Zircon rock dating - Do Zircons Contain Reliable Time Stamps and Early Earth’s.


Radiometric clocks are "set" when each rock forms. "Forms" means the moment an igneous rock solidifies from magma, a sedimentary rock layer is deposited, or a rock heated by metamorphism cools off. It's this resetting process that gives us the ability to date rocks that formed at different times in earth history.

Zircon is ubiquitous in the crust of Earth. It occurs as a common accessory mineral in igneous rocks (as primary crystallization products), in metamorphic rocks and as detrital grains in sedimentary rocks . [1] Large zircon crystals are rare. Their average size in granite rocks is about – mm, but they can also grow to sizes of several centimeters, especially in mafic pegmatites and carbonatites . [1] Zircon is also very resistant to heat and corrosion.


Zircon rock dating

Zircon rock dating