น้ำแข็งย้อย

thumb|Icicles – the "growth rings" or banding on the icicles occurs as the water in the soil above the cliff thaws during the day and freezes during the night. An icicle is a spike of ice formed when water falling from an object freezes. == Formation and dynamics == Icicles can form during bright, sunny, but subfreezing weather, when ice or snow melted by sunlight or some other heat source (such as a poorly insulated building), refreezes as it drips off under exposed conditions. Over time continued water runoff will cause the icicle to grow. Another set of conditions is during ice storms, when