Sunday, November 23, 2008

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internal processes that create continental and submarine relief









CONTINENTAL DRIFT

I believe that the continents were formed Due to the movement of tectonic plates over the years and were masses of which were low and water but to be in constant crash were driving up flowing to the sea and creating large masses thus creating loscontinentes ROCs or the beginning of them.

explanatory theories for the creation of continental masses are saying that it is the mainland or what the land would contain dense materialesmenos rise and form the crust, this theory is proposed by a geologist Alfred Lothar and German meteorologist.

so Giving explanation to the creation of a large mass Pangea continrntal the culture was like a giant island surrounded by sea, after the time and the different movements within the earth began to separate creating two continents Laurasia and Godwna, mene these daroian way back to the current 5 continents which were formed over 135 million years. This Wergner Teri said.

What may have happened is that efectivammente acomulandose underwater landmasses were brought up that emerge punti comemnzo collided and where the elevation of tierray q rocks rocks found in the deep ocean are younger than the mountains of the earth's crust.
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PLATE TECTONICS



is the Ministry of the combination of tectonic and magmatic processes which cause moviimento of lithosphere plates so the change shape of the reliefs found on continents and different elevacones in the lithosphere.

This process is explained as the theory of tectonic plates colliding against each other and Due to its shape, density and generates composite elements that impact a LaOtra from sinking and it is creating Ensim so the elections and because of this also tremors.

The way to disinter lithosphere tectonic plates which make it up as a tectonic layer which are:


* American * coconut
Caribbean
* * * From the Pacific
born or Easter * South American *

Eurasian

* * African Arabian

* Philippine * Indo-Australian Antarctic
*

The tectonic plates are bounded by an ocean floor, and the so-called subduction zones, where small gaps are formed and the molten material escapes favoring the volcanism.
This theory could be defined as devido very true that many factors have proven this theory devido.

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Seismicity

The seismicity is the study of all the features present inthe earthquake approaches, means that it is the analysis of this event and as happens in many also the amount of energy released, measured as magnitude.
tectonism: A set of internal forces that change the land relief, the which is divided into: diastrophism and volcanism.

earth tremors or earthquakes are the result of geologic processes, earthquakes are tectonic or volcanic origin, but unfortunately the actions of human er can also create one.

Simologia: The branch of geophysics that studies earthquakes or earthquakes, it involves the observation of natural ground vibrations and seismic signals created artificially.
The parts of the folds are
Anticline or * top: highest part.
* Siclinal or chasm, deeper region.
* Map tilt or axial intermediate part.


the folds are caused by:
* Contraction: Encgimiento from the Earth to cool
* Continental drift: Clash of two tectonic plates
* expansion: The ridges are found in the seafloor, are formed by upward movement of mantle convection, so that folding occurs in the oceanic crust.



terrestrial tremors genre by earth movements and between their parties and causes are:
epicenter: Place where seismic waves propagate in all directions, reaching the earth's crust.

* soil liquefaction: This is a seismic hazard, where there are buildings on land that has been filled, as they may lose the consistency and look quicksand when subjected wings shock waves of an earthquake.

* Epifoco or epicenter: A place where the earthquake was perceived with greater intensity and apartir which seismic waves propagate to the surface.


types of seismic waves:
P-waves (primary, longitudinal or pressure) can pass through liquids (more speed), solid and gas, they produce earthquakes sweeps.
-Wave L: (long and shallow), are slow and undulating.
S-waves (transverse or secondary sway), produce earthquakes trepilatorios, do not pass through liquids.

Seismograph: or measuring instrument which records seismic waves on a seismogram., This device provides data regarding the direction of wave propagation speed sismicasy, it registers P waves, L and S. Earthquakes spread through seismic waves, which speed depends on the density and elasticity of the rocks of the affected area.

intensive seismic scales:
* Richter: It measures the energy released at the focus of an earthquake with values \u200b\u200bof 1-9.
* Mercalli: Efectosc of an earthquake and damage values \u200b\u200bI and XII.

tremor types are:
* Espirogenicos: Your movement is vertical and his forces are forming continents and Nippur to subsidence that give the oceans.


* orogenic: trainers are movements mountains, are fast and forces horizontally. Agree with the elasticity of rocks, understanding and can withstand stress may form folds or faults.
* Tsunami: Are earthquakes that occur in the seabed, they cause vertical movement of large bodies of water, which form Call Ringtone devastating tsunami seismic waves.


and their classification is:

Macros: Earthquakes of great magnitude, and very well-known consequences.
Micro: very weak tremors.
And these are as follows:
-oscillatory:
-Trepilatorios horizontal movement, vertical movement.

seismic zones:
* aseismic: No tremors occur.
* Penisísmica: occasionally occur.
* Seismic: Always there are tremors

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