+DieChecker Posted May 28, 2016 #1 Share Posted May 28, 2016 I thought this was very interesting. https://weather.com/science/nature/news/zion-national-park-utah-collapse-landslide-massive-ancient-prehistoric-lake Quote The study, published Thursday in the Geological Society of America, said the park’s flat valley floor owes its creation to the collapse of a wall of Navajo Sandstone that was almost 900 miles high. Weak layers in the underlying Kayenta Formation sent debris shooting across the canyon at speeds that likely reached 90 miles per second. It's believed that the event took place around 4,800 years ago. "The ancient Zion landslide would cover New York City's Central Park with 275 feet of debris," Jeff Moore, senior author of the study, told Phys.org. "And you would need 90 times the volume of concrete in Hoover Dam to recreate the mountainside that failed." He added that the avalanche “would bury Salt Lake City’s Liberty Park 2,340 feet deep, which is almost half a mile.” The one part of this I find unbelievable is a wall 900 miles high. Probably they meant 900 meters high?? Otherwise a very interesting breakdown of an ancient natural disaster. Link to comment Share on other sites More sharing options...
seaturtlehorsesnake Posted May 28, 2016 #2 Share Posted May 28, 2016 (edited) yes, it had to have meant meters or something like that. 900 miles would be outside of the earth's atmosphere. geologic history is amazing though. Edited May 28, 2016 by seaturtlehorsesnake 1 Link to comment Share on other sites More sharing options...
Doug1029 Posted May 29, 2016 #3 Share Posted May 29, 2016 On 5/28/2016 at 1:03 AM, DieChecker said: I thought this was very interesting. https://weather.com/science/nature/news/zion-national-park-utah-collapse-landslide-massive-ancient-prehistoric-lake The one part of this I find unbelievable is a wall 900 miles high. Probably they meant 900 meters high?? Otherwise a very interesting breakdown of an ancient natural disaster. It's meters. Some copyist isn't used to metric abbreviations. Doug 1 Link to comment Share on other sites More sharing options...
cormac mac airt Posted May 29, 2016 #4 Share Posted May 29, 2016 20 hours ago, seaturtlehorsesnake said: yes, it had to have meant meters or something like that. 900 miles would be outside of the earth's atmosphere. geologic history is amazing though. That's not the only screw up. The person writing this up also mentioned that the avalanche "sent debris shooting across the canyon at speeds that likely reached 90 miles per second." Needless to say no landslide on earth ever reached the riduculously mentioned speed of 90 miles per second which is 324,000 miles per hour. cormac 5 Link to comment Share on other sites More sharing options...
seaturtlehorsesnake Posted May 29, 2016 #5 Share Posted May 29, 2016 whoa. nice catch. Link to comment Share on other sites More sharing options...
rashore Posted May 31, 2016 #6 Share Posted May 31, 2016 Lol, well maybe a wall 900 miles high could reach speeds of 90 miles per second. Link to comment Share on other sites More sharing options...
jackk Posted June 5, 2016 #7 Share Posted June 5, 2016 It is a unexpected disaster which is very dangerous. environment Link to comment Share on other sites More sharing options...
DONTEATUS Posted June 11, 2016 #8 Share Posted June 11, 2016 Its connected to The Mega Volcano thats gonna take out all of the West Coast ! Link to comment Share on other sites More sharing options...
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