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Cuevas del Drach Martel -Pioneer of cave exploration. The Caves of Drach (modern Catalan spelling: Coves del Drac [ˈkɔβəz ðəl ˈdɾak]; Spanish: Cuevas del Drach; lit. ' Dragon caves ') are four great caves that are located in the island of Majorca, Balearic Islands, Spain, [1] extending to a depth of 25 m and reaching approximately 4 km in length. [1]
Deposits near the source vent consist of large volcanic blocks and bombs, with so-called "bread-crust bombs" being especially common. These deeply cracked volcanic chunks form when the exterior of ejected lava cools quickly into a glassy or fine-grained shell, but the inside continues to cool and vesiculate. The center of the fragment expands ...
Interior of the Dragon's Den Dragon in its den at the foot of the Wawel Hill (Cosmographia universalis, 1544) Statue of the dragon. Smocza Jama (Polish for "dragon's den") is a limestone cave in the Wawel Hill in Kraków.
The conversion of sulfur dioxide to sulfuric acid, which condenses rapidly in the stratosphere to form fine sulfate aerosols. A volcanic winter is a reduction in global temperatures caused by droplets of sulfuric acid obscuring the Sun and raising Earth's albedo (increasing the reflection of solar radiation) after a large, sulfur-rich, particularly explosive volcanic eruption.
Augustine Volcano (Alaska) during its eruptive phase on January 24, 2006. A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
In about 40,000 years the star Gliese 445 (AC +79 3888) and the Sun will fly past each other at a distance of 3.45 light-years, after being currently 17.6 light-years from each other, [8] with Voyager 1 coming as close as 1.6 light-years to Gliese 445 at that time. [5] [9]
The core of the Sun is considered to extend from the center to about 0.2 of the solar radius (139,000 km; 86,000 mi). [1] It is the hottest part of the Sun and of the Solar System . It has a density of 150,000 kg/m 3 (150 g/cm 3 ) at the center, and a temperature of 15 million kelvins (15 million degrees Celsius; 27 million degrees Fahrenheit).
When the magma encounters water, seawater, lake water or groundwater, it can be rapidly fragmented. The rapid expansion of gases is the driving mechanism of most explosive volcanic eruptions. However, a significant portion of volcanic gas release occurs during quasi-continuous quiescent phases of active volcanism.