting view of the two magnificent ranges of mountains, whose lofty peaks, perfectly covered with eternal snow, rose to elevations varying from seven to ten thousand feet above the level of the ocean.
Seite 212 - From what I have seen of the deep-sea bottom, I am already led to infer that among the rocks forming the bulk of the stratified crust of our globe, from the oldest to the youngest formation, there are probably none which have been formed in very deep waters.
Seite 148 - Lekone is about 200 feet above that of the Zambesi at the Falls, and considerably more than the altitude of Linyanti; consequently, •when the river flowed along this ancient bed, instead of through the rent, the •whole country between this and the ridge beyond Libebe westwards, Lake 'Ngami and the Zouga southwards, and eastwards beyond Nchokotsa was one large freshwater lake. There is abundant evidence of the existence and extent of this vast lake in the longitudes indicated, and stretching from...
Seite 178 - But man is everywhere a disturbing agent. Wherever he plants his foot, the harmonies of nature are turned to discords.
Seite 148 - BO does the Orange River in the west ; while other rents made in the eastern ridge, as the Victoria Falls and those to the east of Tanganyenka, allowed the central waters to drain eastward. All the African lakes hitherto discovered are shallow, in consequence of being the mere residua of very much larger ancient bodies of water.
Seite 71 - There is nothing anywhere in California which indicates a general glacial epoch during which ice covered the whole country and moved bodies of detritus over the surface, independently of its present configuration, as is seen throughout the Northeastern States.
Seite 101 - ... Topographical Engineer Corps to survey Great Salt Lake. In October and November of that year, preliminary to the survey, he made a circuit of the shores of the lake. Stansbury found a vast stretch of level land adjoining the lake on the north and west: " 'This extensive flat appears to have formed, at one time, the northern portion of the lake, for it is now but slightly above its present level. Upon the slope of a ridge connected with this plain, thirteen distinct successive benches, or watermarks,...
Seite 179 - ... they are known to have been covered with luxuriant woods, verdant pastures, and fertile meadows, they are now too far deteriorated to be reclaimable by man, nor can they...