Abstract
Pulverulite, a soft, porous, and crumbly rock, is present in the Silurian Lockport Dolomite at a quarry near Rocky Ridge, OH. The great majority of the pulverulite forms bedding-perpendicular pipes. The most common characteristic of the pulverulite, as seen using scanning electron microscopy, is a series of rounded to subrounded masses of dolomite 5–20 µm in diameter. The author interprets that the pulverulite resulted from the downward percolation of very acidic groundwater, that resulted from chemical reactions involving tree roots and groundwater.
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