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a rock that has strange red dots on it that needs id


matthew textor

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hi everyone this is matthew again 

today in the creek I found this strange rock with a lot of red dots all over it 

does anyone know what it is ? 

here is a photo

 

IMG_2690.JPG.22c3f44e79dd5b381b3234f3034a893a.JPG

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Hi Matthew,

Looks like Igneous rock. Probably Rhyolite (white) with Garnet crystals (red). Looking where you live the bedrock is Shale. That would mean you have an erratic rock brought down from the Canadian shield by glaciers. The well rounded surface of a very hard rock is another clue to it's glacier history. 

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Im my opinion, this is a fine-grained gneiss (metamorphic rock) or an aplite (igneous rock) with many garnets.

I don´t know how near you are to the Adirondacks, this rock could also be from there. But the Canadian shield and glacier transport is also a possibility.

Franz Bernhard

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30 minutes ago, Rockwood said:

Hornfels lives in that neighborhood ?

Can not be totally excluded, but the red dots are not garnet than.

Franz Bernhard

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