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리비라텍타이트(Lybian Glass Tektite) (해외배송 가능상품)

기본 정보
상품명 리비라텍타이트(Lybian Glass Tektite)
제조사 자체제작
판매가 상담
상품코드 P0000LTM
수량 수량증가수량감소
SNS 상품홍보
SNS

개인결제창을 통한 결제 시 네이버 마일리지 적립 및 사용이 가능합니다.

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리비라텍타이트(Lybian Glass Tektite) 수량증가 수량감소 상담 (  0)
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S H O P P I N G - T I P

일반명 : Lybian Glass Tektite
발견지 : Egypt
출신지역 : 화성과 목성사이의 소행성대
떨어진 시기 : 약100만년전
리비안 텍타이트는 약 일백만년전 사하라사막에 거대한 운석이 떨어졌는데, 이 충격으로(열) 사막모래속의 수정이 녹아서 만들어진것으로 알려져 있다. 이 텍타이트가 발견되는 지역은 다른 텍타이트와 다르게 매우 좁은 지역에서 발견되고 있는데 그곳은 이집트와 리비아 접경에서 발견되어진다. (Egypt/Libya) 이 리비안 텍타이트는 약 일천년전의 사원에서 발견되는데 주로 작은 예술품 등 조각품으로 발견되고 있다. 현재는 이집트의 정부에서 반출을 금지하고 있어서 접하기가 점점어려워 질것으로 보인다.

 

Libyan Desert Glass Adventure!
Imagine thousands of square miles of pristine, undulating sand dunes towering 600 feet above the desert floor, dwarfing your Land Rover, threatening your puny human existence. These dunes are 300,000 years old. They have slipped and twisted over the desert for millennia before the first Egyptians built the smallest mud and wattle huts, let alone the pyramids. And for all that time the dunes have hidden secrets and treasures along their sinuous flanks, like precious stones sewn into the hems of twirling, gypsy scarves. Leave it to Robert Haag to lift the veils for a peek beneath.
We flew into Cairo and from there set out by road to Farafra, the last oasis. Beyond Farafra stretched something out of a movie set. We spent 12 days in the desert, 1000 kilometers beyond the last known road, navigating by satellite, like sailors on a great, sand sea. The dunes ran in straight lines for hundreds of miles -wave after wave of snaking lines of sand. In the valleys and troughs between, we found the meteorites.
Meteorites, naturally, were why I was there in the first place, thousands of miles from home and a thousand kilometers from the end of the middle of nowhere. As on many other trips to obscure and remote places of the globe, I was looking for anything forwarded from an outer-space address, but on this trip, we were specifically hunting Libyan desert glass, a particularly lovely variety of tektite.
Libyan desert glass, 29 million years ago was probably formed when an asteroid or comet hit the surface of the earth like a huge atomic bomb, unleashing enough destructive force to not only liquefy the rocks, sand and dirt at ground zero, but to splash the molten, mixed material up into the wispy outer atmospheric regions. Perhaps some escaped Earth's gravity altogether; the rest plummeted back in a rain of fire and molten glass. The crater marking the original impact site has not been discovered - no doubt it is under millions of pounds of sand. But wherever the original impact responsible for Libyan Desert Glass occurred, the results came to rest in the wilds of the Western Egyptian desert.
I had been invited on this expedition by my friend and fellow meteorite collector, Alain Canon and his son, Louis, who are French. Other members of the group included Michelle and Olivier, two free-lance writers, and Didier, a noted mineralogist and adventurer. Sam and Walli were our drivers and guides. Between them they've logged over a million miles of treacherous sand dune driving. And I mean treacherous. You've never seen any- thing like it. Out there, death sits on your shoulder like a vulture - one insignificant little accident and you're just... dead. I found out quickly that surviving the desert is in the details. We were riding in two, 4-wheel drive turbo diesel trucks. All the fuel, all the water, all the food, all the spare parts we were possibly going to need, all had to come along with us, because if we got into trouble, we couldn't just call MA to come and tow us into town. In fact, if you get in trouble out there, you're probably in the worst trouble of your life. We were carrying 150 gallons of fuel per vehicle, and 150 gallons of water, and I didn't think it would be enough.


The enigma of this glass is:
1. The amount. It is the largest known deposit of a natural silica glass, ~98% SiO2 , on Earth.
2. It's distribution. The distribution is approximately elliptical, ~130 km by ~50 km with the major axis ~NNW by SSE.
3. Physical properties. The composition and structure of the glass are consistent with a hypothesis that the glass was formed from melted desert dune sand and subsequently cooled over a period greater than 24 hours in an Earth atmosphere.
4. Fusion energy. Possibly a meteorite or comet impact, but there are no meteor craters detectable from satellite photos with a resolution of ~5m within 150 km. No Libyan Desert Glass has been found at the nearest meteorite crater, located in Libya, ~150km to the west.
5. Chemistry. The glass cannot have been fused from the local exposed sandstone.
6. Age of glass and dunes. The dune sand and dunes have been formed in a time estimated to be less than 1,000,000 years, yet the fission track dates of the glass have a mean of ~28,000,000 years.
7. Surface geology. 28,000,000 years ago some geologists estimate that the sandstone was beneath ~300m of limestone and covered with vegetation.
[From: http://www.physics.wustl.edu/motd/DCOL00/1018.html]



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