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Material properties (size, color, texture) of fulgurites vary widely, depending on the size of the lightning bolt and the composition and moisture content of the surface struck by lightning. Most natural fulgurites fall on a spectrum from white to black. Iron is a common impurity that can result in a deep brownish-green coloration.
Photomicrograph of shocked quartz. Shocked quartz is a form of quartz that has a microscopic structure that is different from normal quartz. Under intense pressure (but limited temperature), the crystalline structure of quartz is deformed along planes inside the crystal.
The approximate age of the fulgurite was determined using thermoluminescence (TL). [20] Quartz sands can be used to measure the amount of radiation exposure, so if the temperature at which the fulgurite was formed is known, one could determine the relative age of the mineral by examining the doses of radiation involved in the process. [3] [20]
A fulgurite from the Mauritanian desert Trinitite, in common with several similar naturally occurring minerals, is a melt glass . [ 46 ] While trinitite and materials of similar formation processes such as lavinite are anthropogenic, fulgurites , found in many thunderstorm -prone regions and in deserts , are naturally-formed, glassy materials ...
Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Specific studies within mineralogy include the processes of mineral origin and formation, classification of minerals, their geographical distribution, as ...
Since the H-1B status was created, Congress has limited the number of new H-1B visas available each year. Currently, the annual cap is 65,000 new H-1B visas and an additional 20,000 for foreign ...
The filing claims Fussner had engaged in the "planning of and preparation to carry out a terrorist attack against the United States, its citizens and their property," ultimately culminating in the ...
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