the oldest known rock on earth is located at hudson bay in northern quebec.
where is the oldest known rock on earth located?
hudson bay in northern quebec
some of the oldest surface rock can be found in the canadian shield, australia, africa and in a few other old regions around the world. the ages of these felsic rocks are generally between 2.5 and 3.8 billion years. the approximate ages have a margin of error of millions of years. in 1999, the oldest known rock on earth was dated to 4.031 ±0.003 billion years, and is part of the acasta gneiss of the slave craton in northwestern canada. researchers at mcgill university found a rock with a very old model age for extraction from the mantle (3.8 to 4.28 billion years ago) in the nuvvuagittuq greenstone belt on the coast of hudson bay, in northern quebec; the true age of these samples is still under debate, and they may actually be closer to 3.8 billion years old. older than these rocks are crystals of the mineral zircon, which can survive the disaggregation of their parent rock and be found and dated in younger rock formations.
oldest dated rocks
section::::archaeological remains and material culture from the middle stone age levels.:still bay bifacial points.:earliest known rock drawing.





























in 2011, archeologists found small rock fragment among spear points and other excavated material. after extensive testing for seven years, it was revealed that the lines drawn on the rock were handmade and from an ochre crayon dating back 73,000 years. this makes it the oldest known rock drawing. the geometrical markings are an astonishing example of a very early creative behavior. 





























section::::archaeological remains and material culture from the middle stone age levels.:pigments and engraved pieces of ochre.
blombos cave