How thick is a single pane glass window typically? I recently broke the window in my dorm. I was resting my foot on the window, and it just broke underneath. I measured the thickness of the broken window, and found it only to be an eighth inch. I feel almost like I should be the one complaining... Source(s): average window thickness: https://bestanswer.im/e14/average-window-thickness.
By Andrew Alden. Metamorphic rocks are the third great class of rocks. These are what happens when sedimentary and igneous rocks become changed, or metamorphosed (changed in form), by conditions underground. The four main agents that metamorphose rocks are heat, pressure, fluids and strain.
Anything can happen in the Rock Cycle. 1  Igneous rocks can be subjected to heat, pressure, and the action of fluids to form metamorphic rocks. 2  Igneous rocks can be re-melted, forming a new generation of igneous rocks. 3  Sedimentary rocks can be weathered and eroded to form a new generation of sedimentary rocks. Sedimentary rocks may eventually be heated enough to melt, forming a new generation of igneous rocks (although technically they'd be metamorphic by the time they melted). Metamorphic rocks can be weathered and eroded to form sedimentary rocks.