jrm30655 Posted July 11, 2017 Report Share Posted July 11, 2017 29 minutes ago, AngusMactavish said: Do us a favor and post a Googled link that says that lake Chapal is a caldera, please. this book will tell you more than you ever want to know about MX volcanos and fault lines https://books.google.com.mx/books?id=aQdlV8dal1UC&pg=PA164&lpg=PA164&dq=Los+Azufres+caudera&source=bl&ots=u9jtCjsAD_&sig=bXCNnGoHqjh1sL3UyJ3yLqRXLv8&hl=en&sa=X&ved=0ahUKEwi2neLAmILVAhXHcT4KHQH2BhY4ChDoAQhKMAg#v=onepage&q=Los Azufres caudera&f=false Link to comment Share on other sites More sharing options...
giltner68 Posted July 11, 2017 Report Share Posted July 11, 2017 Thanks Jim, looks interesting, I'm sure Angus will totally immerse himself in educating himself about MXN calderas. Link to comment Share on other sites More sharing options...
johanson Posted July 11, 2017 Report Share Posted July 11, 2017 Remember that Harry Truman died because he didn't move when he was warned of a chance on a volcanic eruption. Well according to a relative of his who retired south of the border, we had better heed the warnings at the East end of the Lake From Mr. Google Harry Truman who lived in Washington, near Spirit Lake came to brief fame in the months preceding a volcano's 1980 eruption after he stubbornly refused ... Wikipedia Born: October 30, 1896, Ivydale, Clay County, West Virginia, West Virginia, United States Died: May 18, 1980, Mount St. Helens, Washington, United States Link to comment Share on other sites More sharing options...
moderator-2 Posted July 11, 2017 Report Share Posted July 11, 2017 Your moderator has a "sinking" feeling this caldera argument isn't going to "collapse" soon. Carry on but be nice! Link to comment Share on other sites More sharing options...
RVGRINGO Posted July 11, 2017 Report Share Posted July 11, 2017 There is no argument; just facts that are not known to the average person on the street. Our planet is a rather violent place; with or without us. It has blown apart before, and has still managed to produce life again and again, after several major extinctions. We are now headed into another. The only unknown is which of the several scenarios will occur first. Time will tell; but we don‘t have any idea how much time it will take. Be patient. Link to comment Share on other sites More sharing options...
jrm30655 Posted July 11, 2017 Report Share Posted July 11, 2017 4 minutes ago, RVGRINGO said: There is no argument; just facts that are not known to the average person on the street. Our planet is a rather violent place; with or without us. It has blown apart before, and has still managed to produce life again and again, after several major extinctions. We are now headed into another. The only unknown is which of the several scenarios will occur first. Time will tell; but we don‘t have any idea how much time it will take. Be patient. No one has even mentioned asteroids. The big one that killed the dinosaurs landed in MX. There was a song that was the theme song for the series Highlander with the line "Who wants to live forever" A good asteroid hit with no warning sounds like a great way to go. I just hope I owe a lot of money on that day.......... Link to comment Share on other sites More sharing options...
gringohombre Posted July 11, 2017 Report Share Posted July 11, 2017 I am more concerted by N.Korea and all the nukes that could be unleashed when this madman decides to go out in a blaze of glory. Have a good day! Link to comment Share on other sites More sharing options...
jhark Posted July 11, 2017 Report Share Posted July 11, 2017 From http://geo-mexico.com/?p=14322 Update – 11 July 2017: Panic over! Geologists from UNAM have discounted the possibility that this is the birth of a new volcano and determined that this is a “geothermal fault” giving rise to a phenomenon that is more similar to the fumaroles found in some areas where volcanoes were previously active. The Lake Chapala area is part of Mexico’s Volcanic Axis which was very tectonically active millions of years ago. I remember reading some time ago (but can't find it now) that a caldera has no entry or exit for the water which would make Lake Chapala NOT a caldera. There are only 5 in Mexico. From Wikipedia: https://en.wikipedia.org/wiki/Caldera List of volcanic calderas Mexico Amealco Caldera (Querétaro) Las Cumbres Caldera (Veracruz-Puebla) Los Azufres Caldera (Michoacán) Los Humeros Caldera (Veracruz-Puebla) Mazahua Caldera (Mexico State) Link to comment Share on other sites More sharing options...
