I was very interested in the Juan De Fuca Plate section. I'm not a professional geologist, but have been interested in it my whole life. My life diverged away from my dream when we were not wealthy enough for me to attend College and so I joined the military to learn a trade in Aviation and ended up making the military a career. Nice video.
A couple of years ago I became interested in the different Ice Ages and as I was researching, I came across Nick Zentner's vid on "Ice Age Floods" and I was hooked. After watching his different vids and learning about geology for the first time (I just turned 70) and since I live in Southern Cal, I thought I should research Cal geology. I'm glad I did because I found your vids. The first is very informative and easy to follow and I am looking forward to watching more and learning more from you, Thank You!
Welcome aboard, and thanks for joining the adventure! Never hesitate to ask a question, as there is so much in California, that there is always something new to learn!
Hello fellow Nick fan. I have been looking for someone who can make SoCal geology interesting too. Nick kind of spoils us. Him drawing as he goes along really helps pull you in. Makes the listening more active.
A nice overview! I hope this filters down more and more to lower grade levels in high school, middle school, and elementary school. California is such a unique and marvelous environment that school age children should get exposed while they are still young and full of wonder to all the great processes Professor Patrich describes so well in this presentation. Thanks, Professor Patrich, and hats off to you!
Thank you so much for your kind words! I hope so, too- California is nothing short of amazing. I normally get to take students out on field tips, but for obvious reasons have not... but this coming year I am thrilled to get the ball rolling!
With San Andreas on one side and Hayward on the other, Silicon Valley is an individual crumb getting strafed in both directions by the Pacific and American plates.
Hi I am a student at coc. I have not taken any of your courses yet but I am fascinated about earthquakes and geology we may cross paths one day! Thanks for the exciting information!
I've seen recently two different explanations for the basin and range country east of California. The one, presented here, is that it is a result of extension from subduction of the old oceanic spreading center. The other is a case of delamination of the subducted plate causing first expansion and subsequent gravitational collapse beneath that area. The latter seems more likely if the San Andreas formed along the old spreading center. I will admit that the delamination process is still confusing to me.
Glad it was helpful- and I am sorry for the run ons, but these videos are designed for my lecture course, and I have to reach a specific time for lectures. Hopefully the chapters help to scoot along!
Some of the gravels from the late Mesozoic in parts of the Sierra Nevada range are super-rich in gold. The scars from the Hydraulic Mines that chased these deposits are still visible today.
Pretty sure you "eocene sediments" were placed there, in the very late Quaternary period. Probably about 3,360 years ago, when a tsunami between 1,000-1,500 feet high (if not a thousand feet higher) roared across the Snake River Plain, from the gap in the Rockies, on the eastern side of Wyoming, then flooding south, across western UT, NV and eastern CA, blocked termporarily (geologically speaking) by the Transverse Mountain Ranges in CA, and the volcanic plug at the western end of the Grand Canyon, near the Parashant, and extending into Black Canyon. The water eventually ate through those roadblocks, to stream across southern California (into the LA basin, until the mud built up too high to allow more, and into the the inland area between Riverside and Fallbrook, where it sat for a long time. The waters ate away the original cover over the plug, replaced it with silt it had picked up along the way. This likely took on the order of a century, or more, for the waters to recede, on the west. In the east, the waters plundered the area behind the Front Range, filling the area west to the Wasatch Front, before cresting over the Uintahs, adn flooding into southern UT, northeastern AZ, northwestern NM, and southwestern CO, where it sat until that volcanic plug was reduced enough to let the water begin draining away, sometime in the 1st millennium AD, finally dribbling away completely circa 1250 AD. This began circa 1500 BC, hit its stride with the Joshua Stops the Sun Moment, circa 1344BC, and finished in our time. NOT "millions of years ago". Stones may be 4.5 billion years old, but they could have remained in the lithosphere for 4.4999985 billion years. Earth has a far more violent recent past than "scientists" believe. One wonders why they are so out of touch? We have anecdotal evidence that tells of unimaginable terrors. Unimaginable sorta suggests they "did not dream it up", essentially. That's what "imaginable" is, after all. One has to