World's Oldest Rock

World's Oldest Rock (HM1AZ1)

Location: Granite Falls, MN 56241 Yellow Medicine County
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Country: United States of America
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N 44° 48.199', W 95° 32.77'

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Site of some of the oldest exposed rock in the world. Geologists estimate this Granitic Gneiss was formed 3,800,000,000 years ago.
Erected by
the Yellow Medicine County Historical Society
HM NumberHM1AZ1
Year Placed1975
Placed ByThe Yellow Medicine County Historical Society
Marker ConditionNo reports yet
Date Added Tuesday, October 14th, 2014 at 9:11am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)15T E 298637 N 4964255
Decimal Degrees44.80331667, -95.54616667
Degrees and Decimal MinutesN 44° 48.199', W 95° 32.77'
Degrees, Minutes and Seconds44° 48' 11.94" N, 95° 32' 46.20" W
Driving DirectionsGoogle Maps
Area Code(s)320, 507
Closest Postal AddressAt or near 28-34 540th St, Granite Falls MN 56241, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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