AngusMactavish Posted July 12, 2017 Author Report Share Posted July 12, 2017 2 hours ago, jrm30655 said: this book will tell you more than you ever want to know about MX volcanos and fault lines https://books.google.com.mx/books?id=aQdlV8dal1UC&pg=PA164&lpg=PA164&dq=Los+Azufres+caudera&source=bl&ots=u9jtCjsAD_&sig=bXCNnGoHqjh1sL3UyJ3yLqRXLv8&hl=en&sa=X&ved=0ahUKEwi2neLAmILVAhXHcT4KHQH2BhY4ChDoAQhKMAg#v=onepage&q=Los Azufres caudera&f=false I sure wish it says that the lake is a caldera, but it ain't. Please give us a link that says it is. All I see is that the lake is in a volcanic area. Link to comment Share on other sites More sharing options...
CHILLIN Posted July 12, 2017 Report Share Posted July 12, 2017 The only reason there are soldiers there is to protect the geosensors that the universities and government departments left there. Every crook knows they are probably worth thousand of pesos in the Guad black market. Link to comment Share on other sites More sharing options...
jrm30655 Posted July 12, 2017 Report Share Posted July 12, 2017 10 minutes ago, AngusMactavish said: I sure wish it says that the lake is a caldera, but it ain't. Please give us a link that says it is. All I see is that the lake is in a volcanic area. 47 minutes ago, jhark said: From http://geo-mexico.com/?p=14322 Update – 11 July 2017: Panic over! Geologists from UNAM have discounted the possibility that this is the birth of a new volcano and determined that this is a “geothermal fault” giving rise to a phenomenon that is more similar to the fumaroles found in some areas where volcanoes were previously active. The Lake Chapala area is part of Mexico’s Volcanic Axis which was very tectonically active millions of years ago. I remember reading some time ago (but can't find it now) that a caldera has no entry or exit for the water which would make Lake Chapala NOT a caldera. There are only 5 in Mexico. From Wikipedia: https://en.wikipedia.org/wiki/Caldera List of volcanic calderas Mexico Amealco Caldera (Querétaro) Las Cumbres Caldera (Veracruz-Puebla) Los Azufres Caldera (Michoacán) Los Humeros Caldera (Veracruz-Puebla) Mazahua Caldera (Mexico State) Lake Chapala is technically not a lake. I know it look like it but it might be more accurately called a pool in the river. The river comes in and goes out on the east side of the lake so the lake is technically part of the river against what you normally thing of as a river flowing through from east to west or vice versa. I've never seen anything else like this. Technically, a caudera is an extinct volcano pit and the lake bed of lake Chapala fits that description. At some point in the past. there was a heck of a big volcano here. If you look at the mountains around the lake, there are no real rock slabs in those mountains, just piles of stones tossed out by volcanoes. About 9-10 years ago, there was a rock slide out in the racket club area and I went to look. Most of the boulders were pretty much round, not sharp and they rolled through a couple of homes. That kind of stuff is volcanic. I live near the top of Villa Nova and there is a road cut through the hill one street up. I' went up and looked at that cut and it is almost all volcanic ash. Why it doesn't collapse is beyond me. I guess the tree roots hold everything in place. I'm betting that if it does shift, the houses above me will keep it from getting to my house. If you look at the cobblestones here, most are rounded. They got that way when they were blasted up in the air and came down like raindrops, cooling on the way. This is a most interesting place. Many oddities here. At one point the wall and the patio of the house I live in fell off and out into the street. There is no foundation and nothing but sand to build a foundation on here. Imagine taking a box of marbles, pouring in some sand and building on that as a foundation because that is basically what happens here. I look at these tall buildings going up and think "Not me baby". A good earthquake and no telling what will happen but probably not good. If you will check back in a few thousand years, you will find that Mother Nature has washed enough off the mountains and filled the lake with sand and stone. If you buy now, it will be a great long term investment. Link to comment Share on other sites More sharing options...
