👉 A mylonitic rock is a type of igneous rock that contains a mixture of minerals from two or more different origins. These minerals are typically quartz, feldspar, and mica, which are found in different volcanic deposits. Mylonites are usually composed of a combination of these three minerals. The composition can vary greatly depending on the specific location and type of igneous rock that formed it. Some examples of mylonitic rocks include granite, basalt, gabbro, and