Karkas mountain chain or Karkas (Persian رشته كوه كركس Reshteh kuh-e Karkas) is located in Central Iran. Persia or Persian most often refer to: Persia The Persians, an ethnic group, also called Tajiks Persian language Persian (Pokémon) See also Iranian, Iranian peoples, Iranian languages and Aryan. ...

It ranges from Kashan to Ardestan over more than 100 km and is mainly composed of igneous (plutonic and volcanic), pyroclastic and somewhat sedimentary Tertiary rocks. In the central part, this mountain chain consists of a Precambrian-Paleozoic basement. Tabatabaei House, early 1800s, Iran. ... Igneous rocks are formed when molten rock (magma) cools and solidifies, with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. ... Pyroclastic rocks are formed from lavas which are ejected into the air, as occur in pyroclastic flows or Plinian eruptions. ...