Earth's oldest rocks offer a glimpse of our planet's early history. Geologists thought this 3.75 billion year old rock was Earth's oldest when it was dated in 1973. Now another rock is the record-holder, at 4.03 billion years.
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Details
Title: Folded anorthosite
Location: Godthab District, Greenland, Denmark
Type: Rock
Rights: This image was obtained from the Smithsonian Institution. The image or its contents may be protected by international copyright laws. http://www.si.edu/termsofuse