Here it loses part of its schistose structure, but the separation into parallel layers is still discernible.
Red shale and blue, cinder-grey and lemon-yellow; some schistose and sparkling, the bulk dull and dead.
Still more common is the occurrence of sheared, foliated or schistose forms of gabbro.
It was employed for this purpose along with tiles as far back as the eleventh century in the majority of schistose districts.
A marked schistosity accompanies this alteration, and most of the schistose planes are coated with silvery muscovite.
schistose structure probably does not always denote shearing, at least not the shearing which results from folding.
The average dip of the schistose planes is about 60°; from this they vary up to 90° and down to 20°.
It is made of schistose rock, apparently limestone, of gray color with lighter veins.
They were thickly covered with eucalypti and brush, and, though based upon sandstone, were themselves of a schistose formation.
Immediately above this schistose is a superincumbent mass of sandstone which appeared to form the upper structure of the island.
A highly foliated, medium-grained metamorphic rock that splits easily into flakes or slabs along well-defined planes of mica. The mineral composition of schist is varied and is often reflected in the name given to the rock. For example, a schist that contains garnet is called a garnet schist. A schist containing chlorite is called a chlorite schist.
schistose adjective (shĭs'tōs')