The grains scream out, "Free at last." Thank you, Nick, for your efforts. You reach all the way to the coast of Maine. You were an early pandemic discovery for me. I also watched your interview with Hannah, Jordan and their students today. Great stuff.
"Arkosic" sandstones. en.wikipedia.org/wiki/Arkose. And thank you! I haven't been in a college-level geology course in over 45 years ago and this caused me to draw on what I thought I had forgotten decades ago. Plus... the Covid-biased educational theater is great. This type of learning could never have been presented back in the early 70's.
Hey.. momma d here from nogeology florida. I just learned so much.. again. How crocs are great climbing shoes for hillsides, and that my beer bubble theory might be true. As old as my brain is, it's still a marvel to me that in 10 million years or so, some geologist someday might crack my head open and say, let's put the light of day on this... What? It's a vesicle.. there's nothing in there!
These presentations never, and I mean never, disappoint. Expert educator in his element making the obscure understandable. I am so grateful for theses presentations. Thanks Nick!
The water exposure seems like a long-term event to me. I believe a flash flood, with the force it carries, would have brought larger rocks and boulders and disturbed the consistency of the sand, laying down rocks of varying sizes in a deeper horizontal band and not in that amazing thin line. Those rather evenly sized, smooth little rocks suggest to me an area in the water bed where the water was flowing consistently, continuously tumbling them, but not with enough force to displace them or cause piles of varying depth and size. Also, it seems to me that those horizontal layers in the sandstone would not be so close together and rather evenly spaced if there had been turbulent water flowing over them. It would have made a less uniform pattern and possibly wider bands, I think. Of course, I'm very new to geology in this fashion (although I have studied the patterns of rivers, their flow, the rocks carried in them, etc., and have spent a good bit of time in the high deserts of So.CA (my home State, now in So. OR) in my prospecting adventures), so that's just me trying to visualize my way through this! I LOVED THIS CLASS! Thanks, Nick, as always!
Takes me back to my Geology Lab 9 years ago! That was when I discovered how fascinating this field of study is. Instead, I pursued social work. I had my heart set on it. I don't hate what I do now, but I do wonder what it would be like to practice geology instead. Maybe it will be a second career in my future, or maybe it will stay my hobby.
To me the "horizontal" beds look like the delta deposits you showed us at the Issaquah gravel pit. My theory, as Anne Elk would say, is that the water in which the lava pillows formed was a lake and these small layers are delta deposits from pulses of water washing them into the lake. The beds that are parallel to the bed are turbid mud flows in the delta deposits and are the "high energy" flows out of which the pebbles settled.
I never took geology in college as I took engineering and got bit by the biology bug and went back to college for biology, but in biology there is the biology found in fossils and that was the extent of my geology, studying how certain fossil organisms might have came to be. I have been watching Professor Zentner for a while now and really am enjoying his classes. I'm retired now and live in New Mexico, talk about your volcano states. There are several super volcanoes here plus many smaller ones. Last eruption was only 3,000 years ago, a Hawaii type eruption that left lava tubes that cavers explore.
I have watched all of your "At Home" videos, and now all of your "On the Fly" videos. This is one of my favorites, as it clearly demonstrates the disciplined processes from detailed observation to careful interpretation. I am looking forward to seeing more of your videos. Thank you for sharing your knowledge!
Thanks for letting us audit Geology 101 field study!
3 года назад
Fascinating conversation, Nick. Thank You!!! This brings me so many insights! I've stopped here on Manastash Ridge many times over the years on my travels to enjoy the view. Thanks again for the insights to geology.
Hi Nick, Haven't commented for a while but have been following all of your stuff this summer. Enjoyed it all but this was super informative. Certainly looking forward to more like it.
I love the way you were dress the new student potential. You have characteristics of a couple of the teachers that were my greatest. When you are speaking publicly and you refer to muffler a boy or train boy, it reminds me of my math teacher in high school. Math analysis… Every time someone screeched their tires to burn rubber my teacher would shout "Mail between the age of 16 in 18 years old!" I dug the way you said instead of hanging out in the parking lot and doing whatever, come on up here and take a look at these rocks… Or something to that effect
Loved it. Take away enough (too many) years and I'm taking this course. And if this had been there at the time , I'd bet Bing would have detoured for the view point .
