A volcano is an opening, or rupture, in a planet's surface or Crust , which allows hot, molten rock, ash, and gases to escape from below the surface.... hotspot
Hotspot (geology)
In geology, a hotspot is a location on the Earth's surface that has experienced active volcano for a long period of time. J. Tuzo Wilson came up with the idea in 1963 that volcanic chains like the Hawaiian Islands result from the slow movement of a tectonic plate across a "fixed" hot spot deep beneath the surface of the planet.... located in the southern Atlantic Ocean
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's oceanic divisions; with a total area of about 106.4 million square kilometres . It covers approximately one-fifth of the Earth's surface.... . It is responsible for the island of St. Helena and the St. Helena Seamount chain
St. Helena Seamount chain
The St. Helena Seamount chain is an underwater chain of seamounts in the southern Atlantic Ocean. The chain has been formed by the movement of the African Plate over the St. Helena hotspot.... . It is one the oldest known hotspots on Earth, which began to produce basalt
Basalt
Basalt is a common extrusive volcanic rock. It is usually gray to black and fine-grained due to rapid cooling of lava at the surface of a planet.... ic lava
Lava
Lava is molten Rock expelled by a volcano during an eruption. When first expelled from a volcanic vent, it is a liquid at temperatures from 700 ?C to 1,200 ?C .... about 145 million years ago.
