The astronomical event that represents the great serpent mound is Halley's Comet.
Answer:
True
Explanation:
A failed rift occurs when there is a failed continental rifting whose activities continued until the point of breakup. An example is in the Eastern part of Nigeria which is dominated by the Benue trough which trends Northeast is considered as a failed rift.
Answer:
High heat and lower pressure at the base of the lithosphere (tectonic plate) facilitates melting of the rock. This melt, called magma, rises through cracks and erupts to form volcanoes. As the tectonic plate moves over the stationary hot spot, the volcanoes are rafted away and new ones form in their place.
Explanation: hope this helped