I love the "In the field" videos. Always great scenery combined with very visual and well explained Geology. As much as loved "Mappy McMap and the White Board", that have by the way have become Icons in their own right, this goes to another level. Pictures paint a thousand words. And all this is free.Thank you so much for everything over many years Mr Zentner.
Great episode. It is hard not to be incredibly impressed by Jeff Tepper. My impression of him is as follows: (1) By virtue of his personality and demeanor, Dr. Tepper epitomizes the saying: “A gentlemen and a scholar”. With him, it is clear that a big mind does not have to speak loudly or brashly. (2) He is superb at explaining a things simply and is super patient-he must have been a fabulous professor. (3) His slab rollback and breakoff theory still seems very compelling and makes a lot of sense. Thanks Nick for having yet another outstanding episode with Dr. Tepper. And finally, the scenery, as in all your videos, was stunning. We are so lucky to have you making these videos for us “geologists wanna-bees”!
I love this! I’m a scientist but not a geologist but have dabbled here and there “on the rocks” and can follow pretty much everything you and Jeff are explaining (just don’t ask me to repeat anything lol!). I can’t wait to venture into Granite Falls and other western Cascades foothills to look for these what I’m calling “birthmarks”! Thank you Nick and Jeff! 🪨 ⛏️
Good old Granite Falls: I had property there..."before geology" in my life. 👍🏼 Learning enclave and host, and stock, seeing with new eyes. This is a real pleasure. Thank you, Jeff and Nick.
I am so glad that a few years ago when you ran out of material to share with us that you decided that we would forge ahead and learn new things together. Today was another learning day. Thanks Nick and Jeff.
This guy is teaching me so much! Petrology is really really wonderful!!!!! You are doing stunning videography, Nick, the texture of the images is really coming thru. Do more of that ant time.I am learning so much. Thank you thank you. this IS BIG,
Thank you Nick, I learn something every time I watch your channel. Thank you for the time, and showing us these wonderful places. I may only dream of seeing these places, but it's nice to know they exist. There is so much more to learn.
Fascinating petrology field trip! Dr. Shamloo’s lecture on volcanoes and “mush” came to mind. This really helped me start to understand this process! Thank you!
It’s so cool to learn with you about those basalt “enclaves.” This is by far one of the best uses of internet technology out there: Streaming audio/visual educational info, bringing remote locations and incredible expertise to the home. Thanks for all you do.
I love these videos, I always learn so much and I love the beautiful rocks and scenery! I swear I have seen boulders like these in Canmore, Alberta, I will have to check my photos.
I was on a hike with other ladies from the Mountaineers earlier in the summer (while in the Granite Falls area no less!), and it was cool to know that others in the group were hip to your RU-vid channel, Nick! Your insightful videos are an inspiration to us hikers out there!
Snohomish County Public Works had a large quarry pit that featured part of this pluton, but it was tested and found to be rich in arsenic, so was abandoned. Arsenic in the local groundwater remains an issue. Radon intrusion into homes in the area is also associated with this pluton.
Nick, there's an old saying in Geology: "Either you teach or you are taught." I think here you were taught! Dr. Tepper's knowledge is deep and wide here. It was a real pleasure listening to him; he taught us all with "Once you See them, then you realize they are everywhere." I can't wait to get back in the Sierra Nevada batholith, with a whole new set of eyes and understanding. Thank you Dr. Zentner.! Thank you Dr, Tepper!
Oh man, another incredible location! I’ve only recently been out there and I was more concerned with the salmon working their way up the river than the rocks I climbed through to photograph them. Awesome!
I love your videos. I grew up in Chelan so I am familiar with the area much of what you are talking about. My father had a degree in geography, so he had a good knowledge of geology and we had many conversations about rocks, etc. One of the last things I was able to share with him was your video about Lake Chelan, which he greatly enjoyed.
Very interesting. I've seen these things while hiking around. Great to finally know what they are and the settings in which they formed. Always something to learn from this channel.
I have long wondered why liquid mafic enclaves, to use Jeff's wonderful term, are immiscible in granitic melts. The explanation and distinction between the different types of inclusions (liquid vs. solid) makes complete sense. Thanks, as always, to you and all your guests for enlightening me and so many others who love learning.
