Turtle & Piarazzo (1998) suggest a smaller initial diameter but make no estimates of the depth; they do, however, suggest an impactor of 10-14km diameter. Located just over 100 kilometres away from Johannesburg, the Vredefort Dome is so named because, when the meteorite hit, the rock layers of the ground were bent into the shape of an upside-down bowl. Granophyre dykes in the central part of the Vredefort impact structure arebelieved to be the remnants of the impac t melt sheet, which intruded downwards along thefractures in the crater floor. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Intense and randomly oriented remanent magnetization observed in surface samples at Vredefort has been attributed to impact-generated magnetic fields. To make a crater 300 km wide, the meteorite must have been about 10 km across (as big as a mountain) and travelling at more than 10 km per second (36 000 km/h!). {/eq} kilometers or {eq}24.9 How deep could the Vredefort asteroid have penetrated? The best answers are voted up and rise to the top, Earth Science Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Earth Science Stack Exchange is a question and answer site for those interested in the geology, meteorology, oceanography, and environmental sciences. Whilst the downwarping in the rim syncline surrounding the Vredefort Dome played a major role in Therefore, a clear way to dis-tinguish between lightning and impact-related fields is to Most of my images were from approximately 2000 feet above the ground. Allowing for uncertainties in our modeling procedures, we consider final craters 120 to 200 km in diameter to be consistent with the observed locations of PDFs at Vredefort. The crater, 100 meters deep and 1.3 km wide is situated 40 km north west of Pretoria/Tshwane. By signing up, you'll get thousands of step-by-step solutions to your homework questions. rev 2021.4.12.39055. Wünneman & Ivanov (2003), which also discusses crater morphology; meanwhile Turtle et al. Therriault et al. © copyright 2003-2021 Study.com. (1 answer) Closed 11 months ago. Thanks for contributing an answer to Earth Science Stack Exchange! How deep would it have been, relative to the original ground height, immediately after the dust settled, and before any erosion kicked in? Evidence found at the Chicxulub crater and other similar craters that suggests they had carbonaceous chondrite. Connect and share knowledge within a single location that is structured and easy to search. The dikes con-tain clasts of shocked target rocks [4,5], and have a Re-Os signature indicative of a mete- The area witnessed the … Stack Overflow for Teams is now free for up to 50 users, forever. … The central part of the world heritage site exposes rocks normally found at a depth of 25 kilometres below the surface. Evidence of energy release. Grieve et al. Finding order of acidic strength for given compounds. How are the Scala dei Turchi staircases formed? The crater has formed after a collision of Earth and the asteroid that was more than 10 km in … This makes Vredefort the largest known impact structure on Earth. It , however, rapidly collapsed to a final crater size of 300 km width and about 10 km depth, and this has been gradually eroded, leaving us without a real crater to look at, but with a window into the deep interior of the original central uplift of this giant impact structure. Our experts can answer your tough homework and study questions. Dietz (1961) describes the impact crater as "40km across and 16km deep" - i.e. By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The Vredefort crater is the largest impact crater in the world. It is thought to have been traveling at a rate of about 20 kilometers per second. How does the tribonacci sequence have anything to do with trigonometry? the interpretation that a 36 km thick crust has been turned Our study focuses on a well-exposed section of … Heater to maximum, not rendering ( `` commenting '' ) texts with specific colors where you see. 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