Northeast Gardening: Stones, rocks, boulders and erratics 2, 0 by victorgardener
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In reply to: Stones, rocks, boulders and erratics 2
Forum: Northeast Gardening
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victorgardener wrote: This is a shot of a portion of the Palisades in NY. It is made of diabase, an igneous rock, which pushed up into the overlaying sandstone around 200 million years ago. The sandstone eroded, leaving the columnar looking diabase. |