Search results
Results from the WOW.Com Content Network
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.
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 ...
The result is an irregular, branching, often foamy hollow tube of silica glass called a fulgurite. [2] Not all fulgurites are lechatelierite; the original sand must be nearly pure silica. Lechatelierite also forms as the result of high pressure shock metamorphism during meteorite impact cratering and is a common component of a type of glassy ...
The first sites in Chicago to be listed were four listed on October 15, 1966, when the National Register was created by the National Park Service: the settlement house Hull House, the Frank Lloyd Wright-designed Frederick C. Robie House, the Lorado Taft Midway Studios, and the site of First Self-Sustaining Nuclear Reaction. The NPS first ...
The Chicago community of South Shore looks different today than when Arlean Pleasant, an 83-year-old resident, was raising her children. ... Commercial real estate has beaten the stock market for ...
The building was designated a Chicago Landmark in 2000, [4] and it was added to the federal National Register of Historic Places in 2003. In 2001, the building was sold to developer Draper and Kramer who, with Booth Hansen Architects, converted it to residential use, with the first two floors dedicated to upscale office and retail space.
Add lemonade to a large mug and microwave for 30 to 60 seconds until just warmed. Add 6 ounces of hot water (just off the boil) to the mug and steep one teapigs green tea with peach for 5 minutes.