Geology is the Way – The blog about all things geologic!

Tsunami evacuation tower sign

Living in the tsunami hazard zone

mistery rock - jointed dike

Mistery rock – Tessellated pavement stone at Changgyeonggung (Seoul, Korea)

Questione di chimica: i cristalli di wollastonite di Norsi (Isola d'Elba)

Joshua Tree landscape

L'origine dei paesaggi granitici di Joshua Tree (California, USA)

mafic enclaves in monzogranite

Cosa sono le 'palle nere' nel granito di Sant'Andrea (Isola d'Elba)?

alkali feldspar phenocrysts in monzogranite

Cosa sono i 'sassi bianchi' incastonati nelle rocce di Sant'Andrea (Isola d'Elba)?

Rosso Ammonitico

Il calcare Rosso Ammonitico di Sassorosso (Garfagnana)

Nottingham Castle sandstones

Il fiume che una volta attraversava Nottingham – Le arenarie di Nottingham, Regno Unito

cross bedded sandstone

L'antico deserto dell'Isola d'Elba

Come la geologia di Walnut Canyon ha plasmato questi insediamenti pre-Colombiani

Camminando su un tappeto di cristalli di calcite GIGANTI (Moriglion di Penna, Lucca)

Neves granite with dyke

Quando due magmi diversi si incontrano (Neves, Alto Adige)

Le arenarie di mare profondo di Cala del Leone (Quercianella, Livorno)

Una passeggiata geologica attorno a Kyoto: la scalinata di Fushimi Inari-taisha

Manarola

Geologia di Manarola (Cinque Terre)

Nummulite

Geologia urbana: i nummuliti fossili delle mura di Girona

Cholla Cactus Garden

Il Cholla Cactus Garden (Joshua Tree) – un giardino in mezzo al deserto

contact granite gneiss

Abbiamo un contatto! Quando il magma incontra la roccia (Joshua Tree, California)

Castiglioncello beach

L'antico oceano nascosto sulla costa di Castiglioncello

La nascita di 'Geology is the way'

geologyistheway

#micromega Andalusite hornfels This is from the h

#micromega Andalusite hornfelsThis is from the highest-grade part of the Calamita Schists, very close to the Porto Azzurro intrusion. These rocks are HOT. We calculated temperatures up to 660-710 °C and demonstrated they underwent partial melting! At the microscale, the andalusite crystals are so big, it is difficult to fit them in one shot! They float in a matrix of biotite, quartz, and feldspars (feldspars form due to the muscovite-out reaction and crystallization from partial melt).If you are curious, this is the link to the paper: https://doi.org/10.1016/j.lithos.2019.105230And don't forget to ➡️ swipe ⛏[1] meso🔬 [2] CPL | NX[3] PPL | N//[4] CPL | NX[5] PPL | N//⇔ 3 mm⛏ Calamita Schists🧭 Punta Bianca, Calamita, Island of Elba#andalusite #biotite #biotitemica #hornfels #metamorphism #contactmetamorphism #contactaureole #outcrop #thinsection #petrography #petrology #geology #geologia #geologie #geologyistheway #geologyporn #geologyrocks #geologylife #partialmelting #migmatite #science #nature #elba #calamita

Hey you! Are you tired of looking at rocks in the

Hey you! Are you tired of looking at rocks in the field without seeing the thin section? Are you looking at the thin section and would like to see the original rock?Let me introduce you my #micromega series! I will show you how rocks look like in the field and under the microscope. All sampled by myself!Cordierite schistAlso known as 'spotted schist' is a rock that commonly forms in contact aureoles, in metamorphosed pelites. Blasts (spots) of cordierite grow due to the high temperatures related to magma intrusion, but then they are quickly replaced by mixtures of phyllosilicates during subsequent cooling (i.e. because cordierite is very prone to alteration). The spots of cordierite look like little balls of mess in thin section. The other stuff around it is white mica (high interference colors), biotite (browns), quartz and feldspars (first-order grays).➡️ Swipe for more⛏[1] meso ⇔ 6-7 cm🔬 [2] CPL | NX [3] PPL | N//⇔ 2.5 mm⛏ Spotted schists (Acquadolce schists)🕑 Cretaceous-Oligocene🧭 Terranera, Island of Elba, Italy#cordierite #spottedschist #spottedslate #contactmetamorphism #hornfels #metamorphism #schist #intrusion #magma #petrography #thinsection #microscopy #amateurmicroscopy #microscope #geology #geologyistheway #geologyporn #geologystudent #geologyeverywhere #rocks #elba #terranera #portoazzurro

