Privacy Policy

 

Your Privacy
Your privacy is important to us. To superior protect your privacy we supply this notice explaining our online information practices and the choices you can make about the way your information is collected and used. To make this notice simple to find, we make it acquirable on our homepage and at each point where personally classifiable information might be requested.

Google Adsense and the DoubleClick DART Cookie
Google, as a third celebration advertisement vendor, uses cookies to serve ads on this site. The use of DART cookies by Google enables them to serve adverts to visitors that are based on their visits to this website as well as other sites on the internet.

To opt out of the DART cookies you might visit the Google ad and content network privacy policy at the following url http://www.google.com/privacy_ads.html Tracking of users through the DART cookie mechanisms are subject to Google’s own privacy policies.

Other Third Celebration ad servers or ad networks might also use cookies to track users activities on this website to degree advertisement effectiveness and other reasons that will be if in their own privacy policies, This site has no access or control over these cookies that might be used by third celebration advertisers.

Collection of Personal Information
When visiting this site, the IP address used to access the site will be logged along with the dates and times of access. This information is purely used to examine trends, manage the site, track users movement and gather broad demographic information for internal use. Most importantly, any recorded IP addresses are not linked to personally classifiable information.

Links to third celebration Websites
We have included links on this site for your use and reference. We are not responsible for the privacy policies on these websites. You should be aware that the privacy policies of these sites might differ from our own.

Changes to this Privacy Statement
The contents of this statement might be modified at any time, at our discretion.

If you have any questions regarding the privacy policy of this site then you might contact us at  nastij13@gmail.com

»»  read more

Introduction Tectonics

Tectonics

From Wikipedia, the free encyclopedia

Tectonics, (from the Greek for "builder", tekton), is a field of study within geology concerned generally with the structures within the crust of the Earth (or other planets) and particularly with the forces and movements that have operated in a region to create these structures.

Tectonics is concerned with the orogenies and tectonic development of cratons and tectonic terranes as well as the earthquake and volcanic belts which directly affect much of the global population. Tectonic studies are also important for understanding erosion patterns in geomorphology and as guides for the economic geologist searching for petroleum and metallic ores.

A subfield of tectonics that deals with tectonic phenomena in the geologically recent period is called neotectonics

Tectonic studies have application to lunar and planetary studies, whether or not those bodies have active tectonic plate systems.

Since the 1960s, plate tectonics has become by far the dominant theory to explain the origin and forces responsible for the tectonic features of the continents and ocean basins.

There are three main types of tectonic regime

• Extensional tectonics
• Thrust (Contractional) tectonics
• Strike-slip tectonics

Extensional tectonics is concerned with the structures formed, and the tectonic processes associated with, the stretching of the crust or lithosphere.

Areas of extensional tectonics are typically associated with:

• The development of continental rifts, with or without the effects of mantle upwelling
• The gravitational spreading of zones of thickened crust formed during continent-continent collision
• Tensional flexures along strike-slip faults
• On passive margins where an effective basal detachment layer is present at the upper end of a linked system

Extensional structures

The main structures formed in areas of extensional tectonics are normal faults and graben structures.

Prominent examples include:

• The East African Rift, a major continental rift system
• The Basin and Range province of western North America
• The global mid-ocean ridge system
• The Dead Sea basin formed at a releasing bend along a continental transform boundary

Thrust tectonics is concerned with the structures formed, and the tectonic processes associated with, the shortening of the crust or lithosphere.

Areas of thrust tectonics are typically associated with:

• The collision of two continents or a continent and an island arc at a destructive plate boundary
• Restraining bends on strike-slip faults
• On passive margins, balancing up-dip extension, where an effective detachment layer is present

Strike-slip tectonics is concerned with the structures formed by, and the tectonic processes associated with, zones of lateral displacement within the crust or lithosphere.

Areas of strike-slip tectonics are associated with

• Continental transform (conservative) plate boundaries
• Lateral ramps in areas of extensional or contractional tectonics accommodating lateral offsets between major extensional or thrust faults
• Zones of oblique continent-continent collision
• The deforming foreland of a zone of continent-continent collision, a process sometimes known as escape tectonics

»»  read more