why do the crystals in gneiss line up in bands

Get a solid fire,water, and lightning, type. I. E. typhlosion for fire, gyrados for water, raikou for lightning. From there I would just snag some guys you really like with sol
id moves. For me I chose tyranitar, ursaring and steelix. Each is fairly strong and can know great moves like hyper beam(ursaring can learn thunderpunch,icepunch,and firepunch. ) What Type of Rock Is It?

What Does It Look Like? Serpentinite feels very slippery. It is more a broken rock than it is a layered rock. The "layers" are sort of flat plates of green rock. They may be thin or more than 2cm thick.

Serpentinite is usually green to grayish-green. The flat plates may have long scratch like grooves in them. It may be dull or nearly glassy looking. When serpentine is dull it may be fine to coarse grained. When it is glassy it looks very smooth and has no visible grains. What Minerals Make Up the Rock?

Mostly antigorite, amesite, and lizardite. Sometimes: chrysotile (a type of asbestos), brucite, magnesite, chromite, magnetite and garnets. Talc is often found because serpentine alters to talc. How Was It Formed? When an ocean floor plate collides with a continental plate, giant slices of the oceanic crust are pushed up into the rocks of the continent.

A rock, called peridotite, at the bottom of the oceanic plate is changed to serpentinite because there is less weight on it, the temperature is lower, and water circulates through it. Serpentinite is usually found in mountains that were once at the edge of a continent.

Another way serpentinite can form is from peridotites that crystallize deep in the earth's crust from magma. The peridotites are gradually uncovered by erosion, and as they get close to the surface, they alter to serpentinite. Compare To:,