. The American educator; completely remodelled and rewritten from original text of the New practical reference library, with new plans and additional material. thehighest peaks would not be so high abovethe level surface of the land as the highestparts of the continental shelf would beabove the bottom of the trough. The WestIndies and other islands would appear likegiant mountains rising from the oceanfloor. What are the dimensions and characterof the continental shelf? The great fringe around North America ex-tends southward to within 500 miles of theequator, and probably reaches nearer thant
. The American educator; completely remodelled and rewritten from original text of the New practical reference library, with new plans and additional material. thehighest peaks would not be so high abovethe level surface of the land as the highestparts of the continental shelf would beabove the bottom of the trough. The WestIndies and other islands would appear likegiant mountains rising from the oceanfloor. What are the dimensions and characterof the continental shelf? The great fringe around North America ex-tends southward to within 500 miles of theequator, and probably reaches nearer thanthat to the North Pole. The water cover-ing it is 100 fathoms deep (about 600 feet).Counting the irregularities of its border,its circumference is about equal to that ofthe earth, or 25,000 miles. It is about fiftymiles in average width, and has an areaof about 1,000,000 square miles. It is com-posed chiefly of sediment washed from theland, and deposits of mud and ooze, formedby the hard parts of myriad plants andanimals living in the sea. In the northernregions the shelf has been partially builtup by the debris carried seaward by shoreice and
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Keywords: ., bookauthorhughesja, bookcentury1900, bookdecade1910, bookyear1919