KNOW what terrors may be, to give them faces and actions. Think of your own irrational fears. Are they based on something in your life? Usually not. You might be the one in 10 billion (supposedly MORE than ALL the people who've called Earth home) that can create valid monsters out of whole cloth, but most of us are so pedestrian, if we haven't seen it, we cannot imagine it, making our fears "nameless" and "faceless". I get sorta frustrated with geologists who tell us "the Colorado River carved it out over millions of years". First, IF the Colorado had done it, it would have looked like the upstream-from-Glen-Canyon-Dam stretch of canyon, sheer walls clearly eroded from old seabed. The Canyon shows erosion at the top of canyons too far from the River for that water to have EVER reached them. Clearly, the water, some 50 trillion acre-feet (on the order of 2,000 times the MAX capacity of Lake Mead), came down from the north, over the Kaibab Plateau, spilling into the basin southwest of Flagstaff, and over the Mogollon Rim, at first, providing the water the Sin Agua peoples survived on, at Tuzigoot, and Montezuma's Castle, filling Walnut Canyon, on the northern edge of the MR, also, where another group of misnamed Sin Aguas survived, and generally carving the wonderland many of us know and love, all terrain shaped by large amounts of fast-moving water. Indisputably. Didn't happened in the comfortably-distant past. The resulting 300-mile-diameter lake sat on the Four Corners basin (the water line is still visible, almost glaringly so), some seeping out north of the northeasterly lava butte extending from Mt Taylor's northern lava flow, some through the gap west of Grants NM, and flooding down to the Rio Grande. The Chaco people camped on a gully transporting the dregs through the complicated drainage pattern for that area, for some 1,000-1,500 years, extending a "road" 30 miles north, when their branch began running dry. Eventually, circa 1,250, they left, for greener, wetter, pastures, in NM, CO, KS, OK, and TX. This was the norm, for almost a thousand years, devastation, destruction, the Earth wracked by seismic forces and winds that howled like banshees, near-constantly. A maelstrom on land, on seas, changing Earth into something new, everywhere. I don't believe any landscape survived untouched, and some bear little resemblance to their former selves. Can't wait to hear your explanation for the limestone plug sitting atop the 3½ western Great Lakes (Michigan, Superior, Huron and half of Erie), where they've been mining salt underneath, for at least a century ...
Well- I think we learned something new today! So the San Joaquin is part of the Central Valley- or as often discussed in academics, 'The Great Valley'!
Did the San Andreas fault move the transverse range farther apart from each other? Is it feasible to say that Mt Baldy was at one time right next to San Gorgonio Mt but the movement of the fault has since split them apart?
This is a great question. In short, no- but that doesn't mean that the area was not near each other at some point. So Mt. Baldy has a distinct geology- mostly volcanic, while San Gorgonio is mostly granite and schists. If the areas were at one point next to one another, it was before those mountain peaks existed!
I live at 2000 ft elevation in the Simi Valley Hills, between Box Canyon and Corriganville in Simi Valley, part of the transverse range. The exposed rocks,( some as large as an apartment building and many as large as a house ) and material here apparently originated in a series of huge marine landslides 65 million years ago off the coast of present day Central America. Not many fossils here because it's not sedimentary , but a jumbled mass of silt and rocks up to 1000' ft thick at of the time during the landslides 65 million years ago. This is the time of the great dinosaur die off from an asteroid hitting in the Gulf of Mexico 65 million years ago. I wonder which happened 1st, the die off or the landslides, or were the slides caused by the asteroid?
This is a great question, and honestly, one I didn't really think much about. The short answer is.... o, the Pennsylvanian epoch does not have the same names in Europe or China. In Europe, the Pennsylvanian epoch is called the Stephanian, and in China, it is called the Upper Carboniferous. The Pennsylvanian epoch is the last epoch of the Carboniferous Period, which lasted from 323.2 to 298.9 million years ago. It is named after the state of Pennsylvania, where the rocks of this epoch were first studied. The Stephanian is the equivalent of the Pennsylvanian in Europe. It is named after the St. Stephen's coal mine in France, where the rocks of this epoch were first studied. The Upper Carboniferous is the equivalent of the Pennsylvanian in China. It is named after the fact that the rocks of this epoch are found in the upper part of the Carboniferous System in China. The different names for the Pennsylvanian epoch reflect the different ways that geologists in different parts of the world have divided up the geological timescale.