Dang I just missed you by a couple days! Today, Sept. 1st, I drove home from Boise and stopped at an overlook. Suddenly I realized I was in the exact spot you are in this video. I hiked to the top of the ridge and looked at all the layers you looked at just in a different spot. So cool!
Nick, With several other retired geologists looking forward to taking some early students to the geologist's paradise of SW Texas in March 2021. Good technique in your introductory explanations... Will definitely try to mimic it... :)
Which river flowed through the area at the time? Also, if we could see the very top of the newest layer (which you said had long ago eroded away), would we also see evidence of air bubbles rising to the surface? And lastly, do you know what caused the water rounded pebbles in the sedimentary rock layer? Perhaps a flood or the river changing it's path upstream? I actually think I came away from this with more questions than answers, but that is how I like my science, and it means you're doing your job in teaching us how to think and do analysis, rather than just take the info and stop thinking about it once we can answer a question on a test.
This new bloke, Ned Zinger, is just like that other bloke, Nick Zentner, in both looks and ability. Obviously twins separated at birth, and yet both have followed their heart and hammer into a world of rocks. With any luck they'll bump into each other soon. Excellent stuff from this new guy. Cheers from Jane in Hereford in England.
So are you connecting the glacial lake flush with the pebbles? What episode would tell me the time frame? Large time frames of water evaporations on the sand maybe? Were the glaciers being built then? That’s a pretty handy spot for video sharing. Wonderful for educators.
Visited this exact place today.. thanks to your episode. QQ- why sand layer is tilted by 30 deg. along with pebble ( jelly bean) .. while other half of sand layer is flat because of the reason you explain
Nick, the upper basalt looks very similar to the Ginko flow you showed us on the east bank of the Columbia at Vantage. Do you know if this is the same flow, just uplifted 1700 feet and inclined?
Nick an excellent virtual GEOL 101 LAB field trip. Very focused and great presentation of material. *-) ps. NO Tanqueray Gin bottles for the students A-HaHaHa
Do the textural clues in the pillow flows concur with the textural clues in the sediments with respect to flow directions? Additional note: You were curious yesterday about the amygdules in the amygdaloidal basalts. Today's vesicular (bubbled) basalts serve as a good visual comparison example. The difference that makes the bubbles amygdules instead of vesicles is when they are filled with minerals, i.e. a mineral filled vesicle is called an amygdule. Zeolites are a common mineral group that can fill these voids, though not exclusive. When weathered out from the rock they can sometimes be redeposited as semiprecious agates. Some shores of Lake Superior are great hunting grounds for these treasured stones. I'm really enjoying your content professor Z.
Would love to see you explain what Randal it talking about. I know you have different focus of study but you bolth bring excitement to joe every man in geology. Have fun.
Is this where you get some of the rocks for the bottom drawer? Also prevailing weather patters norther hemisphere is not likely to create strong consistent wind N to S or S to N. However if this was a micro climate say between two tall mountain ranges you might find this in very limited location. Outside the box.
Anybody else get mad at theirself at some point in the video? We talked about, and knew, how the pillows formed. Thought about how layer 2 came to be. Then we got to the "b" line. Formed by river, or beach? The correct answer is...maybe. Ol' Prof. Zinger here has us open our mind to a different idea, and has us thinking "Yeah. That's it. Wind blowing over a sandy desert. Sure!" Then nails us with "but, the pillows? Had to be wet" Doh! (Curse you pillow structures!) It instantly felt like I'd been called out in class or chastised, in a gentle way, knowing the real meaning was "Waddaya doing back there? Nappin'? Pay attention, noob, and ya might learn something!" lol. Thanks for that old memory, Ned Zinger. If that is your real name!
Good evening profesor id like your take on esrth crust displacement theory and a good explenation on why the development recently of the mantle plumes rapidvgrowth and why doest fit the question on how the crust is lubed in order for it to work
Stands to reason if water makes cobbles boulders and everything else round. Why would it not make grains of sand round? What we learned when I was going through the ranks, is if one were to examine the Sand through a jewelers loop, one would find wind blown erosion to create angular and broken surfaces. Where the erosion by water creates rounded! Yea…
I'm thinking rivers because the rivers like Wenatchee and the Columbia have moved around a lot over the past few million years, yet obviously not the whole story.
