Qualla: Fenambosy Chevron https://qualla.com/fenambosy-chevron en-us © 2026 Bendyline Mon, 20 Jul 2026 10:21:26 GMT Qualla serial false Qualla support@bendyline.com yes https://qualla.com/_m/k/g/x/3/fenambosy-chevron-wp/hero-small.webp Qualla: Fenambosy Chevron https://qualla.com/fenambosy-chevron Fenambosy Chevron: Introduction https://qualla.com/fenambosy-chevron/ Photo credit Diliff, Papa Lima Whiskey (edit), CC BY-SA 3.0. From the air it looks like an arrowhead the size of a small mountain, pointing inland from the sea near the southern tip of Madagascar. The Fenambosy Chevron rises some 180 meters high and sits about five kilometers from the water, one of four such wedge-shaped formations along this stretch of coast. For a few years it carried an astonishing claim on its back: that it was the high-water mark of a catastrophe, sediment flung inland by a wall of ocean tall enough to bury cities. Whether that story is true is one of the genuinely open arguments in Earth science.

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Image: Diliff, Papa Lima Whiskey (edit) | CC BY-SA 3.0

]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/k/g/x/3/fenambosy-chevron-wp/kgx3-fenambosy-chevron-intro.mp3 0:06 1 full Fenambosy Chevron: The Catastrophe Hypothesis https://qualla.com/fenambosy-chevron/ Photo credit Diliff, Papa Lima Whiskey (edit), CC BY-SA 3.0. The dramatic reading goes like this. Sometime in the last five thousand years, a comet or asteroid struck the Indian Ocean and raised a megatsunami, a wave on a scale modern humans have never witnessed. As it surged ashore on Madagascar it dredged up seafloor sediment and piled i...

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Image: Diliff, Papa Lima Whiskey (edit) | CC BY-SA 3.0

]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/k/g/x/3/fenambosy-chevron-wp/kgx3-fenambosy-chevron-the-catastrophe-hypothesis.mp3 0:06 2 full Fenambosy Chevron: The Crater in the Deep https://qualla.com/fenambosy-chevron/ Photo credit Diliff, Papa Lima Whiskey (edit), CC BY-SA 3.0. The hypothesis needed a wound to match the splash, and its proponents pointed to the Burckle Crater, a feature on the ocean floor roughly 1,500 kilometers southeast of the chevrons, deep beneath the Indian Ocean. No one has ever drilled it to confirm what it is, and that uncertai...

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Image: Diliff, Papa Lima Whiskey (edit) | CC BY-SA 3.0

]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/k/g/x/3/fenambosy-chevron-wp/kgx3-fenambosy-chevron-the-crater-in-the-deep.mp3 0:06 3 full Fenambosy Chevron: The Wind Explanation https://qualla.com/fenambosy-chevron/ Photo credit Diliff, Papa Lima Whiskey (edit), CC BY-SA 3.0. Then came the skeptics, and they were not gentle. In 2009 the geologists Jody Bourgeois and Robert Weiss published a pointed rebuttal arguing that the chevrons are not tsunami deposits at all. Their sedimentology did not match what a great wave should leave behind, the pair argue...

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Image: Diliff, Papa Lima Whiskey (edit) | CC BY-SA 3.0

]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/k/g/x/3/fenambosy-chevron-wp/kgx3-fenambosy-chevron-the-wind-explanation.mp3 0:06 4 full Fenambosy Chevron: An Argument Still Open https://qualla.com/fenambosy-chevron/ Photo credit Diliff, Papa Lima Whiskey (edit), CC BY-SA 3.0. Most Earth scientists now lean toward the wind, and the megatsunami story sits well outside the mainstream. But the Fenambosy Chevron has not surrendered all its mystery, because the deciding evidence still lies untouched. The Burckle Crater has never been sampled directly, and u...

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]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/k/g/x/3/fenambosy-chevron-wp/kgx3-fenambosy-chevron-an-argument-still-open.mp3 0:06 5 full