31:38 Are we sure that the Laramide Orogeny occurred because the Farallon plate dipped beneath North America? Or was it caused by the formation of the Atlantic Ocean pushing North America westward over a subcontinent?
Thanks for your comment- we are somewhere in the middle. According to the USGS the North American Plate is moving West-Southwest- the primary direction being west. As for "upward" I am reviewing my video, as I am not sure of the context- but will get back to you once I find it!
Drive the PCH ! From sunset cliffs 92107 to shelter Cove King's range Humboldt County ! Bring your favorite girl.. Favorite surfboard and best bud doggie
@@Jeremy.Patrich the surfboard turns it a week ! Needles- Sunset Cliffs San onofre trail #3 Trestles San clemente Malibu by the pier Rincon Random spots from Santa Barbara to monterey Pleasure point /18th street Santa Cruz Chart house half moon bay The other ocean beach Stinson Lost coast Shelter cove Humbo !
1 teeny error: Montana is part of the Wyoming Craton which is by far one of the oldest parts of North America. You can definitely touch rocks older than 1 billion years there. Other than that, I thought your presentation was very accurate and your excitement for the material is palpable, which makes learning fun! Great job, thank you for making this available for free for all the prospective rock nerds out there!
I know! Its because I use these lectures in my College level courses, so I have to cover my bases- which is where the Chapter Content on RUclips comes in handy so you can skip to the part you wanna watch!
Perhaps the best short introductory video on California's geologic history that I've come across. Extremely well done and easy to follow.
Wow, thanks! Thank you so much for your kind words!
9pj8p.
I was very interested in the Juan De Fuca Plate section. I'm not a professional geologist, but have been interested in it my whole life. My life diverged away from my dream when we were not wealthy enough for me to attend College and so I joined the military to learn a trade in Aviation and ended up making the military a career. Nice video.
Thank you for your kind words! Thank you for your service, and let me know if there is anything I can help answer along the way!
A couple of years ago I became interested in the different Ice Ages and as I was researching, I came across Nick Zentner's vid on "Ice Age Floods" and I was hooked. After watching his different vids and learning about geology for the first time (I just turned 70) and since I live in Southern Cal, I thought I should research Cal geology. I'm glad I did because I found your vids. The first is very informative and easy to follow and I am looking forward to watching more and learning more from you, Thank You!
Welcome aboard, and thanks for joining the adventure! Never hesitate to ask a question, as there is so much in California, that there is always something new to learn!
Oh..yes I have only recently discovered Nick..he just posted a new one 3 hours ago! Joined a rock club a few days ago-rocks.
ruclips.net/video/xJ0zMvstKYk/видео.html
Hello fellow Nick fan. I have been looking for someone who can make SoCal geology interesting too. Nick kind of spoils us. Him drawing as he goes along really helps pull you in. Makes the listening more active.
Another Nick fan
He got me to travel to Missoula and see the ice age flood area and Eastern Washington
A nice overview! I hope this filters down more and more to lower grade levels in high school, middle school, and elementary school. California is such a unique and marvelous environment that school age children should get exposed while they are still young and full of wonder to all the great processes Professor Patrich describes so well in this presentation. Thanks, Professor Patrich, and hats off to you!
Thank you so much for your kind words! I hope so, too- California is nothing short of amazing. I normally get to take students out on field tips, but for obvious reasons have not... but this coming year I am thrilled to get the ball rolling!
I really enjoyed this video. It's very educational and easy to follow. Thank you for sharing this information.
Of course! Thank you for taking the time to comment- it really means a lot! If you ever think of other information you would like to see- let me know!
ruclips.net/video/xJ0zMvstKYk/видео.html
I’m taking a California geography class and this is helpful. Thank you!
Oh good! Let me know if there is anything I can do to help!
