Part 4 of 4: A Journey Through 1.3 Billion Years of Time on a Transect of Antelope Island, Utah
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- เผยแพร่เมื่อ 17 เม.ย. 2023
- In this four-part video series, head out with geology professor Shawn Willsey as he explores four distinct rock units and explains the fascinating stories of each. As we conclude with Part Four, we'll investigate the youngest rocks on the island, the Cambrian (500 to 550 million year old) Tintic Quartzite, which was deposited as sand and gravel deposits on the shoreline of ancient North America.
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Shawn Willsey
College of Southern Idaho
315 Falls Avenue
Twin Falls, ID 83303
Approximate GPS Location: 41.00404, -112.20778 - วิทยาศาสตร์และเทคโนโลยี
You do well, sir, making these little geological vignettes. I thoroughly enjoy them. If I don’t learn anything, I don’t waste my time. Yet I’ve watched almost all of your videos.
Thank you very much.
Looking forward to your next production.
Thanks for being a loyal viewer. I like learning as well as I put these together. Win-win.
Growing up around the great Salt Lake and actually in my younger years visiting antelope Island before it became a state park , I spent a lot of time working on the cattle ranch I was fascinated looking at the Wasatch Mountain’s from the top of antelope Island, and seeing the vast amount of sediment that must’ve been laid down between the two mountain ranges. I have heard that the sediment can be as deep as 5000 feet or more. I would love to understand and hear how this mountain ranges were formed and uplifted in this valley. Which would also involve the ocher mountains and the large, Kennecott copper mine on the Oquirrh mountains range
I lived in Ogden and went to school at the University of Utah. I drove by Antelope Island hundreds of times. Little did I know that there was 1.3 billion years of earth history there. Thank you so much for this.
Hey Shawn I've been watching your videos for a while now and you do a great job. I really enjoy them! Funny thing, I made the connection the other day that you are a co-author of one of my favorite books 'Roadside Geology of Idaho,' a book which I have read numerous times and have with me on any outdoor adventure I go on. I really appreciate your work. Thank you.
You bet. Glad you made the connection. I also wrote "Geology Underfoot in Southern Idaho" if you are interested.
The bugs can be so bad that you can't even get out of the car!!!
Timing is key to enjoy the island.
This series really interests me. I grew up seeing Antelope Island from my backyard! Never made it over, although my little brother’s boy scout troop did not long after the causeway was built.
We visited Antelope Island a few years back, in February. Needless to say, a hike to the ridge wasn’t in the cards. Thanks for doing the hard work for us. I would never guess we were looking at rocks that old.
I have been to antelope island many times over fifty years. I four wheeled to it Before the paved road war built and a State park. I marveled over the geology on the island . I take my two young grandsons out to the island and we drive all over looking at Stansbury island to the south west and Fremont island to the north. Spectacular views. My imagination runs wild thinking of the ancient lake Bonneville surround by water up to 900 feet. And now it is evaporating. Help save the Great Salt Lake!
Have to agree, best explanations reviewed I’ve seen, enjoying it a lot!
Very well done. I will never look at Antelope Island the same way again.
What a gorgeous day to take us on a geologic odyssey! Terrific series Shawn, the stories behind each one of those rock layers makes my head explode! WOW.
Thanks so much for this video series. I've visited all of Utah's National Parks, but I've never been out to the Great Salt Lake. Never even knew about Antelope Island. It's very interesting how the rock outcrops are so different within a relatively short hike up a hill.
Thank you, Shawn, for these thoroughly well done videos! 😊
Thank you for taking us along in your backpack. As I can no longer go on hikes, I so do appreciate!
Any time!
Tintic quartzite 👌🏼 so fascinating and attractive. 500 ma, continental north american shore. Wow. A real pleasure to hear about and see. I'm grateful that you love to teach!
I enjoyed the four part geologic story. Nice job!
Great series, Shawn. Thank you.
This was fun to watch, thank you for all the details and defining the parts of the story and how they intertwine.
Very cool story. How incredible to have three ver distinct periods of earths history. I’ll have to stop there the next time I’m in UT.
Wow,was in the Tumalo highlands( Eastside Cascades near Bend, below the 3 sisters)hiking in a canyon with my wife, rock hammer and dog. Stopped to eat a salad and this series pops up, talk about timely! Just awesome professor Willsey! Felt like I was exactly where I should be doing what I should!
