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Rotring (stylized rOtring) is a manufacturer of technical drawing tools and writing implements. Established in Germany in 1928 as a fountain pen manufacturer, Rotring went on to be acquired by Newell Brands in 1998. [3] [1] The name "Rotring" directly translates to "red ring", which refers to the company's signature: a red band placed around ...
Due to this unusual composition, the lava is erupted at relatively low temperatures (approximately 500–600 °C). [4] This temperature is so low that the molten lava appears black in sunlight, rather than having the red glow common to most lavas. It is also much more fluid than silicate lavas.
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A fissure vent, also known as a volcanic fissure, eruption fissure or simply a fissure, is a linear volcanic vent through which lava erupts, usually without any explosive activity. The vent is often a few metres wide and may be many kilometres long. Fissure vents can cause large flood basalts which run first in lava channels and later in lava ...
Stream 2 was composed of black lava, and entered the other side of the Steam Distribution Corridor. Stream 3, also composed of black lavas, flowed to other areas under the reactor. The well-known "Elephant's Foot" structure is composed of two metric tons of black lava, [18] forming a multilayered structure similar to tree bark. It is said to be ...
Once a snug home for birds, this fairy turret of a cottage has been lovingly converted into a tiny but airy escape for two, with a bathroom on the first floor and a bedroom tucked up in the eaves.
The tendency of felsic lava to be cooler than mafic lava increases the viscosity difference. The silicon ion is small and highly charged, and so it has a strong tendency to coordinate with four oxygen ions, which form a tetrahedral arrangement around the much smaller silicon ion. This is called a silica tetrahedron. In a magma that is low in ...
The lava flow that created the Arnold system is also referred to as the basalt of Lava Top Butte and is related to the Horse Cave lobe which is a lava flow that created the Horse Lava Tube System. [2] The lava flows of Lava Top Butte, the Badlands, the Horse system, and the Arnold system all have a geologic age around 80,000 years old. [1]
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