What is likely to occur at a plate boundary where oceanic crust collides with continental crust?

A converging boundary is most likely a place where the heat of the convection currents in the mantle is moving downward. This downward movement of the heat also results in a downward movement of the crust.

As the oceanic crust is thinner and more dense than the continental crust it is the oceanic crust that is drawn ( pushed) down into the mantle and melted. This results in the destruction of the sedimentary layers and fossils of the oceanic crust.

As the oceanic crust is pushed down the continental crust overrides the oceanic crust and is pushed up. This result is mountain ranges being formed at the convergent boundary of an oceanic crust and a continental crust. Also the magma from the melted oceanic crust rises to the surface, resulting in volcano's along the edge of the convergent boundary.

The large movements of the tectonic plates result in earthquakes. By plotting the location and depth of the earthquakes the shape of the subduction zone can be seen. Near the boundary the earthquakes are near the surface. Further from the boundary the earthquakes are progressively deeper in the earth.

So at the converging boundary of an oceanic tectonic plate and a continental tectonic plate, the oceanic plate is subducted resulting in mountain building, volcanos and earthquakes. The sedimentary layers of the oceanic crust with its fossils are destroyed, melted and turned back into magma and the mantle.

At a plate boundary where oceanic crust collides with continental crust, several geological phenomena are likely to occur. These include:

1. Subduction: Oceanic crust is denser than continental crust, so it typically subducts beneath the continental crust. This process forms deep oceanic trenches where the oceanic plate descends into the mantle.

2. Formation of Volcanoes: As the oceanic crust subducts, it melts due to the high temperatures and pressure in the mantle. This molten magma rises through weaknesses in the continental crust, leading to the formation of volcanic arcs on the continental side of the boundary.

3. Earthquakes: The collision and subduction of tectonic plates generate intense seismic activity, resulting in earthquakes. These earthquakes can be shallow or deep, depending on the depth of the subduction zone.

4. Mountain Building: The compression caused by the collision between oceanic and continental crusts can lead to the uplift and folding of the continental crust, resulting in the formation of mountain ranges.

5. Crustal Deformation: The collision may cause the crust to deform, leading to the formation of faults, folds, and other geological structures.

Overall, the collision between oceanic and continental crusts at plate boundaries results in complex geological processes that shape the Earth's surface and contribute to the dynamic nature of tectonic activity.