The graphic/animation at 18:20 is amazing. When you realize what you're looking at...amazing!
I agree! Also, the fact that you can go and visit that location, and still find some of those rocks... our oldest rocks, is really incredible!
ruclips.net/video/xJ0zMvstKYk/видео.html
My papa took geology. Probably back in the 60s. He lives in the Sierra Nevadas, he loves it up there. :)
I do too!
Thanks. I love geology and all the processes that go into it. Fun. Fun. Fun.
Glad you enjoyed it!
With San Andreas on one side and Hayward on the other, Silicon Valley is an individual crumb getting strafed in both directions by the Pacific and American plates.
Hi I am a student at coc. I have not taken any of your courses yet but I am fascinated about earthquakes and geology we may cross paths one day! Thanks for the exciting information!
I really appreciate your kind words, and I hope to see you in a class soon!
Love it. I have Vasquez rocks Hubbard canyon dreams from as child. I live and raised around there and bouquet Cyn Sierra Palona range.
So cool! It not far from my home- and whenever I drive by- I always think of the Flinstones! -
I’m mad af that I didn’t study Geology in college. All those social sciences rotted my brain lol
I don't blame you! Luckily... its never to late to! Geology is a rocking discipline, and don't take my words for granite!
@@Jeremy.Patrich Can we take your words for diorite?
You can- but be careful…. You would hate to lose your Apatite
@@Jeremy.Patrich Okay, I'll play gneiss.
Holy batman, this is mondo informative. Thank you
Glad you enjoyed it! Stick around for some more... same bat time... same bat channel...
1:10... I know enough that even living my 58 years in San Jose, Ca. I have heard every one of those names you mention.
Thank you! It is probably because that map is not near you- it is in Los Angeles County!
I've seen recently two different explanations for the basin and range country east of California. The one, presented here, is that it is a result of extension from subduction of the old oceanic spreading center. The other is a case of delamination of the subducted plate causing first expansion and subsequent gravitational collapse beneath that area. The latter seems more likely if the San Andreas formed along the old spreading center. I will admit that the delamination process is still confusing to me.
alot of wonderful information to be sure! Except the timing ques and running on, when not needed. sad when i find myself fast forwarding...
Glad it was helpful- and I am sorry for the run ons, but these videos are designed for my lecture course, and I have to reach a specific time for lectures. Hopefully the chapters help to scoot along!
Some of the gravels from the late Mesozoic in parts of the Sierra Nevada range are super-rich in gold. The scars from the Hydraulic Mines that chased these deposits are still visible today.
So true!
Mahalos for the detail geo lecture
Thank you for taking the time to say hello!
Pretty sure you "eocene sediments" were placed there, in the very late Quaternary period. Probably about 3,360 years ago, when a tsunami between 1,000-1,500 feet high (if not a thousand feet higher) roared across the Snake River Plain, from the gap in the Rockies, on the eastern side of Wyoming, then flooding south, across western UT, NV and eastern CA, blocked termporarily (geologically speaking) by the Transverse Mountain Ranges in CA, and the volcanic plug at the western end of the Grand Canyon, near the Parashant, and extending into Black Canyon. The water eventually ate through those roadblocks, to stream across southern California (into the LA basin, until the mud built up too high to allow more, and into the the inland area between Riverside and Fallbrook, where it sat for a long time. The waters ate away the original cover over the plug, replaced it with silt it had picked up along the way. This likely took on the order of a century, or more, for the waters to recede, on the west.
In the east, the waters plundered the area behind the Front Range, filling the area west to the Wasatch Front, before cresting over the Uintahs, adn flooding into southern UT, northeastern AZ, northwestern NM, and southwestern CO, where it sat until that volcanic plug was reduced enough to let the water begin draining away, sometime in the 1st millennium AD, finally dribbling away completely circa 1250 AD. This began circa 1500 BC, hit its stride with the Joshua Stops the Sun Moment, circa 1344BC, and finished in our time. NOT "millions of years ago". Stones may be 4.5 billion years old, but they could have remained in the lithosphere for 4.4999985 billion years. Earth has a far more violent recent past than "scientists" believe. One wonders why they are so out of touch? We have anecdotal evidence that tells of unimaginable terrors. Unimaginable sorta suggests they "did not dream it up", essentially. That's what "imaginable" is, after all. One has to KNOW what terrors may be, to give them faces and actions. Think of your own irrational fears. Are they based on something in your life? Usually not. You might be the one in 10 billion (supposedly MORE than ALL the people who've called Earth home) that can create valid monsters out of whole cloth, but most of us are so pedestrian, if we haven't seen it, we cannot imagine it, making our fears "nameless" and "faceless".
