I grew up in that area of AZ and I am uneducated. We lived out in the desert when I was small and so many questions that came to me then, are being answered by this video, 60 years later. Thank you.
If you can still see your basemap you haven't taken enough strikes and dips. I had the privilege of being undergraduate and graduate student of Dr. Davis seeing this video what is a real treasure
Thank you for the talk. I found it fascinating. Towards the end you asked for feedback. The only thing I would suggest is explaining earlier on that the fault is the result of stretching rather than compressing. I was trying to figure out the fault assuming it was something similar to a thrust fault. I was also intrigued by the introduction (to me) about the 4th category of rocks. I have observed fault rocks before but never knew what they were called.
This was an excellent presentation. I really appreciated where you demonstrated using your arms. That really helped me comprehend the movement that took place.
Thank you for a very clear presentation of the geology of this area of Arizona. My husband and I spent 6 weeks in the area some years ago and had the then current Roadside Geology of Az. We traveled over much of the state with that book. We enjoyed the unique beauty of the dessert areas. The last two years I have learned much more geology by watching other geologist on youtube.. Just found your program and will watch for more from AGS.
I took Stephen's Structural class, and he truly is magnificent! Visiting Tuscon Mineral Show and Saguaro Natl Park in February. Can't wait to see this with my own eyes.
I've learned a lot, and I already knew a lot. For example, I have climbed most of the Rincon mountains multiple times, including the mountain called Charlie's Cliff once. I studied geology at the University of Arizona, and I have done interpretation for the Forest Service. This presentation helps me better visualize the extensional transformation of Western North America.
Excellent presentation which has only enhanced my appreciation for the mountains which have exerted a pull over me since childhood. One question, though: What part did the Little Rincons play in the story of the range as a whole?
Feedback: I thought the presentation was terrific! I do think it might have helped (me, at least) to put a brief primer on the general properties of a metamorphic core complex at the beginning of the talk and then fill in the specifics as presented in the Rincon Mountains. That slide showing Scotland vs. the Rincons you skipped over in the talk was very helpful by the way. Thanks!
The map at the 13-minute mark shows clear path of large amounts of water that likely sat, for times, on either side of the Rincons and the Santa Catalinas, easterly at Redingrton and in between San Manuel and Mammoth and westerly, a large flood plain. I've lived and travelled all over the Southwest, and lived in Phoenix, Yuma, Springerville, Duncan, Safford, and Green Valley, back in the '50s, so I am more than passing familiar with the landscape. I was struck by the staggering amount of evidence of water erosion, across areas that don't see six inches of rain per year, in a wet year. The visible landscape is much younger than the ages of the rocks that are exposed. I don't believe, with good reason, the landscape of Earth is much older than 10,000 years, not even an eyeblink in geological terms, but an inconceivable time for humans. It appears to have witched those who study time-related topics. It is comforting to think of the violent events that created the mountains we see, to "millions of years ago", but the landscape does everything but hang a sign out to say, "Nope, all new arrivals"! Now, there is a "mineral aggragate" called "cataclasite", for "cataclysm", from the sound of it. Yup, there have been more than a few of those, despite the concerted efforts of religionists and educators (surprise! surprise!), to erase cataclysms from the record. It's illogical, on the face, in the body, but it is real. The Grand Canyon was NOT "carved" by the Colorado River (except the very bottom canyon, like the canyons behind Glen Canyon Dam a matter of hundreds of feet high, NOT thousands), and definitely NOT "millions of years ago". You mention "shattering", like the mountains in the In-Ko-Pah Gorge, out of the eastern California desert, up to Jacumba, the mountains show shattering into large rectangular shapes. As if titanic forces were altering the landscape in the middle of an electrical storm from hell, lightning flashing with metronomic regularity and manic intensity. This world, especially the Southwest, was stressed to breaking and beyond. The "twisting" you speak of at the 43-minute mark is found across the West. I started wondering what kind of force could do that to rock, when I was a child, clambering around old Anasazi ruins, in Colorado, in Idaho, in Oregon and northern California. Something twisted, folded, and spindled, the Earth, at some point.
I grew up in that area of AZ and I am uneducated. We lived out in the desert when I was small and so many questions that came to me then, are being answered by this video, 60 years later. Thank you.
