Always my favourite day on #Mull: the centre three caldera. A stunning section through the microgranite, Loch Ba ring dyke (with its magma mingling) and the caldera fill. Topped off with a beautiful hike up Beinn a'Ghraig and a wee dip in the river. Geology at Leicester Catherine Greenfield

Last but not least - the spectacular rhythmically layered gabbros of centre one. Orthocumulates with cpx oikocrysts in troctolites, 'trough cross beds', pegmatitic gabbros and late-stage anorthosite veins. Fractional crystallisation in action? Geology at Leicester Catherine Greenfield

Learning the basics of physical volcanology in the field: pumice fall vs pyroclastic density current deposits and their characteristics. Slowly piecing together the fascinating eruptive history of Las Cañadas. Seven eruption unis and counting #volcanology #Tenerife Geology at Leicester

Having now worked through many of the fall, PDC and debris flow deposits of the Bandas Del Sur, today it was time to head high and see where all the real action took place up in the Las Cañadas caldera. Welded ignimbrites, cone sheets, lavas, ring dykes and more. Geology at Leicester

👏Many congratulations to Jess Berry for passing her viva! Jess’ thesis was “An integrated accessory mineral approach to understanding post-subduction magmas and mineralisation” and was based in the Colorado mineral belt, USA. Well done Dr Jess! Leicester Geography #womeninSTEM

British-Brazillian lithium collaborations in the making at the British consulate in Belo Horizonte. Followed by some brilliant fieldwork in the beautiful Araçuaí region looking at its world class #pegmatites with colleagues at the BGS and SGB. Geology at Leicester Dr Kathryn Goodenough

Syn-tectonic migmatites and granites with post tectonic granites and pegmatites... But they all make for some spectacular rocks in the field. Dr Kathryn Goodenough Geology at Leicester

Beautiful, if complex #pegmatites at Agua Santa with large spodumene crystals in the lower levels. Thanks to Lithium Ionic for a great tour of their deposits and core. Final night in Araçuaí before the long drive to Belo Horizonte to wrap the trip up. Geology at Leicester Dr Kathryn Goodenough

The best till last? #CBL's world class spodumene #pegmatite mine. And a Brazilian-UK partnership in the making perhaps? Ending at Brazil's most photographed exposure... The source of Diamantina's diamonds? Big thanks to #SGB for their help Geology at Leicester Dr Kathryn Goodenough

All sorts of compressional #tectonic features today: thrusts, shear zones with kinematic indicators and c-s fabrics, two generations of folds and cleavage along with some later normal faults and dykes. Prof Gawen Jenkin Geology at Leicester

Final full day of geology at Rhoscolyn with North Wales looking at its finest! A beautiful example of how crustal thickening occurs in fold and thrust belts. The local wildlife came to see what all the fuss was about too! Geology at Leicester Prof Gawen Jenkin

Sampling the Foyers granite with its various facies, enclaves and magmatic fractures! Marc Reichow Sam Bright

From granulite facies metamorphism to Britain's oldest undeformed sediments and a #meteorite impact deposit that is actively being researched by those at the Leicester, today's tour of Assynt offered a bit of everything. Geology at Leicester Stewart Fishwick

Another #Assynt visit over. Today was spent looking at both the opening and closure of the Iapetus ocean and all in the same view! What a place! Geology at Leicester Stewart Fishwick