<span>Basaltic magma which is made of silica compounds is the source of the the lava that flows and is erupted from Volcanoes in the state of Hawaii. The amount of silica in each batch may differ, but it remains true that Hawaiian magma is basaltic.</span>
Ukraine touches both the black sea and Poland
Answer: Geological processes occurring today have always occurred in the past.
Answer:
It ranges from 2 to 13 km/s depends upon composition.
Explanation:
The velocity of seismic waves are different throughout the earth because of different composition of the layers inside the earth. Velocity of seismic waves increases with depth and it is approximately 2 to 8 km/s in the Earth's crust whereas, 13 km/s in the deep mantle so it means the velocity of seismic waves is higher in the mantle as compared to earth's crust due to different composition of layers between the mantle and earth crust.