I get sorta frustrated with geologists who tell us "the Colorado River carved it out over millions of years". First, IF the Colorado had done it, it would have looked like the upstream-from-Glen-Canyon-Dam stretch of canyon, sheer walls clearly eroded from old seabed. The Canyon shows erosion at the top of canyons too far from the River for that water to have EVER reached them. Clearly, the water, some 50 trillion acre-feet (on the order of 2,000 times the MAX capacity of Lake Mead), came down from the north, over the Kaibab Plateau, spilling into the basin southwest of Flagstaff, and over the Mogollon Rim, at first, providing the water the Sin Agua peoples survived on, at Tuzigoot, and Montezuma's Castle, filling Walnut Canyon, on the northern edge of the MR, also, where another group of misnamed Sin Aguas survived, and generally carving the wonderland many of us know and love, all terrain shaped by large amounts of fast-moving water. Indisputably. Didn't happened in the comfortably-distant past.
The resulting 300-mile-diameter lake sat on the Four Corners basin (the water line is still visible, almost glaringly so), some seeping out north of the northeasterly lava butte extending from Mt Taylor's northern lava flow, some through the gap west of Grants NM, and flooding down to the Rio Grande. The Chaco people camped on a gully transporting the dregs through the complicated drainage pattern for that area, for some 1,000-1,500 years, extending a "road" 30 miles north, when their branch began running dry. Eventually, circa 1,250, they left, for greener, wetter, pastures, in NM, CO, KS, OK, and TX. This was the norm, for almost a thousand years, devastation, destruction, the Earth wracked by seismic forces and winds that howled like banshees, near-constantly. A maelstrom on land, on seas, changing Earth into something new, everywhere. I don't believe any landscape survived untouched, and some bear little resemblance to their former selves.
Can't wait to hear your explanation for the limestone plug sitting atop the 3½ western Great Lakes (Michigan, Superior, Huron and half of Erie), where they've been mining salt underneath, for at least a century ...
San Juaquin Valley is called Central Valley. Never once have I heard it called Great Valley.
Well- I think we learned something new today! So the San Joaquin is part of the Central Valley- or as often discussed in academics, 'The Great Valley'!
Thank you interesting lecture
Glad you liked it!
Did the San Andreas fault move the transverse range farther apart from each other? Is it feasible to say that Mt Baldy was at one time right next to San Gorgonio Mt but the movement of the fault has since split them apart?
This is a great question. In short, no- but that doesn't mean that the area was not near each other at some point. So Mt. Baldy has a distinct geology- mostly volcanic, while San Gorgonio is mostly granite and schists. If the areas were at one point next to one another, it was before those mountain peaks existed!
I live at 2000 ft elevation in the Simi Valley Hills, between Box Canyon and Corriganville in Simi Valley, part of the transverse range. The exposed rocks,( some as large as an apartment building and many as large as a house ) and material here apparently originated in a series of huge marine landslides 65 million years ago off the coast of present day Central America. Not many fossils here because it's not sedimentary , but a jumbled mass of silt and rocks up to 1000' ft thick at of the time during the landslides 65 million years ago. This is the time of the great dinosaur die off from an asteroid hitting in the Gulf of Mexico 65 million years ago. I wonder which happened 1st, the die off or the landslides, or were the slides caused by the asteroid?
Hi, Dr. Patrich, could you please link the map you used in the Physiographic Provinces? Thank you.
Of course! geologyCafe.com has some incredible resources! geologycafe.com/physiographic/provinces.htm
8:50... Do I notice it? You can't miss it... Upheaval everywhere, I can drive my car INSIDE of San Andreas Fault.
