Update: 2013-01-05 03:04 PM +0630


Permian geologic period
Formation of the land of Myanmarpré


by U Kyaw Tun, et. al. based on:
#1. Wikipedia: http://en.wikipedia.org/wiki/Permian 130102
#2. Wikipedia: http://en.wikipedia.org/wiki/Permian-Triassic_extinction_event 130102
  by Naci Görür and A.M.C. Sengör in Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 122
  http://www-odp.tamu.edu/publications/122_SR/VOLUME/CHAPTERS/sr122_05.pdf 30102
#3. Wikipedia: http://en.wikipedia.org/wiki/Sedimentary_rock 130102
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The Permian is a geologic period and system which extends from 298.9 ± 0.2 to 252.2 ± 0.5 (Million years) or about 300 million-years ago. [300x106 yrs.]. Man has not appeared on Earth. Most of the life forms including the dinosaurs die at the end of the Permian period. This event is known as the Permian-Triassic Extinction. 

The world at the time was dominated by a single supercontinent known as Pangaea, surrounded by a global ocean called Panthalassa. The extensive rainforests of the Carboniferous period had disappeared, leaving behind vast regions of arid desert within the continental interior. Reptiles, who could better cope with these dryer conditions, rose to dominance in lieu of their amphibian ancestors.

An example of an amphibian disappearing in our time is the {ré-poat-þing} of the Shan State, and the small green tree frog which were very abundant when we were young. Those who would like to go more into this, see NEW COUNTRY RECORDS AND RANGE EXTENSIONS FOR MYANMAR AMPHIBIANS AND REPTILES, by G. O. U. Wogan, J.V. Vindum, J.A. Wilkinson, M.S. Koo, J.B. Slowinski, Htun Win, Thin Thin, Sai Wunna Kyi, San Lwin Oo, Kyi Soe Lwin and Awan Khwi Shein, in Hamadryad Vol. 33, No. 1, pp. 83 – 96, 2008. http://researcharchive.calacademy.org/research/Herpetology/myanmar/PDFS/Wogan%20et%20al%202008.pdf 130102

UKT: According to legend which I have cut off most of the area under Myanmarpré is carbonate and clastic sedimentary rocks. -- UKT130102


Sea levels in the Permian remained generally low. The period witnessed the diversification of the early amniotes into the ancestral groups of the mammals, turtles, lepidosaurs and archosaurs.  The Permian Period (along with the Paleozoic Era) ended with the largest mass extinction in Earth's history, in which nearly 90% of marine species and 70% of terrestrial species died out. It would take well into the Triassic for life to recover from this catastrophe.

The super continent Pangaea straddled the equator and extended toward the poles, with a corresponding effect on ocean currents in the single great ocean.

Large continental landmasses create climates with extreme variations of heat and cold ("continental climate") and monsoon conditions with highly seasonal rainfall patterns. Deserts seem to have been widespread on Pangaea. Such dry conditions favored gymnosperms (seed plants such as conifers and Ginkgo), plants with seeds enclosed in a protective cover, over plants such as ferns that disperse spores. The first modern trees (conifers, ginkgos and cycads) appeared in the Permian.

The Irrawaddy valley of present day Myanmarpré was then under water and come to have sedimentary carbonate and clastic rocks. The position of the Mount Victoria Land block (Mitchell, 1989) is unclear. Mitchell (1989) considers it tectonically in an equivalent position to India and separates it from hypothetical extension of the Lhasa block in Burma, now [{#3.p087}} hidden beneath the central Burmese lowlands, along an ophiolitic suture of middle Cretaceous age.

Since sedimentary rocks are important sources of natural resources like coal, fossil fuels, drinking water or ores, we should always remember that our motherland - Myanmarpré is one of the richest in natural resources.

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