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corrasion    

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  • THE MASONTOWN AND UNIONTOWN QUADRANGLES
    tream near the mouth of Whiteley Creek If the change was produced by lateral corrasion at the base of the promontory on the inside of the curve, the ridge north of Cats Creek should nar row to a point at its western extremity, but this ridge, as shown on the map, is square-ended next the river and gives no indication of having been cut through
  • rrHE MUD LUMPS Arr rrHE ~IOUrfHS 01~ rrHE MISSISSIPPI
    Almost all the mud lumps occur near bars at the mouths of the river These bars are great piles of sediment which accumulate where the branches or passes of the river enter the sea Their crests are naturally only about 10 feet under water, whereas for 200 miles upstream the river is 50 to 200 feet deep, but the United States engi neers have made channels 30 to 35 feet deep and several hundred
  • PRELIMINARY ESTIMATES OF THE STRENGTH OF PREHISTORIC SHAKING WASHINGTON . . .
    A preliminary geotechnical engineering analysis, made to assess the strength of shaking required to form the dikes in the islands, yields results consistent with theoretically and statistically derived accelerations for a M~8 earthquake whose energy source is located about 35 kilometers offshore The liquefaction effects are evaluated by using the procedure of Seed et al , in terms of 0 5
  • Dendrogeomorphic Evidence and Dating of Recent Debris Flows on Mount . . .
    This corrasion can result in termination of radial growth where the tree was struck In subsequent years the scar will be increas ingly covered by callus growth until the damaged area is completely covered and the cambium is once again continuous around the trunk
  • OFR 91-502 - Section 1 - USGS Publications Warehouse
    These anomalies include corrasion scars, tilt sprouts, eccentric growth rings, and suppressionor release sequences Thus, by coring or taking cross-sectionsof affected stems and counting the number of growth rings since the plant was affected, the number of years since the event occurred can be determined These techniques have been used in
  • THE BROWNSVILLE AND CONNELLSVILLE QUADRANGLES
    ged to cut new channels by lateral corrasion Striking examples of such action are shown in the Latrobe quadrangle, where, for 10 miles from Chest nut Ridge, Conemaugh River shows rock shelves from 1 to 2 miles wide, deeply
  • DESCRIPTION OF THE HUNTINGDON QUADRANGLE.
    and capturing a large branch of Tug Fork This greatly augmented the volume of the stream and increased its power of corrasion, so that it ha cut directly down in its former channel Since it was thus enlarged, however, conditions have not been favorable for the acquisition of ter ritory on either side, although the river is flowing at a leve
  • Recent Sedimentation and Erosional History of Fivemile Creek Fremont . . .
    stiges of flood plains, and flood plains are usually produced by lateral corrasion " At the present time, however, many ten ace systems are attributed to climatic fluctuations of glacial and postglacial time Cotton believes (1948, p 206) that a similarity in terrace patterns rom one valley to an other indicates that climatic change probably
  • DESCRIPTION OF THE GOLD BELT.
    akes are in general not deep Level meadows of alluvial soil mark the site of many former lakes, which have been drained by silting or by corrasion of their outlets; such are, for instance, Twin Valley and the meadows of Little Truckee Riv
  • DESCRIPTION OF THE POCAHONTAS SHEET.
    nearly to the baselevel of erosion By lateral corrasion these narrow gorges are gradually widened and the sides reduced from precipitous cliffs to gentle slopes The divides between adjacent streams are, little by little, worn away, and the surface gradually approach





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