#ThinSectionThursday Skeletal olivine phenocrysts 😍 🦋 in quenched, fine-grained, black magnesium-rich picrite, forming thin dykes and veins in peridotites of the Central Intrusion in Rum. This magma had around 20%MgO, and was around 1500 degrees C when intruded - MUCH hotter than normal basalt magmas. Hunterian museum specimen: http://collections.gla.ac.uk/#/details/ecatalogue/32999

Taraaa! 🎺🕺💃 First home-made thin section in Mull 🎉 This is a quartz-feldspar-biotite-garnet metasediment - it is the bedrock to our house 😊🤓 Not perfect - slight wedging at edges, but I'm very happy with this slow and arduous first home attempt. Respect 👏 to the skilled thin-section makers who mass-produce much better examples in labs over the world. #ThinSectionMonday #Geology #Metamorphic #Mull #MyHandHurts

There was a 4.8-5.3 magnitude #earthquake in Croatia, I saw some paper basket wobbling at work, but didn’t otherwise feel it https://www.emsc-csem.org/Earthquake/earthquake.php?id=1224457

Sorting sand on Ardalanish beach, Mull. Pink (garnet-rich) and black (magnetite-rich) heavy-mineral concentrations produced by natural "panning" in a wee stream on the beach. I never tire of seeing this process on beaches. 😊 😋 🥰

Great afternoon walk at Carsaig today. Tide was out so lots of shore exposed. Nice little ammonites, belemnites and gryphaea by the hundreds. Plus loads of neat dykes cutting across the shore sediments.