Anybody knowledgeable about the origins of black quartzite? I apologize for the poor picture quality, my camera doesn't do well at the needed focal depth. It occurs at about a rate of one in seventy cobbles in the local streams.
And it's different in color from the ferruginous Rose Hill Formation, or at least I thought so. When lightened with software they have a little purplish tint, as posted. The fire treated Antietam Clagett is just for color comparison. Any input would be appreciated.
And it's different in color from the ferruginous Rose Hill Formation, or at least I thought so. When lightened with software they have a little purplish tint, as posted. The fire treated Antietam Clagett is just for color comparison. Any input would be appreciated.
Comment