Another one of those interesting ice discs, which have been documented several times in recent years, in such locations as England, Russia, and the northern United States is once again discovered at a
North Dakota’s River.
While George Loegering, a retired engineer according to Viral Wire, described the rare phenomenon as “an amazing wonder,”he doesn't say much else about this snow form.
As you may see, the alien-like disc measured about 50 feet in diameter is spun by a slow water current. Ice discs form on the outer bends in a river where the accelerating water creates a force called 'rotational shear', which breaks off a chunk of ice and twists it around. As the disc rotates, it grinds against surrounding ice — smoothing into a circle. It is amazing how people keep associate anything circular that appear in nature is UFOs related.
If you're after a more scientific explanation, here's the best one I find. River specialist and geography professor Joe Desloges states that ice pans are "surface slabs of ice that form in the center of a lake or creek, instead of along the water’s edge. As water cools, it releases heat that turns into frazil ice" that can cluster together into a pan-shaped formation. If an ice pan accumulates enough frazil ice and the current remains slow, the pan may transform into a 'hanging dam', a heavy block of ice with high ridges low center.
Another one...
It is believed that they form in eddy currents. Ice discs have most frequently been observed in Scandinavia and North America. An ice disc was observed in Wales in December 2008 and another was reported in England in January 2009. The earliest recordings is of a slowly revolving disc was spotted on the Mianus River and reported in a 1895 edition of Scientific American.
Sinkhole is another one of those natural wonder phenomenon in which a spot in the earth sinks, creating a gigantic moonlike crater.
Note: These sinkholes seem to commonly happen under ponds.
That's yet, here's a tune of the day, let's revisit Brit.
