It's not apparent now, but Lake Elsinore once drained into the Santa Ana River through Temescal Canyon. Lake Elsinore lies on the San Jacinto River, which at one time (1800s) was the connection to the Santa Ana River. I'm not sure how much of a "lake" existed then. The water level in the current lake is maintained by groundwater pumped from below the lake.
I recently moved to Corona, from Northern California. I knew every mountain up there, but I'm lost down here. I appreciate this so much, as I wasn't exactly sure what I was looking at. Now I can teach my kids!
Thank you for this great field trip! Love learning about the Peninsula Ranges and Transverse Range. I remember admiring so much granitic rock while hiking the PCT in So Cal and wishing I'd been able to carry a guide book w/me. Learning now thanks to you and figuring out resources to look into.
So informative, with subtle details you present that make sense in the big picture. You have a gift for presentation that is inspiring. Thank you from England.
I really enjoy your filming style. You really take the time in details and transitions. You do a great job of keeping the audio even when switching from voice over to field audio. Really impressed, great job! Loved it.
I forgot if you already did a show on the fragments of columnar basalt on Burro Mesa (Santa Rosa plateau/south santa ana mountains)? Also have you checked out the interesting rocks in Hot Springs Canyon off of 74 (if coming from the coast and heading east on 74, turn left at the firestation down hot springs canyon road). There are some very interesting rock formations back there. Layers of rock that look crumpled onto each other. I'm not sure what they are, but that area is very neat from a geology perspective.
Interesting Geology, possibly explore a discussion of shallow and steep subduction plates which affects the various rock types? enjoyed the pyroxene minerals, maybe take time and explore the 87 93 degree cleavage? For example,Help the audience, how did you know that was Augite? Enjoyed the video, good job
I think I found my favorite channel. I appreciate how you explain the how's and why's. Endlessly fascinating listening to your knowledge about geology and lithology. The fact that you have Stick Figure playing in the background really just seals the deal. Maybe it's because I'm from Riverside and your content is locally relatable. Then again maybe it's just that I relate to your content in every aspect. At any rate I'm definitely subscribing and who knows if your around the Jurupa area I can show you some great pegmatite locations with some very good quality tourmalinated smoky quartz, sprays of green epidote, and dichroic grossular garnets from brown red to green. All of which are just hidden right in plain sight. My girlfriend and I go at least once a week to rock hound in one of three locations. You are invited because I deem you worthy of knowing these locations. Peace thanks for making smiles on faces!
Very interesting content. The melting point of the gabro is higher than the temperature of the tonalitic magma thus the gabro xenoliths survived within the magma chamber. Also the gabro xenoliths probably got cooked during the process and a hard, refractory aureola may have been developed precluding them from melting. Also this probably explains the diferential erosion seen nowadays.
I'm using slowly as a relative term. From what I've studied, no one really knows the exact cooling rates in terms of actual time, but a magma that cools and crystallizes deep underground is going to be well insulated and will cool slowly compared to, let's say, a lava flow at the surface or even another magma body closer to the surface. So mineral grain sizes of the rock is a good indicator if a magma cooled relatively quickly or slowly. So if you see very small mineral grain sizes (or even glass) then you can make the assumption the magma/lava cooled relatively quickly; however, if the mineral grain sizes are very large you can make the assumption the magma cooled relatively slowly (or in some cases high-water content within the magma can accelerate mineral growth, as in the case of a pegmatite, for example).
That's a great question! I was wondering the same as you'd think it would be the opposite. I wish I had a clear answer for that. Not all the tonalite in the area is decomposing like this; this specific outcrop is literally at the peak, getting inundated from all sides by sun and weather. The only thing I could guess is the difference in mineral grain size of the two rocks. The tonalite mineral grain size is very large whereas the gabbro was more compact. Perhaps water can more easily weather in between the large grains. Also perhaps the gabbro xenoliths have been protected by the tonalite they're residing in? I'm unsure, but it's fascinating.
Fantastic, informative and entertaining video. Takes me back to when I took a bunch of geology classes in college. Such good times!
Thanks!
It's not apparent now, but Lake Elsinore once drained into the Santa Ana River through Temescal Canyon. Lake Elsinore lies on the San Jacinto River, which at one time (1800s) was the connection to the Santa Ana River. I'm not sure how much of a "lake" existed then. The water level in the current lake is maintained by groundwater pumped from below the lake.
I love hiking and geology, so I wish I had more of your videos about these areas that I hike. Would be great if you gave geology hiking tours!
I recently moved to Corona, from Northern California. I knew every mountain up there, but I'm lost down here. I appreciate this so much, as I wasn't exactly sure what I was looking at. Now I can teach my kids!
That was fun! Thanks for posting.
Glad you enjoyed it!
Thank you for this great field trip! Love learning about the Peninsula Ranges and Transverse Range. I remember admiring so much granitic rock while hiking the PCT in So Cal and wishing I'd been able to carry a guide book w/me. Learning now thanks to you and figuring out resources to look into.