Very interesting! But I think the pebbles or jelly beans have more to say in this story. Also, I wonder if the outcrop is 1000 ft up, is there a different level under level 1 or does level 1 go down for 1000 feet below the pavement?
Is there a place or source of the sandstone? I noticed there is not any big rocks in it. So does this mean this may have been a giant lake story? Because rivers carry large rocks over great distance. I am imagining an area that was something like the Great Basin story. And maybe as the lake receded it slowly deposited the sands on its heals? Very curious about it?
The reason that you cannot focus at extreme closeup may be that the lens can only focus up to a certain point. Wide angle lenses can focus much closer than a telephoto lens. However, they all have a limit. The lens that you can focus closest with is a macro lens. So you may want to hold a rock sample at least the minimum focus distance from the lens. The distance you are holding the rock samples is making me cross eyed!
wife and I went to Richman beach on the west side and found the same basalt with bubbles. when could the bubbles develop because of water or ice age conditions in this situation?
Nick this may help you with the focus issues while videoing I noticed during the Darrel Cowen interview your phone kept trying to autofocus with the trees in the background And then Darrel in the foreground I'm going to assume you are using an Iphone I don't but most educators i know use iPhone the process is similar if you have an android If you tap the screen on what you are trying to focus on like minerals in a rock it will change the focus to it. if you want it to stay focused on an object you tap and hold the screen on the subject and will go into AE/AF lock it will stay locked in that focus mode just remember to tap the screen when you are done to change the focus back to auto or you will be blurry This link will do better than I can in explaining it without sounding too techy lol www.cultofmac.com/327215/capture-blur-free-iphone-vids-with-this-tip/
He mentions it at around 38:50, says it is polagonite, a type of obsidian that as it weathers it de-vitrofies and breaks down to form that yellowish rock.
3 года назад
Yet, yes... I get it... Water was here... pillows!
I'm surprised there wasn't a variety of Zeolites in the vesicles of the Basalt of layer one. Not far from where I live in NSW Australia, there is a vast layer of vesicle Basalt that have a number of the common Zeolites in it.
Skyfacer is your basalt related to the Aussie hot spot story, subduction story, or crustal extension story? Brisvegan here. Our basalt is hot spot 20-30Mya.
@@KathyWilliamsDevries It's an extensive intrusion into overlaying sedimentary strata. Part of the intrusion is solid basalt with areas of vesicle Basalt. The solid basalt is often seen in columnar, roughly hexagonal shrinkage structures. It's dated from the Tertiary Period. Petrographically, the Basalt is Olivine Basalt with the occasional Dolerite as well. The Zeolites found in the vesicles are Natrolite. Chabazite, Heulandite and Stilbite. All common Zeolites plus a number of rarer ones. They are mostly white or pale orange in colour. It's a great collecting area.
A further note on the Zeolites. There's not much in the way of high-quality specimens and these minerals often completely fill up the vesicles. However, when they are seen in tiny hollow 'geodes' the Zeolite crystals can be quite sparkly. Best seen with a 10X magnifying lens.
@@KathyWilliamsDevries The Tertiary spans an immense time period. It began about 65 million years ago, following the Cretaceous period, and extended to the beginning of the Quaternary, about 2 million years ago. As far as mantle 'plumes' go, Australia has an entirely different Geological sequence of events. Australia is also a very 'worn down' island continent, Hence we don't have anywhere near the spectacular scenery that the North American continent has.
This is crazy-making. I certainly cannot explain why a totally rational looking sandstone is punctuated with almost orthogonal pebbles. If the big brain of Prof Z can't make a convincing conclusion for us, maybe I shouldn't feel so bad.
Never to old to enjoy leaning when it's an excellant teacher.
