Notices by John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿 (faithfulljohn@mastodon.scot)

Very pleased with this boulder from a beach near Bunessan. The white quartz vein cuts gently across bedding and foliation in the grey metasediment, and both are cut by the later quartz-feldspar vein with pink margins. Lovely cross-cutting relationships reveal sequence of geological events 😊🤓 #Geology #Mull #Moine #Stratigraphy #Metamorphic

Earth didn't always have an oxygen atmosphere: it appeared around half-way through our planet's history. Are these the oldest rusty-weathered rocks on Earth? #Geology #OpenAccess https://doi.org/10.1016/j.precamres.2024.107423