A cemetery in New England contains headstones from the seventeenth to the twenty-first centuries.Headstones from the seventeenth century are made of slate.Headstones from the mid-nineteenth century are made of marble.The information on the seventeenth-century headstone is clear and easy to read, whereas the nineteenth-century headstone is now illegible.Why? What weathering has occurred?

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The Answer of A cemetery in New England contains headstones from the seventeenth to the twenty-first centuries.Headstones from the seventeenth century are made of slate.Headstones from the mid-nineteenth century are made of marble.The information on the seventeenth-century headstone is clear and easy to read, whereas the nineteenth-century headstone is now illegible.Why? What weathering has occurred?

A Cemetery in New England Contains Headstones from the Seventeenth