Answer:
No.for example the tunguska event in 1908.an asteroid entered the atmosphere,exploded and sent pieces flying down 3-6miles to the surface
I hope this helps
Submarine Canyon
Submarine Canyon's are steep-sided valley canyons cut into the seabed of the continental slope.
Volcano/hot spot they are made of many plumesbof lava coming out of the mantal and hardening. After a long time, the crust moves from continental drift but the hot spot stays in the same spot there for creating a new island