 The Mongol-Okhotsk Ocean also known as the Khangai-Khantey Ocean was an ancient ocean, present during the Mesozoic. Oceanic rocks from the ancient ocean floor are preserved in the Mongol-Okhotsk suture zone extending through Mongolia to the Sea of Okhotsk. Sequence of events With the formation of the supercontinent Pangea in the mid- to late-Paleozoic, the vast Panthalassa ocean dominated 70 percent of the Earth's surface. The Tethys, Mongol-Okhotsk and various small domains of early Pacific ocean crust constituted other small oceans. Paleomagnetic data collected between 1987 and 2010 suggest that the Mongol-Okhotsk oceanic crust subducted under the terranes of Mongolia in the late Jurassic or early Cretaceous. Rock formations of the Mongol-Okhotsk suture zone Most exposed rocks in the suture zone are thrusted accretionary wedges, often with ophiolites. Uranium-lead dating of basalt, dolerite gabbro as well as Silurian radiolarite gives ages constraints on the formation of the oceanic crust. Dated rocks in the Adaatsag ophiolite in the east are among the oldest at 325 million years old. See also List of ancient oceans References%DIFDELCMD < %DIFDELCMD < %%% Ancient oceans Ancient oceans Category:Geology of Russia Category:Geology of Mongol
Paleogeography of the Late Triassic to Early Jurassic with the Mongol-Okhotsk Ocean to the south of the Mongolian realm The Mongol-Okhotsk Ocean also known as the Khangai-Khantey Ocean was an ancient ocean, present during the Mesozoic. Oceanic rocks from the ancient ocean floor are preserved in the Mongol-Okhotsk suture zone extending through Mongolia to the Sea of Okhotsk. Sequence of events With the formation of the supercontinent Pangea in the mid- to late-Paleozoic, the vast Panthalassa ocean dominated 70 percent of the Earth's surface. The Tethys, Mongol-Okhotsk and various small domains of early Pacific ocean crust constituted other small oceans. Paleomagnetic data collected between 1987 and 2010 suggest that the Mongol-Okhotsk oceanic crust subducted under the terranes of Mongolia in the Late Jurassic or Early Cretaceous. Rock formations of the Mongol-Okhotsk suture zone Most exposed rocks in the suture zone are thrusted accretionary wedges, often with ophiolites. Uranium-lead dating of basalt, dolerite gabbro as well as Silurian radiolarite gives ages constraints on the formation of the oceanic crust. Dated rocks in the Adaatsag ophiolite in the east are among the oldest at 325 million years old. %DIFDELCMD < %DIFDELCMD < %%% 
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Paleogeography of the Late Triassic to Early Jurassic with the Mongol-Okhotsk Ocean to the south of the Mongolian realm
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late Jurassic or early
Late Jurassic or Early
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See also List of ancient oceans
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References
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Ancient oceans Ancient oceans Category:Geology of Russia Category:Geology of Mongol