😮🎉 If I had a head exploding emoji I would be using it. First of all- I love granite falls with the river and rocks. Have loved it since my earliest memories camping up river. More importantly- I always wondered what those dark inclusions were and how they got into the granite. Now I know!!!!! My brain is now full. No need to learn anything else. This is like the rosetta stone for me. Keep up the good work From Battery Fully Charged. p.s. Was walking along Puget Sound today at Richmond Beach. The rip rap for the railroad had many granite boulders with both angular and oval basalt inclusions!!! The anglular inclusions were a different shade of dark grey that the oval ones.😊
I take my Rc rock crawler there all the time. And I love watching the salmon jump up the falls. Also just wanna say thanks for all the work you do. You inspire so many people. Including me. Last month found myself up blewett pass. Found my first fossil. One a leaf the other I'm not sure. Can't wait to go back! Thanks Nick
Thank you Jeff and Nick! I have seen those "inclusions"/"enclaves" many many times and always wondered about them. I am not a geology student really, and quite a bit of Nick's presentations are over my head, I am glad to be able to access the opportunities you provide to add a bit more to my loosely understood geology. Thanks again to both of you for past and ongoing presentations.
Thanks for this fun field trip NIck - I am loving these sessions with Jeff Tepper learning more about batholiths and plutons! Now I am prompted to look at some of the ice age erratics around Wenatchee to see if any of them have these features, and ponder what that might tell us about their origins.
Flatlander from Nebraska I had opportunity to spend my junior year with relatives attending Marysville HS. GF was in our athletic conference. 56 years ago. Both beautiful and treacherous (OSA landslide) is Washington and western Washington in particular
I would have thought that the intrusive material was just a stone caught in the sediment, and it was all turned into a conglomerate. I learned more again today, and it was great.
I have some granite boulders with enclaves and I am going out with my hand-lens to check boundary grain size. Thanks for the geology project! The scalloped boulders are great. I noticed how armored the bed was. Everything was locked together with sparse loose gravels. Spring runoff must be a torrent.
excellent such a great piece of taffy or enclave added to the "mix" both literally and figuratively! lol thank you for your playfull wit and ideas around such great scenery and geology in place and time, the game is afoot! Watson says holmes.. love love love i support you
11:37 "So you know I like to push things too far..." Looks around slightly worried, as if considering if there's space to back up if pushed. "Figuratively." Ha, ha! That was a good one! :)
Thank you Nick - this was an incredible video. One of my favourite rocks is Conglomerate from the BC Cascades. I now understand so much more. Look forward to Jeff Tepper spending more time with you ... possibly in the Sierra's? (or in British Columbia?)
Outstanding video. I've spent much time in this area and now the rocks and geology are making more sense. I would have guessed xenoliths as well. I hope someday you will do a piece on the geology of Mount Pilchuck, just up the Mountain Loop Highway.
wow great stuff I'm currently in Saudi in the Arabian-Nubian shield doing some general exploration work, been on/off here for over 25 years now, its, excuse the local pun geologist's mecca, endless barren outcrops without as much as a blade of grass to be seen...one friend commented its look very barren, yes I replied arent I lucky. My current base at the door step, has mafic dikes mingling and fragmenting (sub angular-sub round) in the local tonalite pluton Jeff Tepper's comments will give the morning coffee over the backyard tonalite a bit more to ponder over than usual. BTW USGS previously had a big presence here in the shield/kingdom, some of your distinguished guests would likely concur first hand...thanks for your great informative videos...the other spelt Jeff...Geoff.
Guesses of that plant between you and the rocks and licorice fern in the first location is 1) salmonberry, 2) goats beard, or 3) black cap raspberry. Any of these should be, I think, less than 3 thousand feet elevation most of the time. I think at Mount Si that's about where it cuts out. Highest I'd expect would be five thousand. More likely 1000.
I've always felt SF of the Stilly west of Robe is much younger than east up valley due to the shape of the valley. Deep, sweeping valley walls and oxbows turn into steep walled canyons all the way past the fish ladder. Add to that the thick layer of clay, which is indicative of pooled water, and I believe there was a large lake that was most likely formed due to a lahar or a glacier impounding water around Robe, that eventually broke through and carved out Robe Canyon.
Maybe CWU should set up some kind of cheap hotel and act as a base for tourists? Nick and his friends could double up as tourist guides on hikes and see sites like this.
I will look back to see if there's a video on Mt Persis; I think UW had fingered that as the remnant of the earliest Cascade Volcano in that ~45 Mya time frame. It's SE of Monroe towards Mt Index. Helpful tip for y'all: beware of vehicle prowls around Granite Falls. One time I went hiking out there and my car was broken into. I talked to a police officer in town about it and he said it's really bad. Lots of drug addicts that do smash & grab at trailheads and such.
