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In climbing back, my eye, now sharpened by my geologic reading, dwelt frequently and long upon the horizon where that cross-bedded Carboniferous sandstone joins the Carboniferous limestone above it. How much older the sandstone looked! I could not avoid the impression that its surface must have formed a plane of erosion ages and ages before the limestone had been laid down upon it.
But having availed ourselves of the aid of meteorology, we have a story that is full of marvelous interest the great story of the evolution of the cornfield. In this story we find many alluring details of evaporation, air movements, precipitation, erosion, and the attraction of gravitation. But in all this we are but lingering in the anteroom of agriculture.
He had thawed and panned it; to his amazement, he had discovered that it carried an astonishing value in gold coarse, rough gold exactly like that in the creek pay-streak, except with less signs of abrasion and erosion. Rumor placed the contents of that first prospect at ten dollars. Ten cents would have meant the riches of Aladdin, but ten dollars! No wonder the wiseacres shook their heads.
#Pneumococcal affections of joints#, the result of infection with the pneumococcus of Fraenkel, are being met with in increasing numbers. The local lesion varies from a synovitis with infiltration of the synovial membrane and effusion of serum or pus, to an acute arthritis with erosion of cartilage, caries of the articular surfaces, and disorganisation of the joint.
This gradual rise would be an era of aqueous erosion and of the deepening, widening, and lengthening of the valleys. It is very improbable that the elevation would be everywhere identical in quantity, but if it was never in excess in the outskirts as compared to the central region or crest of the chain, it would not give rise to lakes.
If you do, I'm offerin' you a good many thousand dollars for the risk." "God bless my soul! where'd I put you? There ain't a bunk." "I've slept by the week on the ice." "There ain't room to lie down." "Then we'll stand up." Lord, Lord! what could you do with such a man? Owner of Idaho Bar, too. "Mechanics of erosion," "Concentrates," "a third interest" it all rang in his head.
The crushed and folded and dislocated strata are laid open to the weather as the horizontal strata, and as the upheaved masses of Archaean rock are not. Moreover, strata of unequal hardness are exposed, and this condition favors rapid erosion. In imagination the geologist is present at the birth of whole mountain-ranges. He sees them gestating in the womb of their mother, the sea.
Desert rivers therefore periodically shorten and lengthen their courses, withering back at times of drought for scores of miles, or even for a hundred miles from the point reached by their waters during seasons of rain. THE GEOLOGICAL WORK OF STREAMS. The work of streams is of three kinds, transportation, erosion, and deposition.
Thus, from our earliest days we have had a tradition of substantial government help to our system of private enterprise. But today the government no longer has vast tracts of rich land to give away and we have discovered, too, that we must spend large sums of money to conserve our land from further erosion and our forests from further depletion.
Then it slumbered through several epochs of geology, representing many millions of years in the bosom of earth, the mother, until at the beginning of the psychozoic era, through erosion or the action of atmospheric influences and nature's chemistry it came to the surface; uncovered and freed from all superimposed stratified rock.
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