Red quartzite main content.
Red quartzite rock specimens from Hall of Planet Earth. AMNH/R.Mickens

Exhibition Text

The rocks in the upper part of the Huronian Supergroup are red-brown, like this quartzite specimen. The color is due to the presence of small quantities of iron oxide minerals (rust), and indicates deposition when the atmosphere contained oxygen.

AMNH collection

For Educators

Topic: Earth Science