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How you can you tell concrete is sedimentary rock?

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Concrete can not be a Sedimentary rock because it fails one of the first criteria for being a rock of any kind - being 'naturally occurring' . All rocks are naturally occurring aggregates or mixtures of one or more minerals and by definition “ a mineral is a naturally occurring…. read more

Concrete is not a sedimentary rock - it is not formed naturally. The correct term for a rock looking very much like concrete is a conglomerate or more specifically a conglomeratic calcrete containing pebbles set in a calcareous matrix or cement. read more

Concrete is not naturally occurring, and hence gets disqualified instantly from being called a sedimentary rock. Second, you could make concrete within hours and my knowledge is that rocks take ages to form. Although, you could say that concrete production involves a lot of sedimentary rocks like limestone and sandstone. read more

If your rock is glassy, like obsidian, you may have a volcanic igneous rock. if your rock has holes in it, like pumice, you may have a volcanic igneous rock If the rock is metamorphic; again, you need to look for certain minerals and structures that could point you to this conclusion. read more

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