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Atlantic Seaboard fall line (Geography Dictionary)

Atlantic Seaboard fall line : The physiographic border between the Piedmont and Atlantic coastal plain regions of eastern North America. The name derives from the river rapids and waterfalls that occur as the water flows from the hard rocks of the higher piedmont onto the softer rocks of the coastal plain

_ ស្វែងរកឬបកប្រែពាក្យផ្សេងទៀតនៅប្រអប់នេះ៖
_ខាងក្រោមនេះជាសៀវភៅនិងឯកសារសម្រាប់ការងារនិងរៀនគ្រប់ប្រភេទ៖
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