Glad you enjoyed it!
Excellent job, G.S. Your explanations are very clear. You are my N. Zentner for S. California.
Thanks Lorraine! Now THAT'S a nice compliment. 😊
Also thank you for this super informative piece of the Santa Ana mountains!
So informative, with subtle details you present that make sense in the big picture. You have a gift for presentation that is inspiring. Thank you from England.
Wow, thank you!
I really enjoy your filming style. You really take the time in details and transitions. You do a great job of keeping the audio even when switching from voice over to field audio. Really impressed, great job! Loved it.
Love your presentation. Wish I still lived down there to see for myself.
Thanks for watching! If you're ever in the neighborhood I assure you they'll still be here. 😁
Thanks.
Thanks for watching Craig.
Love these videos, thank you so much!!
Very cool. Really informative and interesting!
This video is excellent, thank you Sir.
This is a great video to help us understand more about the amazing landscapes of Southern California! Bravo!
I forgot if you already did a show on the fragments of columnar basalt on Burro Mesa (Santa Rosa plateau/south santa ana mountains)? Also have you checked out the interesting rocks in Hot Springs Canyon off of 74 (if coming from the coast and heading east on 74, turn left at the firestation down hot springs canyon road). There are some very interesting rock formations back there. Layers of rock that look crumpled onto each other. I'm not sure what they are, but that area is very neat from a geology perspective.
Interesting Geology, possibly explore a discussion of shallow and steep subduction plates which affects the various rock types?
enjoyed the pyroxene minerals, maybe take time and explore the 87 93 degree cleavage? For example,Help the audience, how did you know that was Augite? Enjoyed the video, good job
Thanks for watching and the feedback.
great video! you got yourself another sub. look forward to many more! :D
Love it!!! Interesting story... thanks.
Glad you enjoyed it
I think I found my favorite channel. I appreciate how you explain the how's and why's. Endlessly fascinating listening to your knowledge about geology and lithology. The fact that you have Stick Figure playing in the background really just seals the deal. Maybe it's because I'm from Riverside and your content is locally relatable. Then again maybe it's just that I relate to your content in every aspect. At any rate I'm definitely subscribing and who knows if your around the Jurupa area I can show you some great pegmatite locations with some very good quality tourmalinated smoky quartz, sprays of green epidote, and dichroic grossular garnets from brown red to green. All of which are just hidden right in plain sight. My girlfriend and I go at least once a week to rock hound in one of three locations. You are invited because I deem you worthy of knowing these locations. Peace thanks for making smiles on faces!
Excellent video Todd!! Thanks!
Glad you liked it Dan!
Palmdale is north of the SAN GABRIEL mountains. The San Bernardino Mountains are east of the Cajon Pass (I-15)
Yes, I made an annotation correction.
Very cool
Too good. Ty
Love all your videos...thanks. What book did you reference from?
Love your channel and desperately looking for good literature. Could you please share some of your resources for Southern California
Definitely taking mental notes here. Entire CA geology is a mish-mash of all kinds of geological eras - and it isnt all uniformitarianism.
Very interesting content. The melting point of the gabro is higher than the temperature of the tonalitic magma thus the gabro xenoliths survived within the magma chamber. Also the gabro xenoliths probably got cooked during the process and a hard, refractory aureola may have been developed precluding them from melting. Also this probably explains the diferential erosion seen nowadays.
This is excellent. Thank you and I agree with you.
What is the name of the book you are using?
You might can start to carry a spray bottle of acetone and natural fiber brush to wipe off the graffiti.
when you say it cooled slowly… how slow are you referring to,?
I'm using slowly as a relative term. From what I've studied, no one really knows the exact cooling rates in terms of actual time, but a magma that cools and crystallizes deep underground is going to be well insulated and will cool slowly compared to, let's say, a lava flow at the surface or even another magma body closer to the surface. So mineral grain sizes of the rock is a good indicator if a magma cooled relatively quickly or slowly. So if you see very small mineral grain sizes (or even glass) then you can make the assumption the magma/lava cooled relatively quickly; however, if the mineral grain sizes are very large you can make the assumption the magma cooled relatively slowly (or in some cases high-water content within the magma can accelerate mineral growth, as in the case of a pegmatite, for example).
Can you do a video on the geological forces that influenced the california mother lode?
Why did tonalite erode faster than the gab bro?
That's a great question! I was wondering the same as you'd think it would be the opposite. I wish I had a clear answer for that. Not all the tonalite in the area is decomposing like this; this specific outcrop is literally at the peak, getting inundated from all sides by sun and weather. The only thing I could guess is the difference in mineral grain size of the two rocks. The tonalite mineral grain size is very large whereas the gabbro was more compact. Perhaps water can more easily weather in between the large grains. Also perhaps the gabbro xenoliths have been protected by the tonalite they're residing in? I'm unsure, but it's fascinating.
@@geologicallyspeaking Thanks for the explanation. Sounds pretty plausible to me. Great video.
Nice tours but please turn the music down
map needs some color grellow.