Pular is a massive stratovolcano

Stratovolcano

A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...

 located in the Antofagasta Region

Antofagasta Region

The II Antofagasta Region is one of Chile's fifteen first-order administrative divisions. It comprises three provinces, Antofagasta, El Loa and Tocopilla...

 of northern Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

, about 15 km west of the border with Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

, which in this area is a straight line between the summits of Socompa

Socompa

Socompa is a large complex stratovolcano at the border of Argentina and Chile. It is best known for its large debris avalanche deposit, which is widely accepted as the best-preserved example of this type of deposit in the world, and also notable as the home of the world's most elevated known...

 volcano and Cerro del Rincón. Pular, along with Cerro Pajonales, forms a high volcanic ridge, which runs in a generally north-east to south-west direction for 12 km (7 mi) southward, following the same direction of the ridge, lies Socompa volcano. The ridge forms a drainage divide between Salar de Atacama

Salar de Atacama

Salar de Atacama is the largest salt flat in Chile. It is located south of San Pedro de Atacama, is surrounded by mountains and has no drainage outlets. To the east is enclosed by the main chain of the Andes, while to the west lies a secondary mountain range of the Andes called Cordillera de Domeyko...

 basin and Salar de Pular basin. This latter is a bowl-shaped basin enclosed on the east by Aracar

Aracar

Aracar is a large conical stratovolcano in northwestern Argentina, just east of the Chilean border. It has an uneroded summit crater about in diameter which contains a small crater lake. It is located on the edge of the Puna de Atacama, a high desert plateau east of the Atacama Desert...

 volcano.

In the Kunza language Pular means "The Eyebrow".