Silakhor Plain ( fa, دشت سیلاخور, Dasht-e Silakhor) is the largest flat land in Lorestan province of

Iran Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmeni ...

. Located in the northeast of Lorestan, Silakhor covers most of the populated parts of

Borujerd Borujerd ( fa, بروجرد ''Borūjerd'') is a city and the capital of Borujerd County, Lorestan Province in western Iran. At the 2016 census, its population was 234,997 persons. Among the existing modern cities in Iran, Borujerd is one of the ...

Dorud Dorud ( fa, دورود, also Romanized as Dorūd, Dūrūd, and Dow Rūd) is a city in and capital of Dorud County, Lorestan Province, Iran. At the 2016 census, its population was 121,638 persons. Protests in 2017 At least 5 people were kille ...

and Azna counties. Fadak Garden and South Borujerd view

Geography

Silakhor is a

grassland A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur natur ...

plain In geography, a plain is a flat expanse of land that generally does not change much in elevation, and is primarily treeless. Plains occur as lowlands along valleys or at the base of mountains, as coastal plains, and as plateaus or uplands ...

expanded northwest to south east along with the elevated reliefs of

Zagros The Zagros Mountains ( ar, جبال زاغروس, translit=Jibal Zaghrus; fa, کوه‌های زاگرس, Kuh hā-ye Zāgros; ku, چیاکانی زاگرۆس, translit=Çiyakani Zagros; Turkish: ''Zagros Dağları''; Luri: ''Kuh hā-ye Zāgr ...

mountains. Starting 15 km north of the city of

Oshtorinan District Oshtorinan District ( fa, بخش اشترینان) is a district (bakhsh) in Borujerd County, Lorestan Province, Iran. At the 2006 census, its population was 35,368, in 9,148 families. The District has one city: Oshtorinan Oshtorinan ( fa, اش� ...

, this large geographical feature ends in south of Azna county. Silakhor is divided into two sections: Upper Silakhor and Lower Silakhor. Upper Silakhor is a smaller area located between

Oshtorinan Oshtorinan ( fa, اشترينان, ''oŝtorinān, Ashtarian,'' also Romanized as Oshtorīnān and Oshtornīān) is a town and the capital of Oshtorinan District, in Borujerd County, Lorestan Province, Iran. At the 2006 census, its population was ...

town and Borujerd city. Lower Silakhor starts from Borujerd city and after passing the town of

, it ends in south of Azna town where Oshtorankuh is located. Silakhor is an upper section of

Karun The Karun ( fa, کارون, ) is the Iranian river with the highest water flow, and its only navigable river. It is long. It rises in the Zard Kuh mountains of the Bakhtiari district in the Zagros Range, receiving many tributaries, such as t ...

River's basin. Starting from Garrin Mountain, Gelerood River passes southern footnotes of the city of Borujerd and receives more creeks in Lower Silakhor where it is called Tireh River. After joining Zaz river in Dorud, it continues toward the southern province of Khuzestan. Sezar river and then Dez River are other names for this river.

Geology

Geology of Silakhor is important as this plain is a border of Zagros and Central Iran tectonic plates. The west wing of Silakhor is the first row of Zagros known as

Elevated Zagros An elevated railway or elevated train (also known as an el train for short) is a rapid transit railway with the tracks above street level on a viaduct or other elevated structure (usually constructed from steel, cast iron, concrete, or bricks ...

which contains the highest picks of Zagros. From northwest to southeast, Silakhor plain is neighboring

Garrin Mountain Garrin Mountain, or ''Kuh-e Garin'', is a vast high-elevated mountain of the Zagros Mountains, located in Hamedan Province and Lorestan Province of western Iran. Garrin is limited to Borujerd from the east, to Alashtar from the west, and to ...

, Mount Sekuzan, Mount Mishparvar, Mount Shahneshin and

Oshtorankuh Oshtorankuh ( fa, اشترانکوه) is a mountain that is located in city of Azna, in Lorestan. With an elevation of 4150 metres, the Oshtorankuh is the highest mountain in Lorestan Province. Stretched in a northwest-southeast direction, the O ...

. Heading east, Silakhor Plain reaches Inner Highlands of the Zagros Mountains also known as Sanandej - Sirjan Zone.

Earthquakes

Being the marginal junction of Elevated Zagros and the Inner Highlands, Silakhor is an active earthquake zone. The Trans-Zagros Fault has caused several heavy earthquakes there. Between 6,000–8,000 fatalities were caused by the 7.3 Borujerd earthquake that occurred south of Borujerd on January 23, 1909. Later, the 6.1 Borujerd earthquake occurred on March 31, 2006.

References

{{coord missing, Lorestan Province Plains of Iran Landforms of Lorestan Province