Uploaded November 2025 | Updated September 2026, 2 weeks ago
Here I follow up on my recent video, “River Meanders Don’t Happen in a Megaflood,” by walking through a scientific paper that includes images and seismic data that document incised valleys and meandering river systems preserved inside Cretaceous strata of Alberta’s Grand Rapids Formation. I show how stacked channel belts, floodplains, marine–to–non-marine facies transitions, and repeated sea-level cycles form a coherent, time-layered history, one that young-earth flood geology simply does not predict.
Using hundreds of cores and calibrated seismic profiles (from a petroleum study), the authors of this paper trace meandering channels that cut down, fill, and re-incise across multiple episodes. I also compare these patterns with entrenched meanders like the Goosenecks of the San Juan River, illustrating why slow uplift and base-level change—not a single chaotic cataclysm—best explain the geometry we observe.
#Chapters
00:00 – Why I’m revisiting meanders & mega-flood claims
01:20 – Entrenched meanders: the San Juan River as a modern analog
03:11 – What the study measured: cores, well logs, and calibrated seismic
06:30 – Non-marine to coastal to marine facies across a broad region
10:18 – Seismic signatures of meandering channels (stacked in time)
11:18 – Cross-section over hundreds of kilometers
12:14 – Non-marine over marine? Aggradation, progradation, and base-level change
16:10 – Borehole contrasts: valley fills vs. orderly background strata
17:31 – Why this pattern doesn’t fit flood geology—and what it does fit
Paper cited:
Maynard, James R., Howard R. Feldman, and Robert Alway. "From bars to valleys: the sedimentology and seismic geomorphology of fluvial to estuarine incised-valley fills of the Grand Rapids Formation (Lower Cretaceous), Iron River Field, Alberta, Canada." Journal of Sedimentary Research 80, no. 7 (2010): 611-638. pubs.geoscienceworld.org/sepm/jsedres/article-abstract/80/7/611/145328/From-Bars-to-Valleys-The-Sedimentology-and-Seismic
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Joel Duff (aka Dr. Duff or The Natural Historian) resources:
About: joelduff.org
Blog: thenaturalhistorian.com
Twitter: twitter.com/NaturalHistoria
Facebook: https://www.facebook.com/thenaturalhi...
Photography "Portraits of Creation:" beechnutphotography.com
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Here I follow up on my recent video, “River Meanders Don’t Happen in a Megaflood,” by walking through a scientific paper that includes images and seismic data that document incised valleys and meandering river systems preserved inside Cretaceous strata of Alberta’s Grand Rapids Formation. I show how stacked channel belts, floodplains, marine–to–non-marine facies transitions, and repeated sea-level cycles form a coherent, time-layered history, one that young-earth flood geology simply does not predict.
Using hundreds of cores and calibrated seismic profiles (from a petroleum study), the authors of this paper trace meandering channels that cut down, fill, and re-incise across multiple episodes. I also compare these patterns with entrenched meanders like the Goosenecks of the San Juan River, illustrating why slow uplift and base-level change—not a single chaotic cataclysm—best explain the geometry we observe.
#Chapters
00:00 – Why I’m revisiting meanders & mega-flood claims
01:20 – Entrenched meanders: the San Juan River as a modern analog
03:11 – What the study measured: cores, well logs, and calibrated seismic
06:30 – Non-marine to coastal to marine facies across a broad region
10:18 – Seismic signatures of meandering channels (stacked in time)
11:18 – Cross-section over hundreds of kilometers
12:14 – Non-marine over marine? Aggradation, progradation, and base-level change
16:10 – Borehole contrasts: valley fills vs. orderly background strata
17:31 – Why this pattern doesn’t fit flood geology—and what it does fit
Paper cited:
Maynard, James R., Howard R. Feldman, and Robert Alway. "From bars to valleys: the sedimentology and seismic geomorphology of fluvial to estuarine incised-valley fills of the Grand Rapids Formation (Lower Cretaceous), Iron River Field, Alberta, Canada." Journal of Sedimentary Research 80, no. 7 (2010): 611-638. pubs.geoscienceworld.org/sepm/jsedres/article-abstract/80/7/611/145328/From-Bars-to-Valleys-The-Sedimentology-and-Seismic
-------------------------------------------------------------------------------------------
Joel Duff (aka Dr. Duff or The Natural Historian) resources:
About: joelduff.org
Blog: thenaturalhistorian.com
Twitter: twitter.com/NaturalHistoria
Facebook: https://www.facebook.com/thenaturalhi...
Photography "Portraits of Creation:" beechnutphotography.com
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