the oldest rocks in north america are located at northwestern canada.
the oldest rocks in north america are located at northwestern canada.
where are the oldest rocks in north america?
northwestern canada
bullet::::- bowring, s.a., and williams, i.s., 1999. priscoan (4.00–4.03 ga) orthogneisses from northwestern canada. contributions to mineralogy and petrology, v. 134, 3–16.









































bullet::::- stern, r.a., bleeker, w., 1998. age of the world's oldest rocks refined using canada's shrimp. the acasta gneiss complex, northwest territories, canada. geoscience canada, v. 25, pp. 27–31









































bullet::::- yu a., lee c-d and halliday, a. n.."lutetium-hafnium and uranium-lead systematics of early-middle archean single zircon grains", ninth annual goldschmidt conference. 2









































section::::external links.









































bullet::::- very old australian zircons with a story to tell









































bullet::::- on the acasta gneiss
oldest dated rocks
in january 2019, nasa scientists reported the discovery of the oldest known earth rock – on the moon. apollo 14 astronauts returned several rocks from the moon and later, scientists determined that a fragment from one of the rocks contained "a bit of earth from about 4 billion years ago." the rock fragment contained quartz, feldspar, and zircon, all common on the earth, but highly uncommon on the moon.









































section::::oldest rocks by category.









































section::::oldest rocks by category.:oldest terrestrial material.
oldest dated rocks