Friday, September 26, 2008







The highest peak of the world is in the Himalayas, is called Mount Everest and is 8848 meters above sea level. The Himalayas were formed when a piece of Africa, which was separated by geological causes, was to hit southern China. The clash between Asia and the piece was what led to the ridge. The chunk that broke away from Africa and that was to hit against Asia, today corresponds to the current India and Pakistan, called the peninsula of Indo-whose name of the river Indus.




Here is a video....

Monday, September 22, 2008

Stalagmites...!


they are formed inside cuves because of the reaccion with the calcium carbonate thius reaccion only works with the limenston rocks.
Analyzing the stalagmites paleoclimatologists can get a continuous recording and high-resolution climate.

http://video.google.com/videosearch?q=stalagmites&hl=en&emb=0&aq=1&oq=stalagm#

Plate Tectonics...!




What has happened at least once, it can happen again. And happen. The movement of the plates that form the Earth's crust sliding on a film, subject to strong tensions, can not stop.

Why do not you noticed? Well, it's a very slow movement, or our vision very quickly. But the continental drift is unstoppable, as is the exit to the outside of new materials in the ocean ridges and sinking in subduction zones.

Recall that the continents are just some of the land emerged plates and, certainly in the future will change shape and position many times, as they did in the past.


PANGEA!!

Before the drift of Pangea is known that there had been previous periods of drift. Pangea had lasted only a few hundred million years and was originally formed from the union of a set of different land masses of present continents, which were in turn fragments of another supercontinente. It appears that the fracture, dispersion and meeting supercontinentes is an ongoing process.

In fact, they are not continents, but the actual ocean floor that moves and thus dragging the continents. The process continues, his and continents continue to drift, usually because of a few centimeters a year. Therefore, the current provision is not permanent.

The Atlantic Ocean is widening as Africa and America are separated, while the Pacific Ocean is being dwarfed. It also narrows the Mediterranean Sea, and ultimately disappear, because Africa is moving northward, to meet Europe.


When Pangea split into Laurasia and Gondwana, India was part of Gondwana. Later he broke and moved quickly northward to the unusually high speed of 17 cm per year, until colliding with Asia and to unite the continent. The pressure in India against Asia caused the folding of the crust and the formation of the Himalayas, a phenomenon that still continues.

It is believed that the union or suturing of land masses will be repeated again and again in the future and that all continents will meet again in a supercontinente.

Theory....

According to the theory of plate tectonics, the earth's crust is composed of at least a dozen rigid plates that move on their own. These blocks are resting on a layer of hot rock and flexible, call asthenosphere, which flows slowly like hot tar.

Geologists have not yet determined exactly as they interact with these two layers, but the most cutting-edge theories argue that the movement of the molten material thick and the asthenosphere to force the plates to move higher, sink or rise.

The basic concept of the theory of plate tectonics is simple: heat rises. The hot air rises above the cold air and warm water currents float above the cold water. The same principle applies to the hot rocks under the earth's surface: the melt of the asthenosphere, or magma, rising upward, while the cold and hardened area is sinking more and more towards the fund, within the mantle. The rock is sinking finally reaches the high temperatures of the lower asthenosphere, is heated and begins to climb again.

This continuous movement and, somewhat circular, is called convection. At the edges of the plate and in different areas of the lithosphere solid hot, molten material flows to the surface, forming new crust.

Here is a videoo!!

http://video.google.com/videosearch?q=plate+tectonics&hl=en&emb=0&aq=0&oq=plate+t#

Friday, September 12, 2008

volcanos!!

