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During our second morning in Chernobyl's exclusion zone we explored one of the abandoned kolkhoz collective villages: Zymovyshche / Зимовище.
Gypsum from the Quaternary of Oklahoma, USA.
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 6000 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
The sulfate minerals all have one or more sulfate anions (SO4 -2).
Gypsum is a moderately common hydrous calcium sulfate mineral (CaSO4·2H2O). Gypsum has a nonmetallic luster, is usually clearish to whitish, is soft (H≡2), and rather fragile/brittle. Gypsum has 3 cleavage planes, one of which is well developed (“one good cleavage), and the other two are not well developed (“two poor cleavages”). Broken gypsum specimens are frequently thin plates - the consequence of the one good cleavage plane. Unbroken crystals show monoclinic symmetry.
Gypsum has economic value as a mineral. It is the starting ingredient for making plaster and wallboard.
The specimen shown above is an polycrystalline mass of intergrown gypsum crystals from Oklahoma. Many refer to such things as "selenite", which is an unnecessary junior synonym of gypsum. Selenite differs in no way from gypsum. Selenite is gypsum. Use of the term "selenite" should be discouraged.
This Oklahoma gypsum formed by evaporation of rising groundwater that is rich in dissolved minerals ultimately derived from dissolution of ancient evaporite rocks. Sediments through which the groundwater percolated have become incorporated in the gypsum (click on the photo to zoom in and look around).
Locality: unrecorded/undisclosed site at Great Salt Plains, northwestern Oklahoma, USA
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See site-specific info. at:
www.fws.gov/refuge/Salt_Plains/about/selenite.html
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Photo gallery of gypsum:
Πομπή φαντασμάτων ανόμoια όντα και άλογα αφηνιασμένα περνούν απέξω, και φοβούνται οι περισσότεροι ζώντας στα όνειρα τους πως έρχονται πως σε λίγο φτάνουν να τους πάρουν.
Το τι είχαν και τι μάζεψαν γενικότερα δεν φτάνει κι αν κουράστηκαν, θα κουραστούν περισσότερο μέχρι και να πεθάνουν αν η ώρα τους ορίσει το πότε θα γίνει τελικά.
Στο χωριό ξανά και κανείς δεν μιλάει τα μεσάνυχτα κι αν ακούσεις το οτιδήποτε άνθρωπος δεν θα είναι, μα ούτε από αυτά που ξέρουμε γενικότερα στα παραμύθια που μάθαμε μικροί.
Ο μοναδικός ήχος από το σπίτι στο κέντρο του χωριού με το βιολί να παίζει μόνο του όπως λένε, και αν κάποιος το χειραγωγεί γυναίκα θα είναι στοιχειωμένη ανάποδα κρεμασμένη.
Πάντως τα παιδιά το πρωί για το σχολείο δεν φοβούνται σαν περάσουν από εκεί, στο γυρισμό δεν μιλάνε και το βράδυ στο σπίτι παρακαλάνe για παγωτά και σοκολάτες.
Στο μπαλκόνι να ακούω το κάθετη και η δροσιά πολλά υποσχόμενη του Οκτώβρη σιωπή, με πεύκα και έλατα ακούνητα κι όλα ήσυχα βραδιάτικα να με περιτριγυρίζουν.
Μορφές που μαζεύονται λίγο πριν αποκοιμηθώ στην καρέκλα και κάπου ενδιάμεσα συναντώ τα πάντα, εκτός την γυναίκα που αγαπώ και χωρίς να φωνάζω σαν ντελάλης ακούγομαι.
Ημέρα δεύτερη η σημερινή και η πρώτη πριν από καιρό και το κορίτσι που αγαπώ, ξανά κρυμμένο να βρίσκεται στο στοιχειωμένο σπίτι και αλυσοδεμένο απ'την τρελή της μοίρα.
Έγχορδα τα όνειρα της έκαμε μαθαίνοντας απ΄την κυρά της πως να κρατά και πως να παίζει τα πάντα, που στο τέλος διπλώνονται πάνω της σαν φίδια και κατάρες της μουσικής.
Στο τέλος θα τρελαθεί που έμαθε όλα τούτα να κάνει και που δεν είναι τίποτα παραπάνω, από την συνείδηση που έχασε μικρό παιδί που ήταν όταν ονειροπολούσε διάφορα.
Όσο και να της φωνάζω λίγο πριν αποκοιμηθώ το βράδυ δεν μου απαντά παρά μόνο γυμνή κάθετε στο κρεβάτι της, και για ώρες γνέθει με το μυαλό της πράγματα και θάματα.
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Follow me my good friends!
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