By Mike Searle
The crash of the Indian plate into Asia is the largest recognized collision in geological heritage, and it maintains this day. the result's the Himalaya and Karakoram - one of many biggest mountain levels on the earth. The Karakoram has 1/2 the world's maximum mountains and a name as being essentially the most distant and savage levels of all. during this superbly illustrated publication, Mike Searle, a geologist on the collage of Oxford and essentially the most skilled box geologists of ourtime, offers a wealthy account of the geological forces that have been fascinated about growing those mountain levels. utilizing his own money owed of utmost climbing and study within the sector, he items jointly the geological strategies that shaped such amazing peaks.
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Extra resources for Colliding Continents : A geological exploration of the Himalaya, Karakoram, and Tibet
I had used large-scale structural mapping of the Oman Mountains at a scale of tens to hundreds of kilometres right down to micron-scale chemical differences in garnet and biotite mineral compositions to formulate my hypothesis. This was exciting! 12). After our success of peak bagging in Kulu in 1978 I was hopeful that we would be able to climb a new route up the south face. Together with my old climbing buddy Nick Groves we recruited a team of four other friends and set off for Kathmandu in the spring of 1980.
After the plate tectonic revolution and the development of new geochemical and isotopic dating techniques, geologists were looking at mountain belts in a new light. My supervisor at the Open University, Professor Ian Gass, had given me a free hand in deciding exactly what topic to work on, and so for the first few weeks, I drove around the northern mountains with John Smewing and Adrian Lewis, two post-doctoral researchers, also at the Open University. Eventually I decided that I was going to work on the structures and the metamorphic rocks along the base of the ophiolite sequence, rocks that would give us an indication of the processes operating during the emplacement of this great slab of oceanic rocks onto the Arabian continental margin.
Using my field maps and cross-sections as well as my new pressure-temperature data from the metamorphic sole, I began to formulate a model for the formation and emplacement of the Oman ophiolite. 11). In effect the Arabian continental margin was dragged down beneath the ocean as the ophiolite was thrust from the Gulf of Oman onto Arabia. Simultaneously, my colleagues from the Open University, Julian Pearce and Tony Alabaster, who were working on the volcanic rocks of the ophiolite sequence, were formulating their own model for the ophiolite.
Colliding Continents : A geological exploration of the Himalaya, Karakoram, and Tibet by Mike Searle