Answer:The formation of volcanoes is only possible over a "hot-spot", which is why the age and location of the Hawaiian volcanoes are relevant evidence as to past tectonic plate movement.
Step-by-step explanation:
Volcanoes are known to form over what scientists refer to as hot spots. These are patches of seafloor through which magma emerges and over which tectonic plates move. When a plate moves over one of these spots, the magma penetrates the Earth's crust, propelling it upwards and forming a volcano.