Tag: pressure
Gneiss: what is it?
The gneiss is a metamorphic rock composing the continental crust. It mainly contains quartz, micas, feldspars plagioclases and sometimes alkaline feldspars. The color of the rock is variable, but often…
Metamorphism: what is it?
Metamorphism is an essential process in geology. It represents all the transformations that a rock undergoes when it is subjected to an increase in pressure and / or temperature. The…
Pain, pressure in the heart, attention to burning! Occurs with more effort
Heart spasm basically occurs as a result of not feeding the heart enough due to the contraction of the arteries feeding the heart tissue. It causes severe pain in the…