Knowledgebase

Rock identification #922596

Asked December 02, 2025, 12:34 PM EST

I have a rock sample that I would like identified. what type of rock, origin of rock.

Dallas County Iowa

Expert Response

I am sorry, we do not have an expert in rock identification as part of ISU Extension.  You can find several applications on-line that will do this for you.  One is Google and there are others.  We suggest you try them or contact a rock hound group.  Thanks!
Here is another place that you can try and get some help.
https://iowageologicalsurvey.uiowa.edu/contact-us/ask-geologist
I hope this helps!

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