Than you Professor Nick
The grains scream out, "Free at last." Thank you, Nick, for your efforts. You reach all the way to the coast of Maine. You were an early pandemic discovery for me. I also watched your interview with Hannah, Jordan and their students today. Great stuff.
awesome. I spent the night up there as a trucker a few years ago. thanks.
Ned Zinger's camera brings all the trucks to the yard
"Arkosic" sandstones. en.wikipedia.org/wiki/Arkose.
And thank you! I haven't been in a college-level geology course in over 45 years ago and this caused me to draw on what I thought I had forgotten decades ago. Plus... the Covid-biased educational theater is great. This type of learning could never have been presented back in the early 70's.
Hey.. momma d here from nogeology florida. I just learned so much.. again. How crocs are great climbing shoes for hillsides, and that my beer bubble theory might be true. As old as my brain is, it's still a marvel to me that in 10 million years or so, some geologist someday might crack my head open and say, let's put the light of day on this... What? It's a vesicle.. there's nothing in there!
These presentations never, and I mean never, disappoint. Expert educator in his element making the obscure understandable. I am so grateful for theses presentations. Thanks Nick!
Excellent! Fascinated by every moment.
LoL good humor ! Real field lesson feeling so priviledged and student all eyes and ears far from Finland. Thank you 😊
The water exposure seems like a long-term event to me. I believe a flash flood, with the force it carries, would have brought larger rocks and boulders and disturbed the consistency of the sand, laying down rocks of varying sizes in a deeper horizontal band and not in that amazing thin line. Those rather evenly sized, smooth little rocks suggest to me an area in the water bed where the water was flowing consistently, continuously tumbling them, but not with enough force to displace them or cause piles of varying depth and size.
Also, it seems to me that those horizontal layers in the sandstone would not be so close together and rather evenly spaced if there had been turbulent water flowing over them. It would have made a less uniform pattern and possibly wider bands, I think.
Of course, I'm very new to geology in this fashion (although I have studied the patterns of rivers, their flow, the rocks carried in them, etc., and have spent a good bit of time in the high deserts of So.CA (my home State, now in So. OR) in my prospecting adventures), so that's just me trying to visualize my way through this! I LOVED THIS CLASS! Thanks, Nick, as always!
Ya gotta respect a geologist that wades around in rattlesnake country wearing....Crocs.
Chances are you will never be bitten or bothered by a rattlesnake unless your messing with it.
The timing is great for watching live from Australia (11:00 am AEST). Wonderful session.
#1 vesicles, gas pockets- entablature. #2 sandstone 15 myo sand-dunes cross beds.- lake ? #3 pillows -lava flow into lake. Great episode!
Takes me back to my Geology Lab 9 years ago! That was when I discovered how fascinating this field of study is. Instead, I pursued social work. I had my heart set on it. I don't hate what I do now, but I do wonder what it would be like to practice geology instead. Maybe it will be a second career in my future, or maybe it will stay my hobby.
Do what you love. Find a way to incorporate it into your life. Thank you for your public service. We don't realize how short life is until we get old.
Tiny pebbles...now I've got that Don Ho song in my head!
For those of us who are NOT geologists, GEOL 101 field trips are great!
To me the "horizontal" beds look like the delta deposits you showed us at the Issaquah gravel pit. My theory, as Anne Elk would say, is that the water in which the lava pillows formed was a lake and these small layers are delta deposits from pulses of water washing them into the lake. The beds that are parallel to the bed are turbid mud flows in the delta deposits and are the "high energy" flows out of which the pebbles settled.
Had to delete my later comment, it was identical to yours.
I never took geology in college as I took engineering and got bit by the biology bug and went back to college for biology, but in biology there is the biology found in fossils and that was the extent of my geology, studying how certain fossil organisms might have came to be. I have been watching Professor Zentner for a while now and really am enjoying his classes. I'm retired now and live in New Mexico, talk about your volcano states. There are several super volcanoes here plus many smaller ones. Last eruption was only 3,000 years ago, a Hawaii type eruption that left lava tubes that cavers explore.
Makes us feel like we are in class! Thank you!
Thank you Nick I appreciate you for doing this.
I learned more from this field trip than any other so far . . . great!
This was a great one! Thank you, Nick!
