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What type of rock is this?

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asked Jan 22, 2017 by travmacg (120 points)

2 Answers

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This rock is a Sedimentary rock I don't know the specific name for the individual rock but the group is sedimentary.

Hope this helps!! xx
answered Jan 22, 2017 by anonymous
Can you please specify your reasoning or source behind this comment?
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So, this rock looks like a mix of sand and quartz. Something like a concretion formed by alluvial melt water sand and quartz. The red could be staining from iron oxide. The rock will be very hard if that is the case and you wouldn't be able to mark it with a common nail or a pocketknife. When the glaciers moved they ground stone and sand which mixed with melt water forming these rocks.
answered Jan 24, 2017 by Weasel (55,310 points)
Hard to tell. Its definitely something fine-grained, perhaps quartz/quartzite, perhaps a carbonate-based rock. Try doing an acid test to see if it reacts and bubbles to acid, to identify or rule out its identification within the carbonate class.

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