text: This has been supported by Wilde who has pushed the date of the zircon crystals found in the metamorphosed quartzite of Mount Narryer in Western Australia , previously thought to be 4.1 â `` 4.2 Ga , to 4.404 Ga. .
simplified: The date of the zircon crystals found in the metamorphosed quartzite of Mount Narryer in Western Australia , has been pushed to 4.404 billion years . Beforehand , they were thought to be 4.1 â `` 4.2 billion years old .