Trenches are long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.
What happens in the trenches?
Disease and 'shell shock' were rampant in the trenches.
With soldiers fighting in close proximity in the trenches, usually, in unsanitary conditions, infectious diseases such as dysentery, cholera, and typhoid fever were common and spread rapidly.
Where do trenches form and why?
Trenches are formed through subduction, which occurs when tectonic plates collide and push one plate beneath the other. Trenches can be found all over the surface floor of the ocean at subduction zones. The Mariana trench is the deepest known point in the ocean at over 35,000 feet.
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