On the northwestern tip of Wisconsin, where a peninsula of land like a unmanageable hair swirl juts into Lake Superior, twenty-two islands form an archipelago. Named the “Apostle Islands” by someone approximating their number, these bits of land are smothered in white pine and balsam fir, though below is ancient rock from the Precambrian period made up nearly entirely of red sandstone. What happens to sandstone after centuries of wave action, freezing, and thawing? They’re […]