Sigiriya Rock What is Sigiriya Rock Made Of?


Sigiriya volcano formation

Photo: Cross section of a volcano show magma flow

Sigiriya Rock is composed of solid granite and is approximately 180 meters (590 ft) high. It is the the remains of a hardened magma plug of a long-eroded volcano. Sigiriya rock was formed over two billion years ago when this area was rife with active volcanoes. As a result, hot molten lava from the earth’s inner core spewed out onto the surface and cooled, forming numerous mountains of varying sizes.

Photo: Sigiriya rock was formed from a magma plug

Over time, volcanic activity ceased, and wind and rain slowly eroded the outer surface of the volcano, leaving only its solidified magma core. The 180 meter exposed rock is only the tip of a solidified lava shaft that extends deep into the earth’s surface.

The numerous scattered granite boulders around Sigiriya are the remnants of the lava that once flowed from this volcano.

Pidurangala Rock, less than a kilometer away from Sigiriya, was also formed by the same process.

Related Article: Sigiriya: Complete Guide