👉 In geology and mineralogy, a "premycotic" is a type of igneous rock that has not undergone any cooling or cooling processes during its formation. This means it was formed in a magma chamber at high pressure and temperature conditions, but it did not cool down to the point where it could form a solid rock again. Instead, it cooled slowly over time, leaving behind a thin layer of magma that is often visible on top of other rocks. The term "premyc