Qualla: Lake Tight https://qualla.com/lake-tight en-us © 2026 Bendyline Wed, 08 Jul 2026 02:40:06 GMT Qualla serial false Qualla support@bendyline.com yes https://qualla.com/_m/d/n/v/s/lake-tight-wp/hero-small.webp Qualla: Lake Tight https://qualla.com/lake-tight Lake Tight: Introduction https://qualla.com/lake-tight/ Photo credit Buaidh, CC BY-SA 4.0. Stand on a ridge in southern Ohio today and you are looking out over what used to be a lake bed. About a million years ago, an Ice Age glacier crept south from Canada and dammed a major river called the Teays. The dammed water backed up into a Pleistocene-era inland lake nearly the size of modern Lake Erie - 900 feet deep, perhaps 10,000 square miles in area, spilling across what is now Ohio, Kentucky, and West Virginia. The lake did not last long in geological terms. But when it finally overflowed, it carved new south-flowing drainage channels that eventually became the Ohio River. Almost everything geologically interesting about the modern eastern United States happened downstream of Lake Tight.

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Image: Buaidh | CC BY-SA 4.0

]]> Sun, 31 May 2026 00:00:00 GMT https://qualla.com/_m/d/n/v/s/lake-tight-wp/dnvs-lake-tight-intro.mp3 0:06 1 full Lake Tight: The River Before the Lake https://qualla.com/lake-tight/ Photo credit Public domain. The Teays River was the dominant drainage of the eastern interior for several million years before the Pleistocene. It rose in the Appalachian Mountains in what is now North Carolina and flowed north and west across what is now West Virginia, Kentucky, Ohio, Indiana, and Illinois...

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Image: Public domain

]]> Sun, 31 May 2026 00:00:00 GMT https://qualla.com/_m/d/n/v/s/lake-tight-wp/dnvs-lake-tight-the-river-before-the-lake.mp3 0:06 2 full Lake Tight: When the Glacier Came https://qualla.com/lake-tight/ Photo credit Geo jim, CC BY 4.0. When the Pre-Illinoian glaciation pushed south during the early Pleistocene, the advancing ice front blocked the Teays drainage. Water cannot flow uphill, so the river backed up into the spaces it could find - low ground, tributary valleys, broad basins south of the ice front. Th...

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Image: Geo jim | CC BY 4.0

]]> Sun, 31 May 2026 00:00:00 GMT https://qualla.com/_m/d/n/v/s/lake-tight-wp/dnvs-lake-tight-when-the-glacier-came.mp3 0:06 3 full Lake Tight: What the Clays Remember https://qualla.com/lake-tight/ Photo credit Brocken Inaglory, CC BY-SA 4.0. The lake left behind a distinctive sediment called the Minford Silt Member of the Teays Formation. This silt accumulated on the lake floor over centuries, preserving the lake's footprint in subtle layered deposits that geologists can still map today. Critically for dating, the si...

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Image: Brocken Inaglory | CC BY-SA 4.0

]]> Sun, 31 May 2026 00:00:00 GMT https://qualla.com/_m/d/n/v/s/lake-tight-wp/dnvs-lake-tight-what-the-clays-remember.mp3 0:06 4 full Lake Tight: The Outflow That Made the Ohio https://qualla.com/lake-tight/ Photo credit Chris Light, CC BY-SA 3.0. Lake Tight did not last forever. When the water rose high enough to find a southern outlet, it began to drain - probably catastrophically at first, then steadily over decades and centuries. The escaping water carved new southerly drainage channels across the soft sediment of the ...

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Image: Chris Light | CC BY-SA 3.0

]]> Sun, 31 May 2026 00:00:00 GMT https://qualla.com/_m/d/n/v/s/lake-tight-wp/dnvs-lake-tight-the-outflow-that-made-the-ohio.mp3 0:06 5 full