Great video. Have you heard of Dan Hausel? He is a retired Wyoming Geologist that worked for the State of Wyoming. He found a deposit of Opal in a road cut in the desert on public land. I believe we still have a bucket of Opal ore from the location. Nick Zentner has online classes for geology from a college in Washington including field trips. Thanks so much for sharing your expertise and knowledge
Although I have lived in southern California for over 35 years, and am familiar with the geology of the west coast of North America, I grew up in central Ohio in the 1960s, and lived in Michigan briefly for two years. I'm so glad to see this video about the Niagra Escarpment. Thank you!
Thanks for the lecture. I finally understand the proccesses that made the cliffs I see out my window and the glacial till under my house. I was trying to figure out how a gacier could make a cliff when it was erosion.
Great video and so informative. Having grown up in Dundas ON. it was great to see examples I have seen in person even from childhood. Also family camping trips when young we stayed in Craiglieth and the Bruce Peninsula at Cyprus Lake near the Grotto. I sent this to my oldest brother who was very impressed too.
What an excellent Video." I can't believe you only have ~7.8K views. The depth of information here deserves SO many more. If you don't mind, I'm going to promote this video on my own "Hidden Niagara" post (which I'm almost embarrassed to say has almost 385K views). I'm self-taught, but your video is far more scientifically accurate in several places I spotted right away. (I kept on thinking SOMEONE would "call me" on my use of "Dolomite" instead of "Dolostone." But I guess Eddie Murphy helped me "dodge that bullet.") LOL Regardless, thank you for this GREAT video. I'll try and steer more viewers your way - and I look forward to re-watching this video in detail. Cheers, "Niagara Glenn Norman"
Thank-you Beth for the fantastic presentation, I learned so many things and think it will give me a better appreciation and awareness of the geological formations along the trail
The Whirlpool sandstone (plus Thorold and Grimsby sands) forms a lot of shallow gas reservoirs in Haldemand County along the North shore east end of Lake Erie.
awesome to learn about Osler bluff and the glacial lake lines. I live incredibly close to the lake Algonquins reach near Osler bluff and it has a steep somewhat short hill between the two flat areas, A lot of what you talked about in regards to the area explains a lot about how these kind of oddities could form. the glacial rebound is still occuring today and an example of it is 10-15 years ago collingwood wasaga beach had a very minor earthquakes. (My friends who lived through it said it was like a garbage truck going by) all in all I love your presentation.
The bedrock formations in this video were the result/aftermath of the Taconic Orogeny, which was the first of at least three (separate) Paleozoic mountain-building events that formed the Appalachians. 1) It's been a while, but my impression was that the Taconics (being an ocean-continent/island-arc collision event) were more Alpine-to-Andean scale than Himalayan Scale [The (third) Alleghenian Orogeny was a continent-continent collision, that would be more likely to produce a Himalayan scale mountain range - as was the Grenville Orogeny, that occurred about 800 million years before the Taconic]. 2) At around 50:00: Glacial Striations in bedrock are more commonly attributed to subglacial scoring by embedded stony/gravelly bedload, than to outwash bedload. But maybe this is a specifically documented exception, that I'm simply not aware of. If chatter marks (conchoidal fracture pits) were visible on the rock surface, that would firmly nail it as subglacial. 3) I've seen a lot of on-line (in general) comments by proponents ("adherents") of the Younger Dryas Impact model, implying that the Michigan basin stratigraphy was the result of an impact, that "pushed down" the strata. But, as is evident in your video, the cross sectional geology of the basin clearly indicates that the basin and its sedimentary strata (each thicker in the middle) represent up to 100 million years of more-or-less continuous, slow, regional subsidence of the Earth's crust, infilled by the sedimentary formations, resulting in a partial isostatic feedback loop. 4) As a 30+year geologist, I worked for a few years in Rochester New York. Consultants there - who were investigating the EXTENSIVE underground chemical pollution at the Kodak Park industrial complex - coordinated extensive drilling and test-well installation in the various formations showcased in this video. For me, it was fun to see (and recognize) the formations in outcrop (vs in drill cores). Thanks so much for all the care that went into your presentation, and for your enthusiasm for Geology ! :D
Trilobites and many other similar creatures would molt periodically. The currents would then disperse the discarded parts randomly. That’s why it is common to find these these parts whereas complete trilobites are more rare.😊
Hi Beth. I was watching your video on the Niagara Escarpment geology. Facinating. When I lived in Hamilton years ago, a group of us would hike the Niagara gorge. I always thought the Escarpment was formed by an earthquake! lol. Are you familiar with a park I remember as the Kettles Park and caves. Do you know what caused these formations? I'm on the East Coast these days, and hoping to interest my Grandson in local geology. What fun. First I have to get him out of the ocean!
Awesome; going looking for fossils and minerals; loved this presentation. Really well put together. You're very Gneiss and this presentation Rocks (OMG I cant believe i used these geology puns).
what about cosmic impacts? The whole michigan basin surrounded by some of the great lakes demonstrates a classic uplift from an impact site. That would also explain your mass extinction event.
One thing I have never understood is how Georgian Bay and Lake Huron have a similar surface level, despite the escarpment cutting between Tobermory and Manitoulin Island. Fifty years ago, I was told that the escarpment went to Tobermory. I could never figure out why there wasn't another Niagara Falls between Lake Huron and Georgian Bay. For that matter, is the escarpment underwater between Tobermory and Manitoulin Island? If I scuba dive in that area, is there a submarine wall, dropping off to the east? Is the water significantly deeper to the east? On a similar note, I was looking at the facing of the ski hills at Blue Mountain. It makes sense that you ride the lifts going north, and ski downhill facing south. If the escarpment goes up the Bruce Peninsula, what are these hills near Collingwood? How is Georgian Bay east of the escarpment, and yet at its height? I'm sure there must be a simple explanation, but I could never figure that out.