Very interesting, even if it is Geology 101! Lol! Thank you for your thirty years of dedication!🙂👌
Thank you Dr. Zentner for a very good lecture. It is fun learning about geology with you.
I have watched all of your "At Home" videos, and now all of your "On the Fly" videos. This is one of my favorites, as it clearly demonstrates the disciplined processes from detailed observation to careful interpretation. I am looking forward to seeing more of your videos. Thank you for sharing your knowledge!
That was fantastic. Enjoying these field trips, Nick.
Enjoy these field trips! Learn so much!
Had a ball with this. Answered your questions with the very basic knowledge I've accumulated. Some right, some wrong. Great stuff.
One of your better episodes, Thanks
This was a great episode! Love the concept of analyzing a landscape.
Thanks again - Geol 101 is always more fun the second time round!
Thanks again! This is great.
Thanks for letting us audit Geology 101 field study!
Fascinating conversation, Nick. Thank You!!! This brings me so many insights! I've stopped here on Manastash Ridge many times over the years on my travels to enjoy the view. Thanks again for the insights to geology.
Great episode Nick, ya gotta love it!
Hi Nick, Haven't commented for a while but have been following all of your stuff this summer. Enjoyed it all but this was super informative. Certainly looking forward to more like it.
Nice bonus material about palagonite. I love these extra info nuggets.
Thank you for making the Geology 101 Lab available to the general public. Now to wonder about the water and the event that caused the pebble layer.
Thanks for giving me a destination - hoping to bike here from Seattle this weekend!
Many Brets to you! Great video Ned Zinger!
"This is your instructor, Ned Zinger" -- ahahahahaha!
Thanks Nick! 😁❤
Great episode!
Literally watching this video from the truck parking lot.
Thank you Nick… I sure enjoyed your technique of teaching
Thanks again Nick! I think I will eventually catch up 👍👍
I love the way you were dress the new student potential. You have characteristics of a couple of the teachers that were my greatest. When you are speaking publicly and you refer to muffler a boy or train boy, it reminds me of my math teacher in high school. Math analysis… Every time someone screeched their tires to burn rubber my teacher would shout "Mail between the age of 16 in 18 years old!" I dug the way you said instead of hanging out in the parking lot and doing whatever, come on up here and take a look at these rocks… Or something to that effect
Loved it. Take away enough (too many) years and I'm taking this course. And if this had been there at the time , I'd bet Bing would have detoured for the view point .
Dang I just missed you by a couple days! Today, Sept. 1st, I drove home from Boise and stopped at an overlook. Suddenly I realized I was in the exact spot you are in this video. I hiked to the top of the ridge and looked at all the layers you looked at just in a different spot. So cool!
outstanding!
Beautiful place
Nick, With several other retired geologists looking forward to taking some early students to the geologist's paradise of SW Texas in March 2021. Good technique in your introductory explanations... Will definitely try to mimic it... :)
Ned “Zinger”??!?! Did I hear correctly?🤣
Yeah, I hit the rewind too.... Leave it to Ned... err, I mean Nick.
"Nerd Zinger"... that's a good moniker. 🤣
Which river flowed through the area at the time? Also, if we could see the very top of the newest layer (which you said had long ago eroded away), would we also see evidence of air bubbles rising to the surface? And lastly, do you know what caused the water rounded pebbles in the sedimentary rock layer? Perhaps a flood or the river changing it's path upstream?
I actually think I came away from this with more questions than answers, but that is how I like my science, and it means you're doing your job in teaching us how to think and do analysis, rather than just take the info and stop thinking about it once we can answer a question on a test.
This new bloke, Ned Zinger, is just like that other bloke, Nick Zentner, in both looks and ability. Obviously twins separated at birth, and yet both have followed their heart and hammer into a world of rocks. With any luck they'll bump into each other soon. Excellent stuff from this new guy. Cheers from Jane in Hereford in England.
So are you connecting the glacial lake flush with the pebbles? What episode would tell me the time frame? Large time frames of water evaporations on the sand maybe? Were the glaciers being built then? That’s a pretty handy spot for video sharing. Wonderful for educators.
