List of the most popular hashtags for theme #ALEXSTREKEISEN

Top: Hand sample of a granitic mylonite. Middle: Feldspar porphyroclasts in a fine grained matrix in a granitic mylonite from Bhutan (Himalaya). PPL (plane polarized light micrograph), 2x. Bottom: Feldspar porphyroclasts in a fine grained matrix in a Mylonite from Bhutan (Himalaya). XPL (cross polarized light micrograph) ,2x Mylonite: "A fault rock which is cohesive and characterised by a well-developed schistosity resulting from tectonic reduction of grain size, and commonly containing rounded porphyroclasts and lithic fragments of similar composition to minerals in the matrix ". (definition accepted by the SCMR) #alexstrekeisen #geology #geologist #geologyrocks #thinsection #petrology #petrography #microworld #micoscope #microscopy #science #nature #minerals #rocks #crystals #crystal #crystals #science #photography #earth #geo #earthscience #mylonite #feldspar #biotite #shearzones #deformedrock

Epidotes Crystals in a altered granite. XPL (cross polarized light micrograph), 2x. #alexstrekeisen #geology #geologist #geologyrocks #thinsection #petrology #petrography #microworld #micoscope #microscopy #science #nature #minerals #rocks #crystals #crystal #crystals #science #photography #earth #geo #earthscience #epidote #granite #alteration

Folded micaschist. Garnet (small rounded Crystals), muscovite-biotite layers and staurolite (the light yellow Crystal to the right). PPL (plane polarized light micrograph). 2x. #alexstrekeisen #geology #geologist #geologyrocks #thinsection #petrology #petrography #microworld #micoscope #microscopy #science #nature #minerals #rocks #crystals #crystal #crystals #science #photography #earth #geo #earthscience #garnetmicaschist #micaschist #schist #muscovite #biotite #garnet #staurolite

Top: Yellow Chondrodite crystals (humite), green Hercyinite and calcite in a Metamorphosed Limestone Xenolith from Vesuvius (Italy). PPL (plane polarized light micrograph), 2x. Bottom: Chondrodite crystals (high interference colors) and calcite in a Metamorphosed Limestone Xenolith from Vesuvius (Italy). XPL (cross polarized light micrograph), 2x. Named in 1813 by Jacques Louis, Comte de Bournon in honor of Sir Abraham Hume, English connoisseur and collector of gems. Humite minerals are largely confined to metamorphic contact zones between carbonate rocks (limestone, dolomite and marble) and acidic or alkaline intrusions where fluorine has been introduced by metasomatic processes. #alexstrekeisen #geology #geologist #geologyrocks #thinsection #petrology #petrography #microworld #micoscope #microscopy #science #nature #minerals #rocks #crystals #crystal #crystals #science #photography #earth #geo #earthscience #xenolith #vesuvius #hyercinite #humites #chondrodite #calcite

to celebrate the Republic Day, here are three type Italian rocks. 1) top Left: Pantellerite from Pantelleria. Flattened pumice fragment, Aegirine and Aenigmatite (balck-red). PPL (plane polarized light micrograph). 2x 2) top center: deformed biotite crystal in a Tonalite from Tonale pass, Adamello Massif. XPL (cross polarized light micrograph), 2x 3) top rigth: monzonite from monzoni Massif. Orthoclase (I order gray), plagioclase (I order gray with polysynthetic twinning) and clinopyroxene (high interference colors). XPL (cross polarized light micrograph), 2x. Festa della Repubblica (Republic Day) is the Italian National Day and Republic Day, which is celebrated on 2 June each year. The day commemorates the institutional referendum held by universal suffrage in 1946, in which the Italian people were called to the polls to decide on the form of government, following the Second World War and the fall of Fascism. #alexstrekeisen #geology #geologist #geologyrocks #thinsection #petrology #petrography #microworld #micoscope #microscopy #science #nature #minerals #rocks #crystals #crystal #crystals #science #photography #earth #geo #earthscience #monzonite #pantellerite #tonalite #plagioclase #plagioclase #Orthose #biotite #aenigmatite #aegirine #republicday #2giugno

Pyroxene basal section (with 90° cleavage) and apatite inclusions. Vulsini volcanic complex, Italy. PPL (plane polarized light micrograph). 10x #alexstrekeisen #geology #geologist #geologyrocks #thinsection #petrology #petrography #microworld #micoscope #microscopy #science #nature #minerals #rocks #crystals #crystal #crystals #science #photography #earth #geo #earthscience #pyroxene #vulsini #apatite

Feldspar Porphyroclast surrounded by deformed quartz ribbon in a granitic mylonite from khumbu (Nepal). XPL (cross polarized light micrograph), 10x #alexstrekeisen #geology #geologist #geologyrocks #thinsection #petrology #petrography #microworld #micoscope #microscopy #science #nature #minerals #rocks #crystals #crystal #crystals #science #photography #earth #geo #earthscience #mylonite #deformation #deformedrock #feldspar #porphyroclasts #nepal

Twinned augite crystals in a nepheline Foidite from Cape Verde. XPL (cross polarized light micrograph), 2x #alexstrekeisen #geology #geologist #geologyrocks #thinsection #petrology #petrography #microworld #micoscope #microscopy #science #nature #minerals #rocks #crystals #crystal #crystals #science #photography #earth #geo #earthscience #augite #foidite #capeverde

Amphibole (brown) porphyroclasts embedded in a very fine-grained matrix in a ultramylonite. Italy. PPL (plane polarized light micrograph), 2x #alexstrekeisen #geology #geologist #geologyrocks #thinsection #petrology #petrography #microworld #micoscope #microscopy #science #nature #minerals #rocks #crystals #crystal #crystals #science #photography #earth #geo #earthscience #porphyroclasts #amphibole #mylonite #ultramylonite #deformedrock