Lower Chanceford Township
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Lower Chanceford Township - – Along the banks of the Susquehanna River at the Holtwood Dam is an exposed of metamorphic rocks. It wasn’t realized by geologists until the early 1990’s that some of these metamorphic rocks actually were metabasalts that were formed along a “mid oceanic ridge” setting during the Early Paleozoic. Some of the metabasalts illustrate pillow structures. Pillows were formed where the hot lava flowed into water, quickly cooling the material. 


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