Igneous Rock ID?

[billhubbs]

Hello, new to the forum, happy to be here. Wanted to see if anyone could help me ID these red/brown/black rocks I've been finding off to the side of a path in Greene County, New York. Very fine grain, scratches glass. Varies from red black to a blue black. Almost like an obsidian, but not as glassy?

Thanks so much!

Bill

 

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[Kray Gelder]

I believe you have found some chert. Not igneous.

 

[billhubbs]

Ha, thanks!