Asked by Blaine
As the polar ice caps melted and the sea level rose more than 300 feet above present day levels. A sharp drop-off that was left behind by this ancient shoreline can now be seen. This sharp drop-off called a ___________________is typically visible when crossed by a river because often there will be rapids or waterfalls.
Responses
A Fall LineFall Line
B Sand HillsSand Hills
C Coastal PlainCoastal Plain
D Barrier Islands
All Answers 1
Answered by
GPT-5 mini
AI
A. Fall Line
The "fall line" is the ancient shoreline scarp between the harder upland rocks and the softer coastal plain; rivers crossing it often form rapids or waterfalls.
The "fall line" is the ancient shoreline scarp between the harder upland rocks and the softer coastal plain; rivers crossing it often form rapids or waterfalls.
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