The Phyllite unit, which is found around Hawzien town, Tigray Northern Ethiopia, isrnknown as the intervening zone between the two main groups of the Neoproterozoicrnbasement rocks of Northern Ethiopia. The two groups, Tsaliet Group and TambienrnGroup, generally consist of metavolcanics and metasediments respectively. These lowgradernmetamorphic rocks, which constitute the southern Arabian-Nubian Shield, are thernleast studied zone among Precambrian rocks of the country. As a result the Phyllite unitrnhas been variously interpreted; as metasedimentary (Arkin et al., 1971), metavolcanicrn(Garland, 1972, 1980) and transitional lithology (Miller et al., 2003).Moreover, the unitrnhas been depicted as a single lithology in various geological maps.rnHowever the detailed mapping, field investigation, petrographic study and data analysisrnrevealed that the zone is not a single monotonous unit.rnIt consists of various units and subunits; including different type of phyllites such asrnspotty qurtzo feldspathic phyllite, undifferentiated slate and phyllite, chloritic slate andrnphyllite, spotty micaceous phyllite, metagreywake, metasubintrusives, granitoids, graphiternand quartz vein.rnThe key mineral assemblages such as sericite muscovite, chlorite and albite, indicate thernrocks in area experienced low-grade metamorphism that belongs to lower green schistrnfacies. The occurrence of relict and preserved primary structure like bedding also implyrnthe prevalence of the low-grade metamorphism.rnStructural data analysis, both mesoscopic and microscopic, discloses the study area hasrnexperienced at least three phases of deformation. D1 resulted in the development of thernpervasive N-S trending and west dipping secondary foliation (S1). Whereas the laterrnphase of deformation (D2) has caused the formation of incipient S2 cleavage andrnmesoscopic and regional scale overturned folds.rnThe E-W trending and vertically dipping joints that cross cut bedding and foliations arernrelated to D3.