Today I feel blue. Glaucophane-rich layer in a bl

Today I feel blue.Glaucophane-rich layer in a blueschist from the Sanbagawa metamorphic belt of Japan. Glaucophane is a type of amphibole that forms along high-pressure/low-temperature metamorphic gradients. Hence, it is typically found in subducted rocks.🔬 [1] PPL | N//[2] CPL | NX ⇔ 2.5 mm⛏ Sanbagawa belt🕑 Cretaceous🧭 Shikoku, Japan#glaucophane #blueschist #metamorphicrock #metamorphism #schist #thinsection #petrography #petrology #subduction #blue #lavenderblue #microscopy #microscope #amateurmicroscopy #geology #geologyrocks #geologyistheway #geologyporn #geologylife #geologyscience #geologyeverywhere #shikoku #japan #sanbagawa

Melitaea didyma, commonly known as the spotted fri

Melitaea didyma, commonly known as the spotted fritillary or red-band fritillary.Oh yes, I also like to photograph this stuff when I am on the rocks!🦋 Melitaea didyma🧭 Pisa, Italy#butterfly #butterflies #mariposa #mariposas🦋 #farfalla #insects #lepidoptera #nature #naturephotography #insectphotography #lepidopteraphotography #geologyistheway #photography #pisa #italy

Glad you asked! Here's what the taramite-bearing

Glad you asked!Here's what the taramite-bearing schist I showed yesterday looks like in the field!You can also see around some red garnets (just a few) which, unfortunately, did not show up in the thinnie!In the Sanbagawa, you normally get this stuff at the transition between amphibolite and eclogite, normally during retrograde metamorphism. The high P/T conditions allow the formation of Na, K, Ca- bearing amphiboles over the usual Ca-amphiboles (e.g. hornblende) or Na-amphiboles (glaucophane). ➡️ Swipe and enjoy!Taramite, barroisite, winchite are all sodic-calcic amphiboles that are reported from the Sanbagawa.⛏ Sanbagawa metamorphic belt🕑 Cretaceous🧭 Sarutagawa, Ehime, Shikoku, Japan© GW#taramite #barroisite #winchite #amphibole #anfibolo #schist #scisto #片岩 #metamorphism #metamorphicrock #metamorfismo #amphibolite #eclogite #sanbagawa #sanbagawametamorphicbelt #geology #geologia #geologie #geologyrocks #geologyistheway #geologyporn #geologystudent #geologylife #geologyeverywhere #nature #science #outcrop #japan #fieldwork

Basal section of zoned taramite, a rare sodic-calc

Basal section of zoned taramite, a rare sodic-calcic amphibole, from an amphibolite-facies metabasite (probably a retrogressed eclogite)🔬 ➡️ Swipe for more[1] PPL | N//[2] CPL | NX[3] CPL + λ⇔ 2.5 mm⛏ Sanbagawa belt (subduction complex)🕑 Cretaceous🧭 Shikoku, Japan 🗾#blue #green #amphibole #taramite #anfibolo #mineral #minerals #minerale #minerali #mineralien #thinsection #petrography #geology #geologyrocks #geologyporn #geologyistheway #microscope #microscopio #amateurmicroscopy #mineralphotography #geologystudent #sanbagawa #metamorphism #eclogite #amphibolite #shikoku #japan