Visited this exact place today.. thanks to your episode. QQ- why sand layer is tilted by 30 deg. along with pebble ( jelly bean) .. while other half of sand layer is flat because of the reason you explain
Nick, the upper basalt looks very similar to the Ginko flow you showed us on the east bank of the Columbia at Vantage. Do you know if this is the same flow, just uplifted 1700 feet and inclined?
Nick an excellent virtual GEOL 101 LAB field trip. Very focused and great presentation of material. *-) ps. NO Tanqueray Gin bottles for the students A-HaHaHa
Nice job Ned!
When I saw those pebbles I thought they were plant stems because of the shadow
No A.C. to fix, waiting on Nick! Get it on big guy!
Wow! So much at a Viewpoint stop. A creek flowing North to South? Flowing into what river system? Your best field trip yet, Nick. Thanks again.
My favorite professor , Ned Zinger...😂😂😂
Look like the pebbles found in our river's in eastern Missouri. They from rolling in fast moving water. Would they be that high?
Ned is at it again!
Some time in the future, It would be nice to describe what geology is happening today. Uplift, subduction, ect...
steve moye With an unhealthy amount of human generated detritus.
Do the textural clues in the pillow flows concur with the textural clues in the sediments with respect to flow directions?
Additional note: You were curious yesterday about the amygdules in the amygdaloidal basalts. Today's vesicular (bubbled) basalts serve as a good visual comparison example. The difference that makes the bubbles amygdules instead of vesicles is when they are filled with minerals, i.e. a mineral filled vesicle is called an amygdule. Zeolites are a common mineral group that can fill these voids, though not exclusive. When weathered out from the rock they can sometimes be redeposited as semiprecious agates. Some shores of Lake Superior are great hunting grounds for these treasured stones.
I'm really enjoying your content professor Z.
"...You Gotta Love 'em!" :-D
Would love to see you explain what Randal it talking about. I know you have different focus of study but you bolth bring excitement to joe every man in geology. Have fun.
We are paying....*
*attention
I just watched a 42 minute video about a highway parking bay. ☺
Is this where you get some of the rocks for the bottom drawer? Also prevailing weather patters norther hemisphere is not likely to create strong consistent wind N to S or S to N. However if this was a micro climate say between two tall mountain ranges you might find this in very limited location. Outside the box.
Anybody else get mad at theirself at some point in the video? We talked about, and knew, how the pillows formed. Thought about how layer 2 came to be. Then we got to the "b" line. Formed by river, or beach? The correct answer is...maybe. Ol' Prof. Zinger here has us open our mind to a different idea, and has us thinking "Yeah. That's it. Wind blowing over a sandy desert. Sure!" Then nails us with "but, the pillows? Had to be wet" Doh! (Curse you pillow structures!) It instantly felt like I'd been called out in class or chastised, in a gentle way, knowing the real meaning was "Waddaya doing back there? Nappin'? Pay attention, noob, and ya might learn something!" lol. Thanks for that old memory, Ned Zinger. If that is your real name!
Geology is a beautiful thing. Thank you Dr. Nick. So, how did that layer of pebbles get into the sandstone?
Fan tastic
Good evening profesor id like your take on esrth crust displacement theory and a good explenation on why the development recently of the mantle plumes rapidvgrowth and why doest fit the question on how the crust is lubed in order for it to work
On th close ups the focus is on clear on the ground and not your hand. Maybe you could put the sample on a clipboard and frame the shot there... 🤔
Stands to reason if water makes cobbles boulders and everything else round. Why would it not make grains of sand round? What we learned when I was going through the ranks, is if one were to examine the Sand through a jewelers loop, one would find wind blown erosion to create angular and broken surfaces. Where the erosion by water creates rounded! Yea…
Educational.
I'm thinking rivers because the rivers like Wenatchee and the Columbia have moved around a lot over the past few million years, yet obviously not the whole story.
Very interesting! But I think the pebbles or jelly beans have more to say in this story. Also, I wonder if the outcrop is 1000 ft up, is there a different level under level 1 or does level 1 go down for 1000 feet below the pavement?
Gotta be a first: Playoff basketball bumping into geo 101 lab.
Are layers 1 and 3 different because of different cooling times?
