Saturday, 17 January 2015

Island Southeast Asian Geology & Volcanic Explosions

I've been trying to read as much as I can about the geological history of Southeast Asia for the book I'm working on. It's a fascinating topic: island Southeast Asia is tectonically complex and volcanically volatile in a way few regions are. There's a whole mess of plates crashing and bumping together between Malaysia and Australia, and some of the most famous and powerful eruptions in recent earth history happened in the area - Krakatoa (Indonesian: Krakatau) (1883), Tambora (1815), and Toba (c.70,000 years BP) in particular.

There are some crazy looking islands, like Sulawesi and Halmahera, that have resulted from different pieces of different plates coming together to form contiguous wholes, and there are some, like Timor, that were seabed until only a few tens of millions of years ago (in parts of Timor and New Guinea the uplift is so recent that different coral species can be identified from the exposed rocks).