Why do scientists think the Grand Canyon was once covered by an ocean? (1 point)
• Seawater has been found seeping up through the canyon floor.
• Only an ocean would have the strength to erode the rock forming the Grand Canyon.
• The sedimentary rock type forming layers of the canyon formed under the sea.
• The Grand Canyon is located along coastlines that likely flooded.
1 answer
The sedimentary rock type forming layers of the canyon formed under the sea.