Fossilized Ammonite Replaced By Pyrite: Ammonites were predatory, squidlike creatures that lived inside coil-shaped shells. Pyrite forms when there is a lot of organic carbon and not much oxygen in vicinity. - 2161x2650
/r/ThingsCutInHalfPorn: Things Cut in Half - For your cut in half needs. - February 18, 2020 - 21:38
Quite literally Nature is Metal - Fossilized Ammonite Replaced By Pyrite
/r/natureismetal: Nature is Metal - Badass pictures, gifs and videos of the awesome true brutality of nature - February 15, 2020 - 01:09
Saw on another sub, Is it true things can be fossilized by metal?
/r/fossilid: Fossil Identification - Found a fossil? We probably can figure out what it is! For the paleontology lover that needs help with identification. Brachiopods, dinosaurs, mysteries; they're all welcome here! - February 14, 2020 - 21:06