Uploaded June 2026 | Updated September 2026, 2 weeks ago
A 10-kilometer-wide asteroid crater has been sitting under agriculture fields in South Korea for 42,000 years — and the stromatolites growing inside it create a real problem for young-earth flood geology. I take a close look at the Hapcheon impact site in South Korea, confirmed as a crater only in 2021 and analyzed in detail in a 2026 paper in Nature Communications Earth & Environment. Drill cores from the crater reveal melted and shattered basement rock, hundreds of feet of undisturbed lake sediment, and remarkable stromatolites bearing as many as 8,000 annual growth rings — structures that require centuries of clear, warm, stable water to form. I walk through how geologists dated the impact and the lake sediments using multiple independent methods, then ask the question young-earth creationists rarely engage with directly: how does a six-thousand-year timeline, with this crater supposedly forming at the tail end of a global flood, account for thousands of years of undisturbed stromatolite growth and hundreds of feet of slowly accumulated lake sediment?
Chapters
0:00 Introduction
0:32 A crater in Korea, not Mexico
2:21 Touring the Hapcheon impact site
6:16 Evidence of an asteroid strike
9:14 Dating the crater
15:01 What exactly is a stromatolite?
22:23 Thousands of growth rings in one structure
36:29 Can young-earth flood geology explain this?
45:08 Radiocarbon dates confirm the timeline
The research paper I cover: nature.com/articles/s43247-026-03206-7
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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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A 10-kilometer-wide asteroid crater has been sitting under agriculture fields in South Korea for 42,000 years — and the stromatolites growing inside it create a real problem for young-earth flood geology. I take a close look at the Hapcheon impact site in South Korea, confirmed as a crater only in 2021 and analyzed in detail in a 2026 paper in Nature Communications Earth & Environment. Drill cores from the crater reveal melted and shattered basement rock, hundreds of feet of undisturbed lake sediment, and remarkable stromatolites bearing as many as 8,000 annual growth rings — structures that require centuries of clear, warm, stable water to form. I walk through how geologists dated the impact and the lake sediments using multiple independent methods, then ask the question young-earth creationists rarely engage with directly: how does a six-thousand-year timeline, with this crater supposedly forming at the tail end of a global flood, account for thousands of years of undisturbed stromatolite growth and hundreds of feet of slowly accumulated lake sediment?
Chapters
0:00 Introduction
0:32 A crater in Korea, not Mexico
2:21 Touring the Hapcheon impact site
6:16 Evidence of an asteroid strike
9:14 Dating the crater
15:01 What exactly is a stromatolite?
22:23 Thousands of growth rings in one structure
36:29 Can young-earth flood geology explain this?
45:08 Radiocarbon dates confirm the timeline
The research paper I cover: nature.com/articles/s43247-026-03206-7
-------------------------------------------------------------------------------------------
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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