large/8677/old_coast_road_1402_librivox_64kb_mp3/oldcoastroad_06_edwards_64kb_9
large/8677/old_coast_road_1402_librivox_64kb_mp3/oldcoastroad_06_edwards_64kb
English
8677
The gravel and clay belts of the town have all been stretched out in the same direction as the scratches, and many are the boulders which were combed out of the moving glacier by the peaks of the ledges, and are now poised, like the famous Tipping Rock, just where the glacier left them when it melted. THE GRAVEL AND CLAY BELTS OF THE TOWN HAVE ALL BEEN STRETCHED OUT IN THE SAME DIRECTION AS THE SCRATCHES AND MANY ARE THE BOULDERS WHICH WERE COMBED OUT OF THE MOVING GLACIER BY THE PEAKS OF THE LEDGES AND ARE NOW POISED LIKE THE FAMOUS TIPPING ROCK JUST WHERE THE GLACIER LEFT THEM WHEN IT MELTED
up by the movement of the earth's crust, certain cracks opened and filled with lava, forming dikes. The geologist to-day can glance at these dikes and tell the period of their formation as casually as a jockey looking at a horse's mouth can tell his age. He could also tell of the "faulting," or slipping down, of adjacent masses of solid rock, which has occurred often enough to carve the characteristic Cohasset coast. The making of the rock bottom is a story which extends over millions of years: the making of the soil extends over thousands. The gigantic glacier which once formed all over the northern part of North America, and which remained upon it most of the time until about seven thousand years ago, ground up the rock like a huge mill and heaped its grist into hills and plains and meadows. The marks of it are as easy to see as finger prints in putty. There are scratches on the underlying rock in every part of the town, pointing in the southerly direction in which the glacier moved. ANITE WAS WRINKLED UP BY THE MOVEMENT OF THE EARTH'S CRUST CERTAIN CRACKS OPENED AND FILLED WITH LAVA FORMING DIKES THE GEOLOGIST TO DAY CAN GLANCE AT THESE DIKES AND TELL THE PERIOD OF THEIR FORMATION AS CASUALLY AS A JOCKEY LOOKING AT A HORSE'S MOUTH CAN TELL HIS AGE HE COULD ALSO TELL OF THE FAULTING OR SLIPPING DOWN OF ADJACENT MASSES OF SOLID ROCK WHICH HAS OCCURRED OFTEN ENOUGH TO CARVE THE CHARACTERISTIC COHASIT COAST THE MAKING OF THE ROCK BOTTOM IS A STORY WHICH EXTENDS OVER MILLIONS OF YEARS THE MAKING OF THE SOIL EXTENDS OVER THOUSANDS THE GIGANTIC GLACIER WHICH ONCE FORMED ALL OVER THE NORTHERN PART OF NORTH AMERICA AND WHICH REMAINED UPON IT MOST OF THE TIME UNTIL ABOUT SEVEN THOUSAND YEARS AGO GROUND UP THE ROCK LIKE A HUGE MILL AND HEAPED ITS GRIST INTO HILLS AND PLAINS AND MEADOWS THE MARKS OF IT ARE AS EASY TO SEE AS FINGER PRINTS IN PUTTY THERE ARE SCRATCHES ON THE UNDERLYING ROCK IN EVERY PART OF THE TOWN POINTING IN THE SOUTHERLY DIRECTION IN WHICH THE GLACIER MOVED
large/8677/old_coast_road_1402_librivox_64kb_mp3/oldcoastroad_06_edwards_64kb
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download/librilight/large/8677/old_coast_road_1402_librivox_64kb_mp3/oldcoastroad_06_edwards_64kb.flac