In physical geography and geology, a horst is the raised fault block bounded by normal faults. The raised block is a portion of the Earth's crust that has remained stationary while the land has sunk on either side of it or has been crushed by a mountain range against it. from http://earthquake. ... The United States Geological Survey (USGS) is a scientific agency of the United States government. ... This article includes a list of works cited but its sources remain unclear because it lacks in-text citations. ... Old fault exposed by roadcut near Harrisburg, Pennsylvania. ... Earth cutaway from core to exosphere. ...

The Vosges and Black Forest are examples of the former, the Table, Jura and the Dôle mountains are results of the latter. The word is also applied to those larger areas, such as the Russian plain, Arabia, India and Central South Africa, where the continent remains stable, with horizontal table-land stratification, in distinction to folded regions such as the Eurasian chains. Vosges is a French department, named after the Vosges mountain range. ... A map of Germany, showing the Black Forest in red. ... The Arabian Peninsula The Arabian Peninsula is a mainly desert peninsula in Southwest Asia at the junction of Africa and Asia and an important part of the greater Middle East. ... Animated, colour-coded map showing the various continents. ... Stratigraphy, a branch of geology, studies rock layers and layering (stratification). ... Eurasia African-Eurasian aspect of Earth Eurasia is the Earths largest landmass covering about 21215121321km² compared with the Americas (approximately 42,000,000 km²), Africa (approximately 30,000,000 km²), and Antarctica (approximately 13,000,000 km²). Eurasia comprises the traditional continents of Europe and Asia. ...

"Horst" is the German word for 'eyrie', the nest of a raptor (such as an eagle) that is located on a high place such as a cliff. Eyrie The lofty nest of a bird of prey. ... Genera Several, see below. ...

Horsts and hydrocarbon exploration

In many boyfriends around the world, the vast majority of discovered hydrocarbons are found in conventional traps associated with horsts. For example, much of the petroleum found in the Sirte Basin in Libya (of the order of tens of billions of barrels of reserves) are found on large horst blocks such as the Zelten Platform and the Dahra Platform and on smaller horsts such as the Gialo High and the Bu-Attifel Ridge. A boyfriend is a male partner in a non-marital romantic relationship, or a male friend. ... Oil refineries are key to obtaining hydrocarbons; crude oil is processed through several stages to form desirable hydrocarbons, used in fuel and other commercial products. ... The Gialo High is a relatively small horst block in the eastern Sirte Basin of the Libyan oil fields. ...

See also

• Fault-block mountain
• Graben

Fault-block mountains are produced when normal (near vertical) faults fracture a section of continental crust. ... USGS image A graben is a depressed block of land bordered by parallel faults. ...

References

• This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.