Schist is a textural term, meaning
that the rock shows foliation -- a way of splitting along planes, which are usually
somewhat wavy and discontinuous. Many times schist has sort of a glistening or shiny
look. There are many places around Phoenix and Scottsdale where one can find schist.
It is a metamorphic rock, meaning that is has been changed by heat and
pressure from its previous form, usually a sedimentary rock. The heat and pressure
were responsible for its "new" look.
The road cut on the Squaw Peak Freeway, SR51, cutting through the Squaw Peak
area, is a good place to see big outcrops of schist.
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