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A general guide for using the Forum with some rules and tips
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Help with identification
  
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metwerks




Joined: 17 Feb 2014
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Location: Milwaukee, WI

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PostPosted: May 31, 2016 07:17    Post subject: Help with identification  
Found the in SE wisconsin and curious to understand the unusual texture. It has an SG of 2.95. You can see areas that chipped away the are dark. I assume this is chemical weathering.

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metwerks




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PostPosted: May 31, 2016 07:19    Post subject: Re: Help with identification  
Added view. Possibly Hornblende??

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Peter Megaw
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PostPosted: May 31, 2016 07:58    Post subject: Re: Help with identification  
Looks like a mafic igneous rock...gabbro or basalt. Hornblende possible but a dark pyroxene more likely. Greenish color suggests possible weathering
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