The scientist first designed thee geologic time scale because.... the people who needed to understand the geological relationship of different rock units were miners. Mining had been of commercial interest since at least the days of the Romans, but it wasn't until the 1500s and 1600s that these efforts produced an interest in local rock relationship.
Key is the answer to this
Answer:
plate tectonics
Explanation:
plate tectonics the theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.
<h3>I'm sorry if the answer wrong xd</h3>
Magma is called
for the <span>dense
mix of dry hot rock fragments and hot gas erupting from volcanic vent at high
speed. Gas bubble, making up the lave are energetic in nature, because they
keep on expanding in all directions, they will go all out to the only open are
of a volcano, the vent, in an upward direction. </span>
