description Deccan Trap Escarpment Overview
The Deccan Trap Escarpment is a prominent geological formation in western India, part of the broader Deccan Traps volcanic province created by massive eruptions during the late Cretaceous period approximately 66 million years ago. Successive lava flows deposited extensive basalt layers across more than 500,000 square kilometers, and erosion of these layers produced the distinctive step-like escarpment that gives the formation its name. The escarpment exposes stacked basalt flows and is associated with the Cretaceous-Paleogene boundary, a period linked to one of Earth's major mass extinction events.
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What created the Deccan Trap Escarpment?
It formed from enormous flood-basalt eruptions that spread successive lava flows across western and central India. The main volcanic activity occurred around 66 million years ago near the end of the Cretaceous period.
Why does the Deccan Trap Escarpment have a staircase shape?
The word trap comes from a Scandinavian term associated with steps, because stacked basalt flows weather into terrace-like layers. Each visible step represents a resistant lava flow or the edge of an eroded flow sequence.
How is the Deccan Trap Escarpment related to the Western Ghats?
The Western Ghats expose thick sections of the Deccan flood-basalt province along India's western margin. At places such as Mahabaleshwar and Panchgani, horizontal basalt layers make the volcanic structure especially easy to see.
Did the Deccan eruptions happen at the same time as the dinosaur extinction?
The main Deccan eruptions overlapped the Cretaceous-Paleogene boundary, about 66 million years ago. Scientists study them alongside the Chicxulub impact because both events could have affected climate and ecosystems, although the relative contribution of each remains debated.
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