File:HUMAN INTERFERENCE AND ADAPTATION OF CRYSTALS - INTERFERENZA UMANA E ADATTAMENTO DEI CRISTALLI.jpg
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Italiano: Qui possiamo vedere una cosa strana, non così usuale da vedere. Le persone che entrano in grotta lasciano alcuni piccoli peli/capelli dai vestiti e questi possono volare liberamente nell'aria a seconda dell'umidità. Più l'umidità è alta e meno lontano i piccoli peli possono andare e ovviamente il contrario. In questa piccola stalattite (circa 5 mm) molti anni fa è volato un piccolo pelo e molti cristalli di calcite (CaCO3) lo hanno ricoperto molto lentamente, grazie allo stillicidio dell’acqua, e hanno formato questa particolare forma con molti cristalli singoli ben visibili.
Il problema dei peli nelle grotte, soprattutto nelle grotte turistiche, è sottostimato perché molta gente entra nella grotta e lascia qualcosa, molti giorni all'anno, per tanti anni. E poi per risolvere questo problema nelle grotte turistiche il proprietario deve lavare le formazioni di calcite con acqua, ma non è una buona soluzione ne per la grotta ne per la formazione di calcite. English: Here we can see a strange thing, not so usual to see. People who go in in the cave leave some hair from the clothes and these can freely fly in the air depending on the humidity. The more the humidity the less far the little hairs can go and viceversa. In this little stalactite (about 5 mm) many years ago a very small hair flew in and a lot of crystals of calcite (CaCO3) covered it very slowly, thanks to the dripping of the water, and it formed this particular shape with a lot of clearly visible single crystals. The problem of the hair in the caves, mainly in the touristic caves, is understimated because plenty of people enter in the cave and leave something, many days a year, for many years. And then to risolve this problem in the touristic caves the owner has to wash the formations of calcite with water, but it isn’t a good solution for the cave and for the formation of calcite. |
| Date | |
| Source | Own work |
| Author | Andrea Massagli |
Wind Cave, Fornovolasco, Lucca, Tuscany, Italy
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This image was uploaded as part of Wiki Science Competition 2017. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:18, 14 December 2017 | | 4,000 × 3,000 (3.16 MB) | Andrea massagli (talk | contribs) | User created page with UploadWizard |
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