WOW! I have found an ammon...Oh, never mind! 😂⛏ Aeolian sandstones🕑 Pleistocene (ammonites in the Pleistocene? I would have won the Nobel prize for paleontology...)🧭 Madonna delle Grazie, Island of Elba, Italy#ammonite #ammonites #ammonitefossil #fossil #fossils #fossilhunter #fossilhunters #paleontology #paleontologist #paleontologymemes #geology #geologyrocks #geologyistheway #outcrop #sandstone #madonnadellegrazie #elba #elbaisland #geologia #science #nature #naturephotography

♫ We all live in the yellow cordierite yellow co

♫ We all live in the yellow cordieriteyellow cordierite, yellow cordierite ♪Well, not exactly a submarine, but this cordierite is 'fishy' so I guess it can still swim 🤷‍♂️Cordierite is a mineral that is common in contact-metamorphic rocks. It forms in schists metamorphosed at high-temperature and low pressure. It is not born yellow, though...The structure of cordierite contains large 'channels' that allow the movement of water molecules and large cations, which means that it alters extremely easy!Cordierite transforms into 50 shades of pinite, a mixture of chlorite, sericite, oxides, and only god know what else. Pinite makes all the yellow stuff you see in the photo. The rest is muscovite (white), biotite (brown), and opaques (black). There's also some quartz around (grey at CPL).🔬 ➡️ Swipe [1] PPL | N//[2] CPL | NX ⇔ 3 mm⛏ Calamita Schists🕑 Miocene contact aureole🧭 Capoliveri, Calamita Peninsula, Elba, Italy#yellow #yellowsubmarine #mineral #cordierite #minerals #minerale #minerali #thinsection #sezionesottile #pinite #petrography #petrology #mineralporn #microphoto #microscopy #geology #geologia #geologyistheway #geologyporn #geologyrocks #elba #elbaisland

You might know 'xenophobia' but 'xenolith'? As My

You might know 'xenophobia' but 'xenolith'?As My Big Fat Greek Wedding teaches us, everything is Greek. Xeno means 'stranger' and 'lithos' rock, so here you go, a Stranger Rock.I know what you are thinking. No, this stone has not come from the Upside Down together with the Demogorgon or the Mind Flayer. It is a bit of 'extraneous' metamorphic rock (maybe even sedimentary at the beginning) that was ripped off its parent rock formation by rising magma and there it is now: trapped in granite that formed from the cooling of said magma.Not only she was taken away from her family, but the people call it a 'stranger'. How sad!These 'stranger rocks' are very useful, because, as they are cooked by magma, metamorphic minerals can grow and tell you the pressure and temperature that was reached. They can also melt in part, so they are also useful to study melt inclusions or how granites evolve by assimilating chunks of crustal rocks.⛏ Monte Capanne monzogranite🕑 Miocene🧭 Sant'Andrea, Island of Elba, Italy#xenolith #xenophobia #mybigfatgreekwedding #granite #melt #melting #metamorphism #hightemperature #strangerthings #geology #nature #science #geologyistheway #geologyrocks #geologyporn #geologyeverywhere #elba #elbaisland #santandreaelba #outcrop #geologystudent

Piemontite schist with... well, piemontite (yellow

Piemontite schist with... well, piemontite (yellow to purple at PPL, high interference colors at CPL), quartz (first-order grays at CPL), hematite and other Mn-oxides (extinct), chlorite (greyish/yellowish at CPL) and apatite.Apatite is hidden in plain sight. Can you locate it? 🙂Oh, and piemontite is chemically zoned, so its colors change across crystals. The basal section at the top-center of the pic is a great example!➡️ Swipe and enjoy🔬 [1] PPL | N// [2] CPL | NX[3] CPL + λ⇔ 2.5 mm⛏ Piemontite schist, Sanbagawa belt🕑 Cretaceous🧭 Asemigawa river, Kochi prefecture, Shikoku, Japan© GW#piemontite #schist #mineral #minerals #minerali #orange #purple #colors #thinsection #pleochroism #zoning #petrography #petrology #petrologist #sezionesottile #geology #geologyrocks #geologyporn #mineralporn #geologyistheway #metamorphism #metamorphicrock #science #nature #sanbagawa #kochi #japan

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