Medfield Stone Walls — With a Surprise at the End
July 24, 2021 As the Laurentide Ice Sheet gradually receded 15-30,000 years ago, in the American Midwest, the retreating glaciers easily ground up the soft limestone underneath, leaving the farmer-friendly soil of the Great Plains. But in New England, granite, rather than limestone, was underneath the ice sheets. So, when the ice melted, our forebear […]
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