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On June 3rd, 1890, E.J. Longyear at this site completed to a depth of 1293 ft., the first diamond drill test hole for iron ore in the state of Minnesota
Dedicated to the memory of Dorthea and Richard P. Longyear — — Map (db m106643) HM
Approximately 1,400 feet from this point, the first diamond drill hole in the state of Minnesota was sunk in 1890. E. J. Longyear began drilling June 3, 1890 and completed operations on the hole December 9, 1890. Reaching a depth of 1293 feet, . . . — — Map (db m106642) HM
On May 27, 1890 E.J. Longyear established a tent camp for his crew and himself near the tripod of the drill. He brought his bride to the drill site in September 1890. Constructed on the hill was a two room building made of rough pine boards from a . . . — — Map (db m106640) HM
This piece of rock is from the lower part of the Upper Slaty Member-Biwabik Formation. The rock consists of thin wavy beds of magnetite—magnetic, black fine grained argillite & irregular shaped pods or lenses of chert/silicate. This rock is . . . — — Map (db m106645)
