Blackhawk Landslide

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The Blackhawk landslide is a granular slide that sourced in the San Bernardino Mountains. The runout zone is approximately 3 km wide by 10 km long. The runout is particularly long compared to the drop relief. The landslide debris is over 95% marble and limestone, with localized areas of gneiss and sandstone boulders. Because of the accessibility to the landslide and the debate over the landslide mechanics of large volume slides, the Blackhawk Landslide is a common stop of geology field trips in the Mojave Desert.
Low topography indicates "Sonic Rafting".
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Wikipedia article: http://en.wikipedia.org/wiki/Landslide
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Coordinates:  34°24'35"N 116°47'9"W

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  • The area shaded in red is only a portion of the Landslide. The scarp in the mountain where the landslide originated is visible in this image, but you have to scroll-down (to the south) "10km" to find it. The "3km" wide area from the red-shaded area to that scarp is the 10 km "runout". Unbelievable, but true.
This article was last modified 8 years ago