Siêu lũ cổ đại làm biến dạng vỏ Trái Đất
Dấu vết của một trong những trận lũ cổ đại lớn nhất vẫn còn lưu lại ở phía đông bang Washington, tại khu vực có tên Channeled Scablands. Trong thời gian dài, các nhà địa chất học chật vật tìm hiểu đặc điểm động lực của các trận lũ này.
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