Man and the Glacial PeriodD. Appleton, 1915 - 385 pagini |
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Pagina viii
... rock gorges in the Delaware and Lehigh Rivers from two hundred to three hundred feet in depth . # But Professor Williams has found that the rock gorges of the Lehigh , and even of its southern tributaries , had been worn down ...
... rock gorges in the Delaware and Lehigh Rivers from two hundred to three hundred feet in depth . # But Professor Williams has found that the rock gorges of the Lehigh , and even of its southern tributaries , had been worn down ...
Pagina ix
... rock , whose mean depth here is about three hundred feet , of which perhaps two hundred and fifty feet may be said to be be rock , " adding that the " exca- vation that intervened between the two epochs in other portions of the ...
... rock , whose mean depth here is about three hundred feet , of which perhaps two hundred and fifty feet may be said to be be rock , " adding that the " exca- vation that intervened between the two epochs in other portions of the ...
Pagina x
... Rock River , Ill . , was seven or eight times as much as that in the later drift farther north ; while Mr. Oscar H. Hershey arrives at nearly the same conclusions from a study of the buried channels in northwestern Illinois . But even ...
... Rock River , Ill . , was seven or eight times as much as that in the later drift farther north ; while Mr. Oscar H. Hershey arrives at nearly the same conclusions from a study of the buried channels in northwestern Illinois . But even ...
Pagina xi
... rock shelf , and are often as much as eighty feet thick . It seems probable , therefore , that the Alleghany and upper Ohio gorge was filled with glacial gravel to a depth of about two hundred and fifty or three hundred feet , as far ...
... rock shelf , and are often as much as eighty feet thick . It seems probable , therefore , that the Alleghany and upper Ohio gorge was filled with glacial gravel to a depth of about two hundred and fifty or three hundred feet , as far ...
Pagina xxix
... rock scored with glacial marks • 20. Scratched stone from the till of Boston 21. Typical section of till in Seattle , Wash . 22. Ideal section showing how the till overlies the stratified rocks . 23. Vessel Rock , a glacial boulder 24 ...
... rock scored with glacial marks • 20. Scratched stone from the till of Boston 21. Typical section of till in Seattle , Wash . 22. Ideal section showing how the till overlies the stratified rocks . 23. Vessel Rock , a glacial boulder 24 ...
Alte ediții - Afișează-le pe toate
Man and the Glacial Period George Frederick Wright,Henry Williamson Haynes Vizualizare completă - 1892 |
Man and the Glacial Period George Frederick Wright,Henry Williamson Haynes Vizualizare completă - 1892 |
Termeni și expresii frecvente
accumulation Alleghany Alps America animals basin boulder-clay boulders cave channel clay cliffs coast continuous County Creek depth discovery distance drainage drift east elevation England erosion Europe evidence extending facts farther fiords flint flow formed Fort Snelling Geological Society geologists glacial deposits Glacial epoch glacial ice glacial motion Glacial period glaciated area glaciated region gorge granite gravel Greenland height hills hundred feet Ice age ice-front ice-sheet implements Irish Sea Island kettle-holes Lake Agassiz Lake Michigan Lake Ontario land latitude lava loess lower marine mass melting miles Mississippi motion névé northern northward numerous occur Ohio Ohio River outlet palæolithic pebbles Pliocene portion preglacial present Professor Rhône Glacier ridges River rock sand shells shore side southern southward species square miles strata streams subsidence surface terminal moraine terraces Tertiary Thenay theory thick thousand feet tion transported Trenton tributary upper valley vicinity western