The document summarizes the discovery of the largest natural crystals ever found in two caves within a silver and zinc mine in Naica, Mexico. The selenite crystals reach lengths of 50 feet and were formed by hydrothermal fluids from magma chambers below. The caves, known as the Crystal Cave of Giants and Cave of Swords, have extremely high temperatures over 150 degrees Fahrenheit and 100% humidity, allowing humans to only remain for 6-10 minutes before risking health issues. Plans are being made to develop the caves into tourist attractions while protecting the rare crystal formations.
The largest natural crystals on Earth have been discovered in two caves within a silver and zinc mine near Naica, in Chihuahua, Mexic. More at: http://random13579.blogspot.com/
The largest natural crystals on Earth have been discovered in two caves within a silver and zinc mine near Naica, in Chihuahua, Mexic. More at: http://random13579.blogspot.com/
The largest natural crystals on Earth have been discovered in two caves within a silver and zinc mine near Naica, in Chihuahua, Mexico, according to mine officials. Reaching lengths of 50 feet, the clear, faceted crystals are composed of selenite, a crystalline form of the mineral gypsum.
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(c) Javier Trueba / Madrid Scientific Films
These slides cover all the necessary points regarding to fossilization as well as all the types of fossilization which will be beneficial for someone. Regards
A tour in Mossel Bay, South Africa, takes you back in time to the very beginnings of modern human behaviour. And it could take you to a new place in how you think about being human, and what that means for the future of our planet.
Uploaded with permission from South Magazine - http://www.youngafrica.co.za/. Originally published Winter 2015
The largest natural crystals on Earth have been discovered in two caves within a silver and zinc mine near Naica, in Chihuahua, Mexico, according to mine officials. Reaching lengths of 50 feet, the clear, faceted crystals are composed of selenite, a crystalline form of the mineral gypsum.
uploaded by http://LightHouse.blobees.com
(c) Javier Trueba / Madrid Scientific Films
These slides cover all the necessary points regarding to fossilization as well as all the types of fossilization which will be beneficial for someone. Regards
A tour in Mossel Bay, South Africa, takes you back in time to the very beginnings of modern human behaviour. And it could take you to a new place in how you think about being human, and what that means for the future of our planet.
Uploaded with permission from South Magazine - http://www.youngafrica.co.za/. Originally published Winter 2015
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2. The largest natural crystals on Earth have been discovered in two caves within a silver and zinc mine near
Naica, in Chihuahua, Mexico, according to mine officials. Reaching lengths of 50 feet, the clear, faceted
crystals are composed of selenite, a crystalline form of the mineral gypsum.
3. Largest Selenite
Crystals In The
World
The Naica Mine of Chihuahua, Mexico, is a
working mine that is known for its
extraordinary crystals. Naica is a lead, zinc
and silver mine in which large voids have
been found, containing crystals of selenite
(gypsum) as large as 4 feet in diameter and
50 feet long. The chamber holding these
crystals is known as the Crystal Cave of
Giants, and is approximately 1000 feet down
in the limestone host rock of the mine. The
crystals were formed by hydrothermal fluids
emanating from the magma chambers below.
The cavern was discovered while the miners
were drilling through the Naica fault, which
they were worried would flood the mine. The
Cave of Swords is another chamber in the
Naica Mine, containing similar large crystals.
4. In April 2000, brothers Eloy and Javier Delgado found what experts believe are the world’s largest crystals
while blasting a new tunnel 1,000 feet down in the silver and lead Naica Mine of southern Chihuahua.
Forty-year-old Eloy climbed through a small opening into a 30- by 60-foot cavern choked with immense
crystals. "It was beautiful, like light reflecting off a broken mirror," he says.
5. He said that the sight was beautiful “…like light reflecting off a broken mirror”. The translucent
crystals lie pitched atop one another, as though moonbeams suddenly took on weight and
substance. One month later, another team of Naica miners found an even larger cavern adjacent
to the first one.
