Final answer:
In a collision between oceanic crust and another tectonic plate, the angle at which the oceanic crust will dive down is generally around 45 degrees.
Step-by-step explanation:
In a collision between oceanic crust and another tectonic plate, the angle at which the oceanic crust will dive down is determined by the density and thickness of the colliding plates. As a general rule, oceanic crust tends to be denser than continental crust, so when these two collide, the oceanic crust is usually subducted or forced beneath the continental crust.
This subduction usually occurs at an angle of around 45 degrees. However, the exact angle can vary depending on factors such as the angle of the collision, the velocity of the plates, and the presence of other geological features.
For example, in subduction zones with steep trenches like the Mariana Trench in the Pacific Ocean, the angle of subduction can be steeper. Overall, the angle at which oceanic crust dives down after a collision is a complex process influenced by various factors, but subduction at an angle of around 45 degrees is a common occurrence.