To all science will mark i need urgent !
1.) what is the composition of gneiss
2.) what is the parent rock of marble and what is its main mineral/ composition?
3.) what is the parent rock of slate and what is its main mineral/ composition?
4.) what is the parent rock of quartzite and what is its main mineral/ composition?

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.

I hope this helps good luck!

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homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.