Geographical Extent
The Abitibi greenstone belt is one of the world's largest Archean greenstone belts. It appears to represent a series of thrusted subterranes that exhibit similar geological, geochemical, and isotopical signatures as those formed during the evolution of paired active-arc-back-arc systems. The huge 2,707-2,696 million year old Blake River Megacaldera Complex is within the belt.
Read more about this topic: Abitibi Greenstone Belt
Famous quotes containing the words geographical and/or extent:
“Men’s private self-worlds are rather like our geographical world’s seasons, storm, and sun, deserts, oases, mountains and abysses, the endless-seeming plateaus, darkness and light, and always the sowing and the reaping.”
—Faith Baldwin (1893–1978)
“The greatest analgesic, soporific, stimulant, tranquilizer, narcotic, and to some extent even antibiotic—in short, the closest thing to a genuine panacea—known to medical science is work.”
—Thomas Szasz (b. 1920)