Another excellent series... Hopeful you can do a road trip to Heart Mountain in Wyoming to explore / explain the same (snowball earth?) dolomite age rocks that represent one of the greatest mysteries in geologic history. Seems there is no 100% consensus as to how those rocks, mountain sized, moved so far east. Thank you for all you do...
Thanks for hoofing it! (So we don’t have to…🤣). Nice rock “stories”.
This four part series is fantastic. I have hiked Antelope Island. Now the next time I go there I will know what’s going on
This series rocked! I’ve endured the biting gnats in May on Antelope Island but also admired and reflected on the very same rocks you’ve highlighted and it’s very appreciated to know their back story.
Thx Prof ✌ Always enjoy your geo adventures.
Thank. you for this 4 part series on a specific area of Utah, which seems to have more geology than anywhere else.
This has been such an interesting series. Quite amazing how in this one small area you are able to find these sedimentary conglomerate/ cuartzite, metamorphic rocks and igneous rocks all having a role in the formation of early Earth and the beginings of early North America.
Great series. Thanks for sharing.
What an amazing part of the world. It's amazing how flat and spread out it is then the contrast of the Wasatch Mountains. Awesome videos, thanks for posting!
Enjoyed the 4-part series very much. Thanks for the videos.
Wow! Beautiful island and valley. Thanks, Shawn, for another informative interesting video. ❤
,,,,wow...!................land o' lakes,wi.....here for class x 4 .....beautiful footage,,,,..total picture of stone age explained...thank you for this great vid.....what a view !.😯😯...pat& family
Thanks!
Thanks so much for your kind donation in support of my geology videos.
An excellent walk and geological explanation of the area
Thanks very much for this series and for the Goblin Valley State Park episode. I grew up in Utah, but I really never learned anything about the geology of the state except for Lake Bonneville, its shorelines, gypsum deposits to the south, orogenies that gave rise to the Wasatch range, the tectonic forces that lead to the Basin and Range province. It would have been good to visit these areas on foot, but I’m in Arizona now and have little opportunity to travel in Utah. I appreciate the work you do.
That was really interesting. I live nearby and it is great to better understand the geology in an area I see everyday.
There is so much snow down there right now!
Thank you! I enjoyed all 4 of the series!
Fantastic series, thank you!
This was a fabulous series, Shawn. Although I have seen videos about the snowball earth, I never knew many of the details you presented.
Great series, Shawn! I'm looking forward to being able to identify the diamictites of the Pocatello formation on my next hike up Scout Mountain!
Thanks! I love Antelope Island! Such a little gem in the Great Salt Lake! I can't thank you enough for all the education you offer on your channel. You inform so much of my work and it has really helped make me so much better at what I do. If you're ever back up in the Yellowstone area, I'm in Livingston! I'd love to join you on an adventure, or buy you lunch! Cheers!
Thank you for your kind donation and I'm glad you enjoy the geology videos I make. I did a bunch of Yellowstone videos last fall (and a few this winter) so I think I covered the park pretty well for now, but I will let you know when my travels bring me that way again. Thanks again.
@@shawnwillsey I definitely have enjoyed those episodes from Yellowstone! Again, cheers and thank you!
Awesome!
Thanks! Informative and entertaining. I've enjoyed revisiting some of these locations.
Thanks for your kind donation. Much appreciated.
*Let the Sunshine In...*
thanks
Great series! Thx for this info.
Great series Shawn! Love your videos, keep up the good work!
Great series, beautiful place, phenomenal rocks! Thank you for breaking it into logical segments. Once again, the excellent descriptions accompanying actual views of the rocks and their placements in the landscape make everything easier to understand and retain. I learn and remember more from one of your 10 minute videos than some hour-long lecture or 400-page textbook. (Today's word is "diamictite"...)😊
Danika, thanks for your kind words and generous donation. So glad to hear my efforts resonate and help folks. win-win!
@@shawnwillsey Quite welcome! I'm glad to finally have the opportunity (at 64) to learn geology, and even better, from a professor who takes us on field trips!
Here in the San Rafael, the rule is be ready for gnats on months that start with J. June and July. They're gnasty and agnoying.
