niJara, romelSic moluskebi cxovroben, Seqmnilia garemoSi arsebuli kalciumis da karbonatis ionebisagan. kalciumis karbonati wyalSi uxsnadi marilia, amitom niJara wyalSi ar ixsneba da moluskisTvis saukeTeso sacxovrebels warmoadgens.
stalagmitebi da stalaqtidebi kalciumis karbonats warmoadgens. rogorc niJaris, ise stalagmitebisa da stalaqtidebis “damzadebaSi” monawileoben kalciumisa da karbonatis ionebi. Gansxvaveba isaa, rom stalagmitebisa da stalaqtidebis Seqmnas saukuneebi sWirdeba, maSin roca moluski ramdenime TveSi qmnis Tavis niJaras.
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