Abstract:
In Myanmar, Middle Devonian coral bearing carbonate deposits are limited in Pyinnoolwin Township, Township, i.e. Padaukpin area and Pwepon area. At the generic level, most corals from the"Maymyo Formation" including Padaukpin Limestone and Pwepon Limesone are widely distributed especially in the Old World Realm. Detailed palaeoecological study indicates that the abundant rugose coral fauna from the Middle Devonian "Maymyo Formation " may have lived in a warm, shallow, well-oxygenated seas having moderate to high wave energy probably situated near the margin of the carbonate platform adjacent to the basinal deposits in tropical to temperate zone. After death they had been transported and quickly deposited in a calm water environment on the continental slope.
Comparison of the rugose coral fauna in"Maymyo Formation" with those in other countries reveals that the rugose coral assemblages of the "Maymyo Formation" do not give any indication for a biogeographic relation to Gondwana or presumed Cinmerian blocks during the Middle Devonian. These fauna are definitely of the Rhenish-Bohemian region of basic of the faunal assemblages of Shan State of the western part of Sinoburmalaya) is interpreted as a massif belonging to the Gondwana domain which was separated form Gondwana by a wide ocean made it impossible for the benthonic organisms on the both flanks to freely migrate toward the opposing continental margin.
Key words: palaeoecology, palaeogeography, rugose corals, Middle Devonian.
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