Answer:
1)The lighter bands contain mostly quartz and feldspar, the darker often contain biotite, hornblende, garnet or graphite.
2)Marble is a metamorphic rock form composed of coarse crystals from parent limestone or dolostone rocks. Pure marble is white and composed of the mineral calcite.
3)Mudstone is the parent rock of slate. Slate is a product of regional metamorphism. Mudstone is made up of silt- and clay-size particles. Typically, the "clay-size" particles are made of clay minerals (illite, smectite, kaolinite, and chlorite).
4)Quartzite is composed of sandstone that has been metamorphosed. Quartzite is much harder than the parent rock, sandstone. It forms from sandstone that has come into contact with deeply buried magmas.
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