QUARTZITE
Colour: White, grey, reddish.
Texture: Medium-grained; usually of a granoblastic texture.
Structure: Usually massive but primary sedimentary features may
be preserved, such as bedding, graded bedding or current bedding.
Mineralogy: Essentially composed of tightly interlocking grains
of quartz. A little feldspar or mica may also be evident. White
varieties are distinguished from marble by their greater hardness.
Field relations: Quartzites are metamorphosed quartz sandstones
and are found in association with other metamorphosed sedimentary
rocks such as phyllite, schist and marble." (Hamilton
et al 1976, 188)
quartzite
flakes
