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West Siberian Glacial Lake
 
 
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The West Siberian Glacial Lake, also known as West Siberian Lake, or Mansiyskoe Lake , was a periglacial lake formed when the Arctic Ocean
Arctic Ocean

The Arctic Ocean, located in the Northern Hemisphere and mostly in the Arctic North Pole region, is the smallest and shallowest of the world's five major oceanic divisions....
 outlets for each of the Ob
Ob River

Ob River , also Obi, is a major river in western Siberia, Russia, it is the country's fourth longest....
 and Yenisei
Yenisei River

Yenisei is the greatest river system flowing to the Arctic Ocean, and at 5,539 km is the List of rivers by length. Rising in Mongolia, it follows a northerly course to the Yenisei Gulf in the Kara Sea, draining a large part of central Siberia, the longest stream following the Yenisei-Angara-Selenga-Ider....
 rivers were blocked by the Barents-Kara Ice Sheet during the Weichselian Glaciation, approximately 80,000 years ago. At its maximum extent, the lake's surface area was more than twice that of the present-day Caspian Sea
Caspian Sea

The Caspian Sea is the largest enclosed body of water on Earth by area, variously classed as the List of lakes by area or a full-fledged sea. It has a surface area of 371,000 square kilometers and a volume of 78,200 cubic kilometers ....
.

It is theorized that while drainage to the Arctic Ocean basin (e.g.






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The West Siberian Glacial Lake, also known as West Siberian Lake, or Mansiyskoe Lake , was a periglacial lake formed when the Arctic Ocean
Arctic Ocean

The Arctic Ocean, located in the Northern Hemisphere and mostly in the Arctic North Pole region, is the smallest and shallowest of the world's five major oceanic divisions....
 outlets for each of the Ob
Ob River

Ob River , also Obi, is a major river in western Siberia, Russia, it is the country's fourth longest....
 and Yenisei
Yenisei River

Yenisei is the greatest river system flowing to the Arctic Ocean, and at 5,539 km is the List of rivers by length. Rising in Mongolia, it follows a northerly course to the Yenisei Gulf in the Kara Sea, draining a large part of central Siberia, the longest stream following the Yenisei-Angara-Selenga-Ider....
 rivers were blocked by the Barents-Kara Ice Sheet during the Weichselian Glaciation, approximately 80,000 years ago. At its maximum extent, the lake's surface area was more than twice that of the present-day Caspian Sea
Caspian Sea

The Caspian Sea is the largest enclosed body of water on Earth by area, variously classed as the List of lakes by area or a full-fledged sea. It has a surface area of 371,000 square kilometers and a volume of 78,200 cubic kilometers ....
.

It is theorized that while drainage to the Arctic Ocean basin (e.g. by the Ob
Ob

Ob may refer to:*Ob River, a river in West Siberia, Russia*Ob Sea, an artificial lake on the Ob River*Ob , a town in Novosibirsk Oblast, Russia...
 and Yenisei Rivers) was prevented, the lake would eventually overflow to the Mediterranean Sea
Mediterranean Sea

The Mediterranean Sea is a sea or Ocean off the Atlantic Ocean surrounded by the Mediterranean region and almost completely enclosed by land: on the north by Europe, on the south by Africa, and on the east by Asia....
 through a circuitous route that would include the Aral Sea
Aral Sea

The Aral Sea is a landlocked endorheic basin in Central Asia; it lies between Kazakhstan in the north and Karakalpakstan, an autonomous region of Uzbekistan, in the south....
, the Caspian Sea
Caspian Sea

The Caspian Sea is the largest enclosed body of water on Earth by area, variously classed as the List of lakes by area or a full-fledged sea. It has a surface area of 371,000 square kilometers and a volume of 78,200 cubic kilometers ....
, and the Black Sea
Black Sea

The Black Sea is an inland sea sea bounded by southeastern Europe, the Caucasus and the Anatolia and is ultimately connected to the Atlantic Ocean via the Mediterranean Sea and Aegean Seas and various straits....
. Interestingly, this would have resulted in water from the Selenga River and Lake Baikal
Lake Baikal

Lake Baikal is in southern Siberia in Russia, located between Irkutsk Oblast to the northwest and the Buryatia to the southeast, near the city of Irkutsk....
 draining over a course of some 6,000 miles, considerably longer than any river's course today.

See Mangerud et al (2004) for excellent, precise diagrams and descriptions of the lake as well as postulated drainage patterns.

See also

  • Nerpa, a freshwater seal
    Pinniped

    Pinnipeds or fin-footed mammals are a widely distributed and diverse group of semi-aquatic marine mammals comprising the families Odobenidae , Otariidae , and Phocidae ....
     of Lake Baikal
    Lake Baikal

    Lake Baikal is in southern Siberia in Russia, located between Irkutsk Oblast to the northwest and the Buryatia to the southeast, near the city of Irkutsk....
     probably related to Caspian seal
    Caspian Seal

    Caspian seals , one of the smallest members of the "true seal" family, are unique in that they are found exclusively in the brackish Caspian Sea....
    s.
  • Turgai Straits or West Siberian Sea, a Cretaceous
    Cretaceous

    The Cretaceous , usually abbreviated K for its German translation Kreide, is a geologic period from circa to million years ago . In the geologic timescale, the Cretaceous follows on the Jurassic period and is followed by the Paleogene period....
     to Eocene
    Eocene

    The Eocene Geologic time scale is a major division of the geologic timescale and the second epoch of the Palaeogene period in the Cenozoic era....
     extension of the Tethys Sea separating Europe and Asia


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