6. As a professional photographer who specializes in environmentally difficult, narrow and wet canyons
worldwide, it was almost impossible to obtain clear photographs even using every trick and technique
know, because of the extreme ambient environment. These crystals are probably stable, as the
temperature in the cave is over 150 degrees Fahrenheit with 100% humidity. In other words, these
structures are enveloped in steam.
7. As a photographer used to working in dark and dangerous environments, this experience was
unique. A human can only function in this environment for six to ten minutes before severe loss of
mental functions occurs. I was so excited while photographing the crystals that I really had to
focus and concentrate intensely on getting back out the door, which was perhaps only thirty to
forty feet away.
8. "Walking into either of these caves is like stepping into a gigantic geode," said Richard D. Fisher, an
American consultant with the mining company to develop the discoveries as tourist attractions.
Fisher said that most people can endure only a few minutes in the caves due to their high
temperatures.
9. The smaller of the two caves, which is about the size of two-bedroom apartment, is 100 Fahrenheit. The
large chamber, which Fisher describes as the size of a Cathedral, is 150 F. Both are located
approximately 1200 feet below the surface.
10. The largest previously known crystals were found in the nearby Cave of the Swords, part of the same
mine system. Some of these are now on display at the Smithsonian Institution. The local government
and mine owners hope to avoid removing any of the new discoveries for museum displays or private
collections, Fisher said.
11. While the mine company is currently limiting visitation of the caves to scientific experts, mineral
hunters have destroyed locks and broken into the chambers twice since they were first opened by mining
equipment last April. One man was killed when he attempted to chop out a gigantic crystal that fell from
the ceiling and pinned him.”The heat did him in” according to Fisher.
12. "We need more onsite protection of mine caves," said geologist Carol A. Hill, co-author of the book
Cave Minerals of the World, who calls the new discoveries "by far the largest selenite crystals I have
ever heard of."
13. Hill applauds the tourism plan. "Without it, the mining company would probably destroy the caves.
Museums have enough crystals," she said. "It's important to preserve discoveries like this where they
occur."
14. The mining company plans to air-condition the caves before opening them to the public next year,
Fisher said. He adds that reducing the heat gradually will not harm the crystals.
15. Officials of the Penoles Company, which owns the mine, kept the discoveries secret out of
concern about vandalism. Not many people, however, would venture inside casually: the
temperature hovers at 150 degrees, with 100 percent humidity. A person can stay inside the cave
for only six to ten minutes before becoming disoriented.
16. These mountains are 200 million year old limestone massifs hosting networks of caves crossed by very
deep hot and mineralized thermal waters. When these waters reached the relatively colder and closer to
the surface environments they deposited much of their salt content as lead,zinc and silver .
17. Groundwater in these caves, rich with sulfur from the adjacent metal deposits, began dissolving the
limestone walls, releasing large quantities of calcium. This calcium, in turn, combined with the
sulfur to form crystals on a scale never before seen by humans.
18. In addition to 4-foot diameter crystal columns 50 feet in length, the cavern contains row upon
row of shark-tooth-shaped formations up to 3 feet high, which are set at odd angles throughout.
This crystal form of the mineral gypsum, is known as selenite, named after Selene, the Greek
goddess of the moon.
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30. When Naica's ores are no longer viable, the mine is closed and the pumping is stopped,
then the caves will be submerged - and the crystals will start growing again.
The only reason humans can get in the caves at all is because of the ongoing pumping
operations that keep them clear of water.
36. The city of Chihuahua is the state capital of the Mexican state of Chihuahua. It has a population of about
748,551. The predominant activity is light industry.The Naica Mine is located 100km to the N.E.
37. Chihuahua, Mexico is home to two hot caverns containing the largest natural crystals known to man.
"Walking into either of these caves is like stepping into a (sweltering) gigantic geode," described one
awed observer. One of the clear selenite crystals is over 50 feet long and weighs over 55 tons.
38. Naica Crystal Cave Of Giants
A forest of crystals, the largest on the Planet.
An unreal world, beyond imagination, beyond a dream.
A cave with a temperature of 50° C and 100% humidity; an
infernal place, where man can survive just a few minutes.
Still mostly unexplored.
END
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