Swedish immigrant Olof Öhman said that he found the stone late in 1898 while clearing land he had recently acquired of trees and stumps before plowing. The stone was said to be near the crest of a small knoll rising above the wetlands, lying face down and tangled in the root system of a stunted poplar tree, estimated to be from less than 10 to about 40 years old. The artifact is about 30 × 16 × 6 inches (76 × 41 × 15 cm) in size and weighs . Öhman's ten-year-old son, Edward Öhman, noticed some markings, and the farmer later said he thought they had found an "Indian almanac."