‼️New Paper
💥 #Amphibole reaction rims record shear during #magma ascent
🚨 EBSD reveals reaction rims provide an archive of pre-eruptive magma #deformation, making them valuable proxies for quantifying #shear histories and unveiling hidden forces leading to #eruption
📃 www.nature.com/articles/s41...
folded prismatic amphibole crystal
Sometimes even the most 'static' rocks show evidence of deformation. This prismatic amphibole crystal is slightly bent and crosscut by a series of cracks that appear related to the bending
⚒️ #geology #amphibole #structuralgeology
Rock-forming minerals Common minerals combine to make rocks The Earth's crust is made of over 2,000 minerals. Of these, the most abundant are feldspar, quartz, #calcite, dolomite, mica, pyroxene, #amphibole, garnet and olivine. Because they combine to make rocks, these are called 'rock-forming minerals. Feldspars are the most abundant minerals in the Earth's crust.
Rock-forming minerals
Common minerals combine to make rocks
The Earth's crust is made of over 2,000 minerals. Of these, the most abundant are feldspar, quartz, #calcite, dolomite, mica, pyroxene, #amphibole, garnet and olivine. Because
Mineral Monday!
Is it glaucophane, chloritoid, or blue-green amphibole in Dutchess Co. NY? See our other social media feeds for more. By Donna Whitney et al.
#MSACommunications #MineralMonday #thinsection
#glaucophane #chloritoid #amphibole #DutchessCounty
Retrograde eclogite imprinted with blueschist facies minerals including phengite (golden flakey mineral), actinolite (black needles), and glaucophane (blue).
Franciscan Complex, California
#eclogite #blueschist #metamorphism #geology #geoscience #glaucophane #mica #amphibole
‼️New Paper
💥CO2 flushing and #redox as drivers of pre-eruptive #amphibole breakdown
🚨We present a framework to interpret reaction rim textures and show natural rims can record simultaneous/sequential ΔP–T–X processes, shedding new light on #eruption triggers
🔗 www.sciencedirect.com/science/arti...
How low are the odds to find a basal section of #amphibole (anthophyllite, first-order yellow, left) next to a basal section of #pyroxene (enstatite, first-order grey, right)? #MineralMonday ⚒️ #geology
Orthoamphibole + olivine contact metamorphosed serpentinite
Ophelia was a #peridotite, but the evil opening of the Atlantic turned her into a #serpentinite. She wandered endlessly in the geological time until she met the #granite. The granite, moved by her story, transformed her into peridotite again but with #amphibole, to remember her hydrous past. ⚒️❤️
Tremolite crystals in serpentinite, as seen under the microscope
Happy #MineralMonday !
Tremolite fibers in thermo-metamorphosed serpentinite from Elba, Italy, FOV: 3mm, CPL
#geology #thinsection #amphibole
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Amphibole crystals showing their characteristic cleavage, two sets of regular fractures intersecting at about 60/120°
Well, you caught me staring at your cleavage.
#geology #amphibole
Photographing Brazilian Amphibole Quartz specimens for my website and it’s almost ‘2 for you, 1 for me, 1 for you, 2 for me…”
I’m trying to practise the ‘Does this bring me joy’ theory 😉
The struggle is real! 😂
#quartz #amphibole
#crystalseller #quartzspecimens
#inclusionquartz #crystals
A green to blue crystal of amphibole (taramite) in an amphibolite-facies rock from Japan as seen under the microscope.
Another nice sample from Japan... a metabasic rock with huge crystals of a sodic-calcic amphibole - probably taramite.
Sanbagawa belt
FOV: 3 mm
PPL
#geology #amphibole #minerals #petrography #thinsection
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