Volcano Line

As the Arabian plate is subducted, the Makran Ranges of southern Iran and Pakistan have been folded and piled up on the southern margin of the overriding Eurasian plate. Inland from the mountain belt is a row of volcanoes that have formed above the region where temperatures and pressures are great enough to melt the downgoing plate. The following three frames show, from east to west, the main volcanic centers related to subduction of the Arabian Plate (Indian Ocean floor segment) under the Eurasian Plate. They are far inland compared to most volcano lines above subducting plates because of the low angle of subduction.


Kuh-e-Sultan (S, 7654'), western Pakistan near the Afghanistan border, is at center of this view and an extensive sand dune field lies to the north (top left) of the volcano. Other prominent volcanic craters are labeled "C". The volcanic line continues about 100 miles farther east and is a result of subduction along the Makran coast.


 Kuh-e-Taftan (12,930') is in eastern Iran (north at upper left).


Kuh-e-Bazman (11,494') is in eastern Iran, near the southeastern edge of the Lut block. A band of prominent northwest-trending faults lies southeast of Bazman. Clouds obscure the north flank of the volcano.