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Sandstone i believe
Quartz is a mineral that is resistant to weathering due to its chemistry and crystalline structure. Granite will weather faster than quartzite because granite is only partially quartz in composition.
Mud or clay-sized particles. Quartz, feldspars.
Sandstone is a type of clastic sedimentary rock with sand-sized minerals or sand grains. Its two chief minerals are quartz and feldspar.
In bite sized pieces
shist
Bite-sized.
Siltstone is a sedimentary rock composed of cemented silt-sized particles of quartz and feldspar, primarily.
Yes. If you cut them into bite-sized fish pieces.
wind
Appropirate sized, rod, patches, jag, solvent.
maybe, if you cut them up in to little bite-sized pieces