Question

identify the geologic events or features resulting from this collision.

Answer 1

Answer:

The Earth’s outer crust (the lithosphere) is composed of a series of tectonic plates that move on a hot flowing mantle layer called the asthenosphere. Heat within the asthenosphere creates convection currents that cause tectonic plates to move several centimeters per year relative to each other. When two tectonic plates meet, we get a “plate boundary.” There are three major types of plate boundaries, each associated with the formation of a variety of geologic features.

If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. Deep trenches are features often formed where tectonic plates are being subducted and earthquakes are common. As the sinking plate moves deeper into the mantle, fluids are released from the rock causing the overlying mantle to partially melt. The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary.

When two plates are moving away from each other, we call this a divergent plate boundary. Along these boundaries, magma rises from deep within the Earth and erupts to form new crust on the lithosphere. Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges. While the process of forming these mountain ranges is volcanic, volcanoes and earthquakes along oceanic spreading ridges are not as violent as they are at convergent plate boundaries.

The third type of plate boundary occurs where tectonic plates slide horizontally past each other. This is known as a transform plate boundary. As the plates rub against each other, huge stresses can cause portions of the rock to break, resulting in earthquakes. Places where these breaks occur are called faults. A well-known example of a transform plate boundary is the San Andreas Fault in California.

Answer 2

identify the geologic events or features resulting from this collision.

• A convergent plate boundary is created when two tectonic plates clash. Subduction is the process of one of the convergent plates moving beneath the other. Where tectonic plates are subducting, deep trenches frequently occur, and subduction zones frequently experience earthquakes as well.

• Instead, the rock near the boundary is crunched and folded by the collision of two continental plates, raising it up and creating mountains and mountain ranges.

• Two tectonic plates that are moving toward one another are said to be at a "convergent plate border," which frequently results in one plate sliding beneath the other (in a process known as subduction). Mountains can grow, volcanoes can erupt, and other geological phenomena can be caused by the collision of tectonic plates.
• When one plate is oceanic, there are sizable volcanoes along the convergent plate border. The lines that delineate the subduction zone are where you can find these volcanoes. These regions are also subject to earthquakes. A line of volcanoes known as a continental arc is created when an oceanic plate subducts beneath a continental plate.
• When a sea gets smaller until both plates meet, two continental plates collide. The oceanic lithosphere separates after the impact and dives into the mantle. Eventually, the subduction zone stops being active. The compression of the two continents over time causes them to fuse together.

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