Surface geology and agricultural conditions of Michigan . J GLACIATED GRANITE KNOBS, FOURTEEN MILES NORTH 01 CHAMPION. Michigan Geological andBiological Survey. Publication 25, Geological Series 21,Plate B GLACIATED ROCK SURFACE BAST OF tSHPEMINQ THE NORTHERN PENINSULA. 61 glaciated, firm rock surfaces are laid bare by the removal of themantle of soil and loose rock material. Prominent knobs of rockare sometimes rubbed to almost glassy smoothness, or their surfacesare scored heavily with deep furrows running in the direction of theice movement. The- rock surfaces also often exhibit a mult
Surface geology and agricultural conditions of Michigan . J GLACIATED GRANITE KNOBS, FOURTEEN MILES NORTH 01 CHAMPION. Michigan Geological andBiological Survey. Publication 25, Geological Series 21,Plate B GLACIATED ROCK SURFACE BAST OF tSHPEMINQ THE NORTHERN PENINSULA. 61 glaciated, firm rock surfaces are laid bare by the removal of themantle of soil and loose rock material. Prominent knobs of rockare sometimes rubbed to almost glassy smoothness, or their surfacesare scored heavily with deep furrows running in the direction of theice movement. The- rock surfaces also often exhibit a multitude offine lines or striae trending in the same direction. In many partsof the elevated western end of the Northern Peninsula the smoothrock bosses are striking features of the landscape. From command-ing points one often obtains a view several square miles in extent inwhich the bare rock surfaces may be seen glistening among the treetops or rising above the highest of the forest trees. Such a land-scape is shown in Plate V, B which contains a view taken in theHuron Mountain district north of Champion. These rock bossesare often more heavily glaciated on the side against which the iceadvanced than o
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