Geosciences
Magnesite ore cryptocrystalline and microcrystalline often is cataclyzed and mylonited, which gives the result in magnesite breccia. They are quite common variety. Fragments cryptocrystalline and microcrystalline magnesite, centimeter or millimeters … Read More
The world’s largest cut emerald is set to go up for auction – and is expected to fetch $1.15 million.The 57,500-carat stone, which is the size of a watermelon, is … Read More
Crater Lake, Oregon, is situated in a caldera approximately 10 kilometers (6 miles) wide and 1175 meters (more than 3800 feet) deep. This caldera formed about 7000 years ago, when … Read More
Recall that ice freezes at a specific temperature, whereas basaltic magma crystallizes over a range of at least 200°C of cooling (about 1200° to 1000°C). In a laboratory setting, Bowen … Read More
Though churning smokestacks, cud-chewing cows and gasoline-burning vehicles are contributing constantly to greenhouse gas emissions, there are also many processes that do the reverse, pulling molecules like carbon dioxide out … Read More
Wilson cycle The cyclical opening and closing of ocean basins caused by movement of the Earth’s plates. The Wilson cycle begins with a rising plume of magma and the thinning … Read More
Two new studies into the “plumbing systems” that lie under volcanoes could bring scientists closer to predicting large eruptions.International teams of researchers, led by the University of Leeds, studied the … Read More
Geophysicists from Potsdam have established a mode of action that can explain the irregular distribution of strong earthquakes at the San Andreas Fault in California. Reporting in the latest issue … Read More
Cave of the Crystals or Giant Crystal Cave is a cave connected to the Naica Mine 300 metres (980 ft) below the surface in Naica, Chihuahua, Mexico. One of the … Read More
Amethyst is a purple quartz type (SiO2) and owes its violet color to irradiation, iron impurities and, in some cases, other transition metals, and the presence of other trace elements … Read More
