On October 9, 1933, amateur archaeologist William H. Jensen uncovered the badly broken skeleton of a man in a gravel pit on a plateau about half a mile south. The plateau had formed as an island in the ancient River Warren, an outlet of Glacial Lake Agassiz. From parallel-flaked flint spear points found in the grave and surrounding geological evidence, University of Minnesota archaeologists estimated that the burial dated to about 6000 B.C. The reconstructed skull, measured at the university, was that of an adult male between 25 and 40 years of age who possessed many of the physical characteristics of the North American Indian. No additional traces of his culture were discovered in the immediate vicinity. After the skeleton was returned to Jensen, it disappeared for a time, deepening the mystery surrounding Browns Valley Man, but the Jensen family rediscovered it in 1987. Radiocarbon dating has since dated the skeleton to 9,000 years ago, making it one of the earliest skeletons yet found in the New World.