Pumice stone is a type of light-colored stone, made of laminated glass bubbles. These stones are formed from magma acid by the action of volcanic eruptions that separate materials into the air, then runs in the horizontal transport and accumulate as pyroclastic rocks. Vesicular pumice has a high ecological value, containing a large number of cells (cellular structure) due to expansion of gas bubbles in it, and generally is as loose material or fragments of volcanic breccia. While the minerals in the pumice are:
- Feldspar
- Quartz
- Obsidian
- Cristobalite
- Tridymite
How is Pumice Formed?
Pumice stones occur when the acid magma to the surface and extensive contact with the air suddenly. Foam cup with gas in it the opportunity to come out and suddenly hardened magma. Pumice fragments are generally made when a volcano terlemparkan size of pebbles to.
Pumice stones are generally found as surface melt or flow, loose parts, or fragments of volcanic breccia. Floating obsidian can also be made by heating, so the gas. Heating is carried out on obsidian from vulcano, the temperature required to transform an average 880oC obsidian pumice. Obsidian density initially decreased to 0.416 2.36 after treatment was also floating in the water.
Floating hydraulis properties. White pumice gray, reddish yellow, vesicular texture varies with the size of the hole the better with the structure oriented to each other or not skorious with holes. Sometimes the gap is filled by zeolite or calcite. These rocks are resistant to frost (frost) is not hygroscopic (water-sucking). Has the nature of introductory low heat. Compressive strength 30-20 kg/cm2. The main composition of the amorphous silicate minerals.
The types of stone that the physical structure and the formation of the same origin with pumicit pumice, volcanic cinter, and snails. While the minerals in the pumice are feldspar, quartz, obsidian, cristobalite, and tridymite.
Pumice stones occur when the acid magma to the surface and extensive contact with the air suddenly. Foam cup with gas in it the opportunity to come out and suddenly hardened magma. Pumice fragments are generally made when a volcano terlemparkan size of pebbles to.
Pumice stones are generally found as surface melt or flow, loose parts, or fragments of volcanic breccia. Floating obsidian can also be made by heating, so the gas. Heating is carried out on obsidian from vulcano, the temperature required to transform an average 880oC obsidian pumice. Obsidian density initially decreased to 0.416 2.36 after treatment was also floating in the water.
Floating hydraulis properties. White pumice gray, reddish yellow, vesicular texture varies with the size of the hole the better with the structure oriented to each other or not skorious with holes. Sometimes the gap is filled by zeolite or calcite. These rocks are resistant to frost (frost) is not hygroscopic (water-sucking). Has the nature of introductory low heat. Compressive strength 30-20 kg/cm2. The main composition of the amorphous silicate minerals.
The types of stone that the physical structure and the formation of the same origin with pumicit pumice, volcanic cinter, and snails. While the minerals in the pumice are feldspar, quartz, obsidian, cristobalite, and tridymite.