❤ thank you
You're welcome 😊
Question, do the Mississippian & Pennsylvanian epochs have the same names in Europe or China?
This is a great question, and honestly, one I didn't really think much about. The short answer is.... o, the Pennsylvanian epoch does not have the same names in Europe or China. In Europe, the Pennsylvanian epoch is called the Stephanian, and in China, it is called the Upper Carboniferous.
The Pennsylvanian epoch is the last epoch of the Carboniferous Period, which lasted from 323.2 to 298.9 million years ago. It is named after the state of Pennsylvania, where the rocks of this epoch were first studied.
The Stephanian is the equivalent of the Pennsylvanian in Europe. It is named after the St. Stephen's coal mine in France, where the rocks of this epoch were first studied.
The Upper Carboniferous is the equivalent of the Pennsylvanian in China. It is named after the fact that the rocks of this epoch are found in the upper part of the Carboniferous System in China.
The different names for the Pennsylvanian epoch reflect the different ways that geologists in different parts of the world have divided up the geological timescale.
31:38 Are we sure that the Laramide Orogeny occurred because the Farallon plate dipped beneath North America? Or was it caused by the formation of the Atlantic Ocean pushing North America westward over a subcontinent?
The North American plate is moving Southwest, not West. As far as “upward”, did you mean North or did you mean “uplifted”?
Thanks for your comment- we are somewhere in the middle. According to the USGS the North American Plate is moving West-Southwest- the primary direction being west. As for "upward" I am reviewing my video, as I am not sure of the context- but will get back to you once I find it!
Pretty complex
It is- and this was just a quickie video!
Drive the PCH ! From sunset cliffs 92107 to shelter Cove King's range Humboldt County ! Bring your favorite girl.. Favorite surfboard and best bud doggie
Sounds like an excellent weekend trip!
@@Jeremy.Patrich the surfboard turns it a week !
Needles- Sunset Cliffs
San onofre trail #3
Trestles San clemente
Malibu by the pier
Rincon
Random spots from Santa Barbara to monterey
Pleasure point /18th street Santa Cruz
Chart house half moon bay
The other ocean beach
Stinson
Lost coast
Shelter cove Humbo
!
I wish there was someplace better to live than california
Me too- but all in all... California is the best!
wow
RIGHT?!
I suggest watching videos by Nick Zentner so you get 100% accurate information. There were many inaccuracies here.
Thanks! I wish you could provide me a list of these inaccuracies so I can fix it email me at californiageographer@gmail.com.
I love Nick
This is my first time with this video
I love geology- just forget most I “learn” ….
Nick got me to tour Ice age flood area twice !!
I appreciate your kind words! I hope you enjoy some of the other lectures shared from this playlist for my Geography of California course !
1 teeny error: Montana is part of the Wyoming Craton which is by far one of the oldest parts of North America. You can definitely touch rocks older than 1 billion years there. Other than that, I thought your presentation was very accurate and your excitement for the material is palpable, which makes learning fun!
Great job, thank you for making this available for free for all the prospective rock nerds out there!
#sedimentry #geology #geologist #sediment #mardavij #lake #crowley #river #mono #stonecolumns #ash #cross #california #usa #us #columns #mammoth #unitedstates #crowleylake #owens #deposition #bedding #bataviaexim #delta #available #woven #furnishings #cenozoic #furnishing #bhfyp
Thats kinda creepy...
Please turn the music off! It's distracting.
Thanks for the feedback, and I will do better in the future!
You moved that billion year old rock , but , perhaps it wanted you to move it.
Right? Who knows, I might have helped it along its journey of both physical and chemical erosion. lol
Shave some of your sentences down. 6 minute intro🙄
I know! Its because I use these lectures in my College level courses, so I have to cover my bases- which is where the Chapter Content on RUclips comes in handy so you can skip to the part you wanna watch!
ruclips.net/video/xJ0zMvstKYk/видео.html
I don't want to have to hear stupid music while listening to someone lecture.
I completely understand- some people prefer it- some hate it!