Lake Superior and the Midcontinent Rift: the billion year story
ฝัง
- เผยแพร่เมื่อ 22 ธ.ค. 2015
- This short video tells the “story behind the scenery” covering both the geology and geoheritage - how the MCR gave rise to Lake Superior that is the basis of the area’s water-based history and economy, the copper deposits that shaped the region’s settlement and growth, and today’s tourist industry.
Video coproduced by: Abigail Foerstner and Seth Stein, Northwestern University; Carol Stein, University of Illinois at Chicago
Funded by EarthScope
Lake Superior is Superior 👍 So blessed to be near her🤗 She's magical and healing, guaranteed💦
Very interesting. Really enjoyed the footage. Thanks for sharing
Being a native-born Michigander, I found this extremely interesting. I never heard of this until 15 years ago. The geologic history of the Michigan area is more interesting and complex than I could have imagined when I was younger.
My education is in forestry, never had a geology course. Being from Michigan, and a ranger on Isle Royale in the past I found this very interesting.
Honestly, their poses are tuff 💪
I've always loved the rocks and cliffs of lake Superior. Thanks for helping fill in the backstory!
Are we to assume from the graphics that the failed rift valley became the Mississippi River watershed?
1.1 billion puts us close to the creation of the super continent Rodinia. I wonder if that forced the rift shut or had some affect on it.
Great video, thank you for uploading.
Amazing video. Keep it up earthscope!
This is explaining this geological stuff and describing processes better than any Nat Geo show or thick volumed encyclopedia out there! You have a knack for intriguing visualization -thank you for your research and the organization and this video!
Isn't it ironical that the two biggest fresh water lakes in the world (Victoria and Superior) sit on midcontinental rifts?
The copper from Isle Royale was mined a lot farther back than 500yrs ago. It was Isle Royale copper that made the European bronze age take off.
Wonderful video!
I like watching videos and have seen many on the great lakes.
18 mile deep rift under lk superior, interestingly the geographic center of MI is the Hemlock area, right where the east arm of the rift goes. And glacial and other deposits in the mid MI area made bedrock 18 miles down...If we ever have a earth quake in mid MI and, it's knocking stuff of the walls its a major quake. I was taught that the arms of the rift are wish boned and the western arm extended to KS and, the east arm petered out in Montrose MI.
I am intrigued by the hypothesis that part of the rift was successful when Amazonia broke off. I just have one lingering issue with it. How did Amazonia get out of the way fast enough before the Grenville Front moved in?
I was just looking at a Map and I noticed Lake Superior is located just south of Hudson Bay...Is there a connection...is the Hudson part of the rifting process that formed Lake Superior?
I just published a paper correlating the Jacobsville with the Bayfield. Dr. Malone (2016) pulled a bunch of zircons from both. The Jacobsville is NeoProterozoic in age. It is and isn't related to the MCR...we think. The slightly older Oronto Group clearly is related to the MCR.
Central North American summers -