If you can still see your basemap you haven't taken enough strikes and dips. I had the privilege of being undergraduate and graduate student of Dr. Davis seeing this video what is a real treasure
Thank you for the talk. I found it fascinating. Towards the end you asked for feedback. The only thing I would suggest is explaining earlier on that the fault is the result of stretching rather than compressing. I was trying to figure out the fault assuming it was something similar to a thrust fault. I was also intrigued by the introduction (to me) about the 4th category of rocks. I have observed fault rocks before but never knew what they were called.
This was an excellent presentation. I really appreciated where you demonstrated using your arms. That really helped me comprehend the movement that took place.
thank you this is awesome!
Thank you for a very clear presentation of the geology of this area of Arizona. My husband and I spent 6 weeks in the area some years ago and had the then current Roadside Geology of Az. We traveled over much of the state with that book. We enjoyed the unique beauty of the dessert areas. The last two years I have learned much more geology by watching other geologist on youtube.. Just found your program and will watch for more from AGS.
I took Stephen's Structural class, and he truly is magnificent! Visiting Tuscon Mineral Show and Saguaro Natl Park in February. Can't wait to see this with my own eyes.
Been to the top up Redington canyon. Spent years of weekends in there. Born and raised in Tucson 66 years ago.
Great talk.
I've learned a lot, and I already knew a lot. For example, I have climbed most of the Rincon mountains multiple times, including the mountain called Charlie's Cliff once. I studied geology at the University of Arizona, and I have done interpretation for the Forest Service. This presentation helps me better visualize the extensional transformation of Western North America.
Thank you for sharing your information.
Very impressive, George and colleagues
Cool. I hike the Rincon foothills in SNP-East almost daily.
Excellent presentation which has only enhanced my appreciation for the mountains which have exerted a pull over me since childhood. One question, though: What part did the Little Rincons play in the story of the range as a whole?
Excellent presentation! You mentioned an earlier presentation focused on the Tucson Mountains. Please provide a link if one is available.
Feedback: I thought the presentation was terrific! I do think it might have helped (me, at least) to put a brief primer on the general properties of a metamorphic core complex at the beginning of the talk and then fill in the specifics as presented in the Rincon Mountains. That slide showing Scotland vs. the Rincons you skipped over in the talk was very helpful by the way. Thanks!
The map at the 13-minute mark shows clear path of large amounts of water that likely sat, for times, on either side of the Rincons and the Santa Catalinas, easterly at Redingrton and in between San Manuel and Mammoth and westerly, a large flood plain. I've lived and travelled all over the Southwest, and lived in Phoenix, Yuma, Springerville, Duncan, Safford, and Green Valley, back in the '50s, so I am more than passing familiar with the landscape. I was struck by the staggering amount of evidence of water erosion, across areas that don't see six inches of rain per year, in a wet year.
The visible landscape is much younger than the ages of the rocks that are exposed. I don't believe, with good reason, the landscape of Earth is much older than 10,000 years, not even an eyeblink in geological terms, but an inconceivable time for humans. It appears to have witched those who study time-related topics. It is comforting to think of the violent events that created the mountains we see, to "millions of years ago", but the landscape does everything but hang a sign out to say, "Nope, all new arrivals"!
Now, there is a "mineral aggragate" called "cataclasite", for "cataclysm", from the sound of it. Yup, there have been more than a few of those, despite the concerted efforts of religionists and educators (surprise! surprise!), to erase cataclysms from the record. It's illogical, on the face, in the body, but it is real. The Grand Canyon was NOT "carved" by the Colorado River (except the very bottom canyon, like the canyons behind Glen Canyon Dam a matter of hundreds of feet high, NOT thousands), and definitely NOT "millions of years ago".
You mention "shattering", like the mountains in the In-Ko-Pah Gorge, out of the eastern California desert, up to Jacumba, the mountains show shattering into large rectangular shapes. As if titanic forces were altering the landscape in the middle of an electrical storm from hell, lightning flashing with metronomic regularity and manic intensity. This world, especially the Southwest, was stressed to breaking and beyond. The "twisting" you speak of at the 43-minute mark is found across the West. I started wondering what kind of force could do that to rock, when I was a child, clambering around old Anasazi ruins, in Colorado, in Idaho, in Oregon and northern California. Something twisted, folded, and spindled, the Earth, at some point.
wow nice work,5x5 Datil NM territory
Haha. This is great. Geologists that climb over closed gates. I do it but I’m very careful
Screw the Ukraine flag bs. Thank you very much.
Ukraine had a goddamn problem with the Russia's actions and why did it Park all those nuclear missiles on the border of Russia?