are these the oldest rocks?....?

Question

still researching the northern Arizona area... found this....
"Elves Chasm pluton... oldest plutonic rocks... possible 'basement' substrate... contains mafic (hornblene-biotite tonalite) and intermedieate-composition plutonic units (quartz diorite), in cluding tabular amphilbolite bodies that may be dikes... about 1.84 Ga (billion years old)."

don't understand all that yet, but I'm working on it... just want to know if there's other areas where rock older than this is found exposed?.....

Answer 1

While the Earth is estimated to be 4.5 billion years old, the oldest known rocks, from Greenland, are 3.8 billion years old. There are also rocks from Australia, Canada and Spitzbergen that are 3.7 billion years old. The reason it is difficult to find old rocks is that due to the tectonic activity of the planet Earth, rocks are constantly being recycled through the mantle.

Answer 2

Yes. On the west coast of Australia, estimated 4.5 Billion years. These are presumed to be patches of the first solidification of the Earths crust.