large/8677/old_coast_road_1402_librivox_64kb_mp3/oldcoastroad_06_edwards_64kb_44
large/8677/old_coast_road_1402_librivox_64kb_mp3/oldcoastroad_06_edwards_64kb
English
8677
There are scratches on the underlying rock in every part of the town, pointing in the southerly direction in which the glacier moved. THERE ARE SCRATCHES ON THE UNDERLYING ROCK IN EVERY PART OF THE TOWN POINTING IN THE SOUTHERLY DIRECTION IN WHICH THE GLACIER MOVED
dredth part of an inch every year in order to lose two or three miles of it in twenty-five million years. As the granite 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 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. OF LESS THAN A HUNDREDTH PART OF AN INCH EVERY YEAR IN ORDER TO LOSE TWO OR THREE MILES OF IT IN TWENTY FIVE MILLION YEARS AS THE GRANITE 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
large/8677/old_coast_road_1402_librivox_64kb_mp3/oldcoastroad_06_edwards_64kb
file
download/librilight/large/8677/old_coast_road_1402_librivox_64kb_mp3/oldcoastroad_06_edwards_64kb.flac