The Impact Crater in Lake Superior; The Slate Islands Cataclysm

Hidden in plain sight within Lake Superior is a massive 19 mile wide impact crater. This feature is known as the Slate Islands Crater, and formed as part of an Earth wide cataclysm referred to as the "Ordovician meteor event". This video will discuss the 31 kilometer wide impact crater in one of the Great Lakes, and mention what caused the Ordovician meteor event.

Thumbnail Photo Credit: Google Earth, Image NOAA, Image © 2023 Maxar Technologies, Image © 2023 CNES / Airbus. This image was then overlaid with text, overlaid with a red dotted circular outline of the buried impact structure, before being finally overlaid with GeologyHub made graphics (the GeologyHub logo and the image border).

Estimates on asteroid diameter, velocity, and tnt energy equivalent in this video were sourced using the calculator at https://impact.ese.ic.ac.uk/ImpactEar..., which was used with permission.

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Google Earth imagery used in this video: ©Google & Data Providers

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Various licenses used in sections of this video (not the entire video, this video as a whole does not completely fall under one of these licenses) and/or in this video's thumbnail image:
CC BY 2.0: https://creativecommons.org/licenses/...
CC BY 4.0: https://creativecommons.org/licenses/...

Sources/Citations:
[1] U.S. Geological Survey
[2] G. Collins & others, "A numerical assessment of simple airblast models of impact...", Meteoritics & Planetary Science, https://doi.org/10.1111/maps.12873 (2017), CC BY 4.0
[3] https://impact.ese.ic.ac.uk/ImpactEar...

0:00 Great Lakes Impact Crater
0:56 Simple & Complex Craters
1:40 Ordovician Meteor Event
3:40 The Impact Occurs
4:07 L Chondrite