Beneath Greenland's Hiawatha Glacier lies a 31-km impact crater detected by ice-penetrating radar. Thackeray argues its fresh appearance contradicts the 58-million-year argon dating. Pettke et al. 2013 found a platinum peak near Younger Dryas onset (~12,800 years ago), unlike the deformed Chesapeake Bay crater (35 million years old).
Hiawatha Crater and Greenland ice core evidence for Younger Dryas impact
GreenlandTheory
Site mentioned
Key facts
- 31-kilometer-diameter impact crater detected beneath Hiawatha Glacier in Greenland using ice-penetrating radar
- Argon dating suggested 55 million years, but Thackeray argues this is inconsistent with fresh crater rim and no ice older than 12,800 years at the site
- Pettke et al. 2013 paper identified platinum peak (PPP) in Greenland ice core close to Younger Dryas onset
- Onset of Younger Dryas cooling (OYD) is globally recognized at approximately 12,800 years ago
- Chesapeake Bay impact crater (35 million years old) is used as comparison, being 60-70% as old but completely deformed while Hiawatha appears fresh
Sources
Hiawatha Glacieren.wikipedia.org
Hiawatha Glacier attracted attention in 2018 because of the discovery of a crater beneath the surface of the ice sheet in the area. A publication noted in 1952 ...
Effect of ice sheet thickness on formation of the Hiawatha ...sciencedirect.com
by EA Silber · 2021 · Cited by 14 — Hiawatha is a 31 km wide putative impact crater found below the Greenland Ice Sheet. • The impact should produce a trace of distal rocky ejecta ...
A Late Paleocene age for Greenland's Hiawatha impact ...science.org
The ~31-km-wide Hiawatha structure, located beneath Hiawatha Glacier in northwestern Greenland, has been proposed as an impact structure that may have formed ...
The Hiawatha Impact Cratersvs.gsfc.nasa.gov
The Hiawatha impact crater is potentially one of the youngest large impact craters on Earth. more than 31 kilometers across. The size of the ...
Crater Beneath Greenland Glacier Is 58 million Years ...news.climate.columbia.edu
In 2018, researchers discovered a massive, 19-mile-wide crater concealed beneath the Greenland ice sheet. A March 2022 study used argon-age ...
Was this story useful?
Keep exploring
Every site on this page sits on the globe, and the people who research them are on the Discord.
3D Globe · Sites by country · Story Archive · Research Library · Weekly Journal · Search
AI-generated text · images from the original sources · always verify with the sources.