Can anyone explain these to me and tell me what's what? Is it rhyolite? Is it felsite? Example pics would be awesome too.
How many different types of this rock were utilized in New England? I know of Attleboro Red, Blue Hills, Marblehead... I know there are others but those are the only three I feel I can identify.
Thanks in advance.
How many different types of this rock were utilized in New England? I know of Attleboro Red, Blue Hills, Marblehead... I know there are others but those are the only three I feel I can identify.
Thanks in advance.
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