#collision boundaries

[forrow-isle]

I know most people know this already, but I figured I’d do a little video of my rock-thwacking technique and hole/object placement. 

1. Imagine the 8 tiles around the rock

2. Stand on a corner tile and put a hole (or have a tree or fence or whatever) immediately on the two sides of that tile away from the rock

3. Aim toward rock, spam A

4. Done

[a2geographyprocrastination]

1. Plate Movement - Convergent margins (pt.2) - collision

Collision plate boundaries occur where two plates of continental crust converge.

Since the plates forming continental crust have a much lower density than the underlying layers of lithosphere, there is not much subduction where they converge. Instead, the edges of the plates and the sediments on top are forced to fold and buckle to form Fold Mountains as the plates converge.

^this picture really clearly shows folded and deformed rock sediments!

Vulcanicity Is not commonly found at collision margins, as not much subduction occurs.

Seismicity Is frequent and capable of producing large magnitude earthquakes due to the friction build up and land mass settling as the plates collide.

Example:

The Himalayas are an example of fold mountains that are still growing, where the Indian plate is colliding with the Eurasian plate.

The Himalayas are currently the tallest mountain chain on earth, but eventually erosion may reduce the himalayas to the height of the Alps and other, older mountain chains that are relics of past tectonic activity.