What is a pressure ridge?

The pressure comb is a term for protruding formation made of ice or lava. When such a ridge is formed on the ice, it is usually the result of fluctuating temperatures on the surface of the lake or in the case of the ocean of sea ice. Pressure combs composed of lava are generally formed after the upper layer of stiff lava is pushed up by the molten lava below. These events may be interesting for glaciologists who study natural ice or volcanologists who study volcanoes and lava as well as the resulting formations. If the surface of the frozen water is repeatedly melted and cooled, it will cause contraction and expansion and, as a result, a crack may occur. At extremely low temperatures, it is possible that the LED tightening further and causing gaps between these cracks. These cracks are sometimes filled with water, which also freezes. If the temperature rises later, this LED will be expanded and pushed out of the crack, causing a protruding comb which can expand to 10 feet (about 3 meters) or more.

The pressure combs made of ice should not be confused with the occurrence of ice with debris. The LED network is a grouping of fragmented ice, which covers a much larger area of ​​the frozen surface. It is also much lower height than a pressure ridge.

When the lava flows, it is possible to create a pressure comb, which can also be referred to as tumulus. This may happen when the farthest surface of the lava becomes hard and the still molten lava begins to push against it from below. As a result, there may be increased piles of solidified lava, which turn into height and length.

Small attachments may occur as a result of the lava comb and as inflationary caves are usually identified. This is not common, but it can occur when the lava solidifies with a hollow inner section. The interior of these small caves usually becomes hollow when the outer surface solidifies and molten lava, which caused a pressure comb to occur, finds a way to escape.