So we know there are geodes big enough for people to crawl inside... but what about larger, and larger still?* This site http://www.unique-almeria.com/what-is-a-geode.html actually calls this cave a geode.
It boggles the mind...
Mike H.
So we know there are geodes big enough for people to crawl inside... but what about larger, and larger still?* This site http://www.unique-almeria.com/what-is-a-geode.html actually calls this cave a geode.
* How do you tell the difference between a cavity that's resonant and one that's not?The geodes look like resonant cavities to me. - Gary
New image with HII/OIII filters.So about that damn bubble... is that supposed to be a star forming, and it's just in a very low current mode right now? Or what? What is that?? o.O
I wonder if anyone has come up with an electrical method to produce selinite...flyingcloud wrote:http://www.stormchaser.ca/Caves/Naica/Naica.html
Drethon:
Wikipedia:I wonder if anyone has come up with an electrical method to produce selinite...
http://thunderbolts.info/wp/forum/phpBB3/v ... tion#p2271:All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate, CaSO4·2(H2O).
* So the selenite/gypsum crystals could have involved electrical transmutation and formed calcium from silicon and carbon and formed sulphur from 2 oxygen. Oxygen and silicon are the most abundant elements in Earth's crust.Ca_20:40 = Si+C(14+6,28+12) ... S__16:32 = O+O(8+8,16+16)
* This is contradicted by the following TPOD.How it formed - Naica lies on an ancient fault and there is an underground magma chamber below the cave. The magma heated the ground water and it became saturated with minerals, including large quantities of gypsum. The hollow space of the cave was filled with this mineral rich hot water and remained filled for about 5000,000 years. During this time, the temperature of the water remained very stable at over 50 degrees C. This allowed microscopic crystals to form and grow. Due to the perfect conditions inside, they were able to keep growing until the silver miners pumped away the ground water in order to explore deeper. They accidentally discovered the cave when they broke through back in 2000. Since the cave is no longer submerged, the crystals have stopped growing and cooler air from the mine is lowering the temperature slightly more each year.
When the Naica mine is no longer profitable, it is likely that they will just shut off the water pumps and the crystal cave would then disappear forever.
* This TPOD may be in error by claiming that the cave was initially bone dry. Other than that, it seems to be largely correct.As electric discharges pass through rock strata, they follow the path of greatest electrical conductivity. They sometimes leave extraordinary evidence of their passage in the form of Lichtenberg figures etched into soils and rocks. They are filamentary and feathery in appearance, with finely divided tendrils at their leading edges. The branching configuration results from the electric current dissipating as it travels through the material, seeking its most conductive pathway. -- The recent discovery of Giant Crystals Cave in the Naica Mine of Chihuahua, Mexico has stunned scientists. The cave is filled with mineral deposits of enormous size, as well as with delicate flowers and wisps of crystal so fine that a breath will shatter them. -- The crystalline shapes are formed out of semiconductor materials: selenite, calcium carbonate, silicon dioxide and lead sulfides. The crystal matrix shown above is an example of the "spray" that might have been created when a powerful electric current exploded out of the rock face into a void beneath the surface. -- The nuclei of charged particles could have been carried along with the current flow and either ionized by the passage of electricity, or forced out of solution within the solid medium. The filaments of energy flew out of a central point and then crossed empty air seeking the path of least resistance, whereupon they continued into the stone, impacting at multiple locations. Wherever the electric arcs passed they left behind consolidated crystals condensed along their interior trackways. -- One significant aspect to Giant Crystals Cave is that it is bone dry, with little evidence to imply that it was melted out of the rock by flowing water. Coupled with the lack of moisture, we find nothing in traditional scientific theory that explains how water causes the precipitation of 12-meter crystals along all orthogonal axes.
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