Home
Creators
Search Recent Random
Posts
Search DMs Popular Hash Lookup Tags Random
Importer
Import FAQ
Register Favorites Keys Review DMs Logout
Community
Telegram ThePornDude
Home Creators Posts Import Register Favorites Logout

Banded Iron Formations (Patreon)

Published:
2022-02-20 00:29:22
Imported:
2026-06
haven't archived this post yet. have a subscription? use the importer!

Content

Banded iron formations are a unique geologic feature that formed mostly between 1.8 to 2.5 billion years ago. The alternating colors represent red rich chert/jaspilite and black hematite + magnetite. These largely formed when oxygen first began appearing on the planet en mass, which caused iron deposits to oxidize and leach into the sea, temporarily turning the sea red. The vast majority of the world's iron is produced from deposits with features like these; in Western Australia they are quite common!

Photo Credit: James St. John, Flickr, CC BY 2.0

Files

Previews only

Comments

Anonymous

HI, Still here ..size perspective please? Big enough sources possible to 'work' at last into sliced 'cabinet' size specimens? ie 'decorator pieces' like the polished wood? UBER Ugly weather UK, Lots more fossils will be eroded out of ocean cliffs! UK good for fossils

Kirk Smith

First introduced to what banded iron was in the UP of Michigan as a teen. Was up camping and hunting with my dad near Jaspers Knob. Told me what they were and mentioned they were incredibly old rock formations.