A volcano is the only conduit that puts in direct communication with the Earth's surface deep levels of the earth's crust. The word volcano was derived from the name of the mythological god Vulcan. It is the only means to observe and study the origin of magmatic lithic materials, which accounted for 80 percent of the solid crust. At the depth of the mantle, the magma under pressure rises, creating magma chamber within or below the crust. The cracks in the rocks of the crust provide an outlet for the intense pressure, and the eruption takes place. Water vapour, smoke, gases, ash and lava rocks are thrown into the atmosphere. A volcano, in essence, is a geological device, temporarily or permanently communicating between the mantle and the Earth's surface. A volcano is also a geological structure, by which emerge magma (molten rock) and gases inside a planet. The rise usually happens in episodes of violent activity called eruptions. At accumulate material drawn from the interior forms a conical structure on the surface that can reach heights few hundred metres to several kilometres. At the tube that connects the reservoir of magma or magma chamber at depth with the surface is called the chimney. This ends at the top of the volcanic edifice, which is topped by a depression or crater. Some volcanoes after suffering major eruptions, massive collapse forming depressions in their peaks exceeding kilometer in diameter. These structures are called boilers. The viscosity (fluency) from the lava thrown by volcanoes is controlled by its chemical composition. Thus, more fluid lava, or Hawaiian-type, have compositions rich in iron and magnesium and are low in silica. These out of the chimney are stored in the crater, or caldera to overflow, forming rivers of magma can flow distances of several dozen kilometers. Source of lava 10 meters high in a volcano of HawaiLas viscous lava have a high content of silica and water vapor. Given that flow poorly, forming a plug in the chimney leading to explosive eruptions, increasing the size of the crater. In extreme cases can completely destroy the building as happened during the volcanic eruption of Mount St. Helens in 1980. The lava eruption not always from a central chimney as it can make their way through openings in the flanks of the volcano. If such eruptions are ongoing can lead to what is known as cone parasite. Mount Etna has more than 200 of these parasites cones and some of them only expel gases. The latter are called fumaroles. In general volcanoes are associated with the boundaries of tectonic plates, although there are exceptions such as volcanism of hot spots or hot spots located in the interior of tectonic plates, as is the case of Hawaii Island, also Barajas theory for the origin the Canary Islands. Geologists have classified the volcanoes in three categories: a shield volcanoes, cones and ash cones compounds (also known as stratovolcanos). A volcano of paramount importance was the Paricutín in Mexico, although not large, its importance lies in what they contributed to the volcanology (1940s-50s) and that could be studied by Gerardo Murillo, "Dr. Atl" since birth until his death (his life lasting nearly a decade).



there is also Eruptions submarine In the seafloor volcanoes occur whose lava, if they reach the surface, they may form volcanic islands. These are usually of short duration in most cases, due to Isostatic balance of the lava cooled and by sea erosion.


here is a video!

http://video.google.com/videosearch?q=el+mayor+volcan+en+erupcion&hl=en&emb=0&aq=f#q=erupciones%20volcanicas&hl=en&emb=0

Thursday, September 11, 2008

the biggest wave in the world!!

I will show you one of the biggest waves in the world ... is a meteorological phenomenon very shocking!

http://video.google.com/videoplay?docid=-997374800477921567&ei=xyXJSM_YJo_SjgL5sdXLAg&q=the+biggest+wave+in+the+world&vt=lf&hl=en


I hope you enjoy as much as I did!!

Monday, September 8, 2008

Hurricane

Hurricanes are movements of heavy air mass occurring in the air and usually cause winds with speeds exceeding 100 km / h. Although often become highly destructive hurricanes are an important part of the system of atmospheric circulation, which causes the movement of heat from regions near the Ecuador towards higher latitudes.
Los huracanes se detectan por satélites y por unos especiales radares meteorológicos, desde el momento en que comienzan a formarse y por ello generalmente hay una advertencia 3 ó 4 días antes de que empiece la tormenta.
Ante la previsión de fuertes huracanes es conveniente recurrir a medidas de evacuación. De hecho, muchas de las víctimas del Huracán Andrés que ignoraron las órdenes de evacuar perdieron la vida o se dieron cuenta de que no podían hacer nada para proteger sus bienes contra la tormenta.
I'm going to show you one of the strongest hurricanes in the world!


http://video.google.com/videosearch?q=hurricane+katrina&hl=en&emb=0&aq=0&oq=hurricane+k#q=hurricane%20katrina&hl=en&emb=0&aq=0&oq=hurricane%20k&start=10