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Light and dark banding exists on all three rock classifications.

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17y ago

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Some weathered rocks have rust streaks due to the iron content in the rocks. When rocks that have ferrous iron are weathered there will be rust streaks present.


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Weathered rocks with rust streaks are likely to contain iron minerals that oxidize when exposed to air and water, forming iron oxide, or rust. This process occurs over time through a series of chemical reactions, giving the rocks their characteristic rusty appearance.


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