In reverse, ultramylonite-like rocks are sometimes "deformed pseudotachylyte".[5][6][7][8] Mesomylonites have undergone an appreciable amount of grainsize reduction, and are defined by their modal percentage of matrix grains being between 50 and 90%.[9][10] Protomylonites are mylonites which have experienced limited grainsize reduction, and are defined by their modal percentage of matrix grains being less than 50%. Because mylonitisation is incomplete in these rocks, relict grains and textures are apparent, and some protomylonites can resemble foliated cataclasite or even some schists. Phyllonites are phyllosilicate (e.g., chlorite or mica)-rich mylonites.