Could a desert push the jelly beans?
Is there a place or source of the sandstone? I noticed there is not any big rocks in it. So does this mean this may have been a giant lake story? Because rivers carry large rocks over great distance. I am imagining an area that was something like the Great Basin story. And maybe as the lake receded it slowly deposited the sands on its heals? Very curious about it?
The reason that you cannot focus at extreme closeup may be that the lens can only focus up to a certain point. Wide angle lenses can focus much closer than a telephoto lens. However, they all have a limit. The lens that you can focus closest with is a macro lens. So you may want to hold a rock sample at least the minimum focus distance from the lens. The distance you are holding the rock samples is making me cross eyed!
I am guessing that 1st basalt layer was deposited on dry land since it is not pillowed or is it?
Catching up at 01:21 :)
wife and I went to Richman beach on the west side and found the same basalt with bubbles. when could the bubbles develop because of water or ice age conditions in this situation?
Thanks "Ned Zinger" 😁
Is that a possible layer of ash between the pillows and the sand?
Good view at 37.13 min
Nick this may help you with the focus issues while videoing I noticed during the Darrel Cowen interview your phone kept trying to autofocus with the trees in the background And then Darrel in the foreground I'm going to assume you are using an Iphone I don't but most educators i know use iPhone the process is similar if you have an android
If you tap the screen on what you are trying to focus on like minerals in a rock it will change the focus to it. if you want it to stay focused on an object you tap and hold the screen on the subject and will go into AE/AF lock it will stay locked in that focus mode just remember to tap the screen when you are done to change the focus back to auto or you will be blurry
This link will do better than I can in explaining it without sounding too techy lol
www.cultofmac.com/327215/capture-blur-free-iphone-vids-with-this-tip/
Thanks Tony. Will try....with my nose!
Fun. I'm a geologist by proxy!
Sorry, Nick, but all I could hear is Steve Martin.. saying "Those aren't pillows!!"
What is the yellow rock at the base of layer 3?
He mentions it at around 38:50, says it is polagonite, a type of obsidian that as it weathers it de-vitrofies and breaks down to form that yellowish rock.
Yet, yes... I get it... Water was here... pillows!
I'm surprised there wasn't a variety of Zeolites in the vesicles of the Basalt of layer one. Not far from where I live in NSW Australia, there is a vast layer of vesicle Basalt that have a number of the common Zeolites in it.
Skyfacer is your basalt related to the Aussie hot spot story, subduction story, or crustal extension story? Brisvegan here. Our basalt is hot spot 20-30Mya.
@@KathyWilliamsDevries It's an extensive intrusion into overlaying sedimentary strata. Part of the intrusion is solid basalt with areas of vesicle Basalt. The solid basalt is often seen in columnar, roughly hexagonal shrinkage structures. It's dated from the Tertiary Period. Petrographically, the Basalt is Olivine Basalt with the occasional Dolerite as well. The Zeolites found in the vesicles are Natrolite. Chabazite, Heulandite and Stilbite. All common Zeolites plus a number of rarer ones. They are mostly white or pale orange in colour. It's a great collecting area.
A further note on the Zeolites. There's not much in the way of high-quality specimens and these minerals often completely fill up the vesicles. However, when they are seen in tiny hollow 'geodes' the Zeolite crystals can be quite sparkly. Best seen with a 10X magnifying lens.
So if it’s tertiary, less than 20 million? Related to when NSW passed over the mantle plume?
@@KathyWilliamsDevries The Tertiary spans an immense time period. It began about 65 million years ago, following the Cretaceous period, and extended to the beginning of the Quaternary, about 2 million years ago. As far as mantle 'plumes' go, Australia has an entirely different Geological sequence of events. Australia is also a very 'worn down' island continent, Hence we don't have anywhere near the spectacular scenery that the North American continent has.
The aggregate seems to large for wind blown.
High energy event. Landslide possibly.
We have just been "Zinged"..........
This is crazy-making. I certainly cannot explain why a totally rational looking sandstone is punctuated with almost orthogonal pebbles. If the big brain of Prof Z can't make a convincing conclusion for us, maybe I shouldn't feel so bad.