Is there no end to the amazing geology in Idaho thank you for sharing ❤
Your jacket is the same blue of the 1970 Fiat 850, which was a convertible. A truly tiny car.
Thanks
Thanks for your kind donation. Cheers!
Thumbs up!
Go to Desert mountain down by the sand dunes there. It’s a awesome place!
This has been an interesting series about an area I didn't know about. Thanks to you i I have learned a lot more about this part of Utah. I had one trip where we drove both ways on I 80 from CO to CA. At one stop across the salt beds I did test to see if it really was salty. A very tourist thing I suspect but I was a tourist at the time. This series has been good for me to learn more about sedimentary rocks and landforms. Sedimentary is my weakest area of rock id. This has also covered the most I have seen about snowball earth. I'm becoming more interested in it. I just got the book titled Large Igneous Provinces, as part of my flood basalt study. That book will be a challenge for me to read. I've also gotten more books about the ice age floods. Thank you for your videos which are helping me learn about our earth.
Oh,learning that Antelope Island was part of the shoreline of North America was nice. One thing I wondered during the Baja BC series was about where the shoreline of Western North America was. I realize now that Blakey's book will tell me more. That was good to learn. I had known it was also part of Lake Bonneville. I'm seeing there is a water story there through different times.
The lastest, but not the leastest that tells the facts of Geologic time and how rocks can be read to KNOW what actually happened in the past every 6,000 & 12,000 years. Do one on the failing magnetic field we are living out today.
A good lesson of stratigraphy and petrology. Fluvial deposits near the shoreline?
Excellent
I am wondering if some of the changes in the size of the stones in the rock you showed us could have been due to glacial drift? The rounded gravel seems like it could have been deposited during periods of glacial retreat.
I’m curious why the exposed rocks from snowball Earth do not look very weathered. How long ago were they exposed to the elements? The surfaces that are exposed look quite angular, especially the second group up from the valley floor shown in a previous video.
Any fossils in that Cambrian Rock Shawn? I had a question out of context if you don't mind. Australia's 3.6 billion yo Stromatolite fossils are the oldest ever known fossils of life, a prokaryote cyanobacteria that started the Oxygen cycle on Earth because it was photosynthetic. I seem to remember reading somewhere there was some extreme ancient rock exposed in Greenland of the same age, do you know anything about that? All I can find is Australia. Retired bio/engineer here.
Not in the Tintic Quartzite. Overlying it in the Wasatch is the Ophir Shale (also Cambrian) which has trace fossils and I think some trilobites in places. I did a video here on a roadside outcrop. th-cam.com/video/WlfA0jnUySg/w-d-xo.html
I don't know anything about your Greenland question. Sorry.
There are clasts of banded iron formation in the Tintic Quartzite. No Idea where the source area was.
The San Rafael Swell intrigues me to no end. To be honest the radium and uranium deposits got me wondering what had happened and then the layering of Moenkopi to Navaho Sandstone are fascinating to me. My wife thinks I'm nuts... anyway do you have anything in that area. Or would you be interested in a SXS ride?
I have few videos from the San Rafael Swell area: th-cam.com/video/IqiJOlfYwMo/w-d-xo.html or th-cam.com/video/7qiwik6usvc/w-d-xo.html
Is Antelope Island typical of a Horst-Graben structure and, if so, is it part of the larger area to the west throughout most of Nevada, or is it connected geologically to the Wasatch Range?
Yes, steep normal faults on both sides of island define the horst structure. It is part of the Basin and Range province where normal faults have uplifted large crustal blocks. This region stretches from the Sierra Nevada to the Wasatch Range.
Utah bugs ❤🥰
Professor Willsey, how can it be determined that a beach/shoreline is an ocean front versus a shoreline of a lake?
Fossils would be one indicator. Another might be looking at rocks either above/below or adjacent to see if they change to shale/limestone sequence.
They look like some Roman ruins I saw in Europe.
Fun Fact: Electronic bikes are NOT considered motorized vehicles. This allows you to get miles into wildernesses in minutes, not hours.
"Rocks are rocky. But not bullwinkle-y."
---Albert Einstein
"Rocks are rocky because they're always rocked with rocking."
---Albert Einstein
Impartial fact checkers say..."True!" ✔
Thanks!
fascinating series! thank you!
Thanks!
Thanks!
Thanks!