A video examining a 15–17 m-deep excavation at Apple Grove, West Virginia, argues that a lower boulder unit on the Ohio River valley bedrock records a megaflood. The video places the site 238 km downstream from the nearest mapped Lake Wisconsin ice margin and interprets Canadian Shield erratics as evidence of Laurentide meltwater released in a jökulhlaup rather than precipitation runoff. Its paleohydraulic equations give a mean flow depth of 210 ft and discharge of 212,000 m³/s (7.5 million cfs), about 11 times the greatest measured historic Ohio River flood of roughly 18,500 m³/s. 💧
Video argues Apple Grove boulders mark a 7.5 million cfs Ohio River megaflood
Site mentioned
📍 Apple Grove
Key facts
- The video examines a 15–17 m-deep excavation at Apple Grove, West Virginia, which it places about 238 km downstream from the nearest mapped Lake Wisconsin ice margin.
- It describes a lower boulder unit 0–1 m thick resting directly on the Ohio River valley bedrock; the five largest boulders have a mean intermediate axis of about 3 ft.
- The video's paleohydraulic equations estimate a mean flow depth of 210 ft and discharge of 212,000 m³/s (7.5 million cfs).
- It compares the estimate with the greatest measured historic Ohio River flood of about 18,500 m³/s, roughly 11 times smaller.
- The video interprets Canadian Shield erratics as evidence of Laurentide meltwater transported in a jökulhlaup rather than by precipitation runoff.
- The jökulhlaup origin and calculated megaflood discharge are the presenter's interpretation; the supplied search results do not independently establish them at Apple Grove.
Sources
Flood of 1937wvencyclopedia.org
On January 28, the Ohio River at Huntington reached 69.45 feet, more than 19 feet above flood stage. It inundated most of the city's downtown ...
Apple Grove, WV River and Lake Infoweatherforyou.com
River and lake levels, including flood, flow and stage information, for locations near Apple Grove, WV. ... Ohio River at Ashland - Gauge ASHK2, 36.06 ft. No ...
Crews respond to flash flooding in Ohio and W.Va.wowktv.com
A flash flood warning for much of that area has been extended until 11 AM Thursday, September 10, 2026. Despite the rain tapering off, it will ...
Apple Grove, WV Flood Map and Climate Risk Reportfirststreet.org
The city of Apple Grove has major risk from flooding. There are 49 properties in Apple Grove at risk of flooding over the next 30 years. This represents 31.4% ...
West Virginia officials confirm three dead, multiple missing ...wtrf.com
three people are dead and multiple others remain unaccounted for after 2.5 to 4 inches of rain fell in under 30 minutes around 8 p.m. Saturday.
NOVA | Teachers | Mystery of the Megafloodpbs.org
Catastrophically, the ice dam ruptured and the greatest flood in recorded geological history began. Water rushed from the ice dam westward at 40 cubic ...
Outburst flooden.wikipedia.org
In geomorphology, an outburst flood—a type of megaflood—is a high-magnitude, low-frequency catastrophic flood involving the sudden release of a large ...
The mystery of the megafloodcreation.com
Excellent animation recreates the action of super-cooled water under pressure which undermined the ice dam, causing dam failure and the ...
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