jrm30655 Posted July 12, 2017 Report Share Posted July 12, 2017 26 minutes ago, CHILLIN said: The only reason there are soldiers there is to protect the geosensors that the universities and government departments left there. Every crook knows they are probably worth thousand of pesos in the Guad black market. During WWII, the US sent a contingent of soldiers that camped on the west end of the lake. There were reports of strange flying things and the US was worried that the Germans were up to something. Great posting if you could get it. As far as I've read, short of some liver damage from excess beer drinking, nothing ever happened. Link to comment Share on other sites More sharing options...
alex45920 Posted July 12, 2017 Report Share Posted July 12, 2017 6 hours ago, moderator-2 said: Your moderator has a "sinking" feeling this caldera argument isn't going to "collapse" soon. Carry on but be nice! You'll be alright unless it leads to a "depression" of some sort. Link to comment Share on other sites More sharing options...
AngusMactavish Posted July 12, 2017 Author Report Share Posted July 12, 2017 I emailed Geo-Mexico and asked them, "Is Lake Chapala a caldera?" They promptly replied: No, it is in a rift valley - see How Lake Chapala, Mexico’s largest lake, was formed Calderas nearby include La Primavera (just west of Guadalajara) - The volcanic calderas of Mexico’s Volcanic Axis TB Link to comment Share on other sites More sharing options...
Mainecoons Posted July 12, 2017 Report Share Posted July 12, 2017 10 hours ago, alex45920 said: You'll be alright unless it leads to a "depression" of some sort. It's OK, looks like the discussion is "subsiding." Link to comment Share on other sites More sharing options...
Ferret Posted July 12, 2017 Report Share Posted July 12, 2017 Okay, so the panic is over and it's not a new volcano... http://geo-mexico.com/?p=14322&cpage=1#comment-916475 Quote Update – 11 July 2017: Panic over! Geologists from UNAM have discounted the possibility that this is the birth of a new volcano and determined that this is a “geothermal fault” giving rise to a phenomenon that is more similar to the fumaroles found in some areas where volcanoes were previously active. The Lake Chapala area is part of Mexico’s Volcanic Axis which was very tectonically active millions of years ago. Lots of ambiguity in the links... http://geo-mexico.com/?p=9437 Quote There is still lots of work needed to fully unravel the geological secrets of Mexico’s Volcanic Axis Quote Even so, there is still some debate among specialists as to the precise definition of the term caldera. Whatever... can we just agree that we live in a hot spot and what will be will be? Link to comment Share on other sites More sharing options...
Al Berca Posted July 12, 2017 Report Share Posted July 12, 2017 I was hoping Tony Burton, who wrote this article, would comment. He is an active poster on Face Book, but no longer on this board, I guess. Too bad, would have been very interested in his comments on this topic. Link to comment Share on other sites More sharing options...
AngusMactavish Posted July 12, 2017 Author Report Share Posted July 12, 2017 Tony Burton was the one, his initials are there, that answered the question of the lake being a caldera or not. Link to comment Share on other sites More sharing options...
johanson Posted July 12, 2017 Report Share Posted July 12, 2017 They will be installing a camera somewhere near the activity point once (if) it gets more active so we can watch future activity from home rather than out the window for those who live east of here. Link to comment Share on other sites More sharing options...
jrm30655 Posted July 12, 2017 Report Share Posted July 12, 2017 I sure hope that Mother Nature reads this and knows that the new hot spot is not the start of a new volcano. I've noticed that she has left the sprinklers on too late in the morning recently. She knows to cut off the rain by daybreak but keeps forgetting. Link to comment Share on other sites More sharing options...
El Menudo Posted July 12, 2017 Report Share Posted July 12, 2017 See, this is why we can't have nice things. Link to comment Share on other sites More sharing options...
Ferret Posted July 12, 2017 Report Share Posted July 12, 2017 44 minutes ago, jrm30655 said: I sure hope that Mother Nature reads this and knows that the new hot spot is not the start of a new volcano. I've noticed that she has left the sprinklers on too late in the morning recently. She knows to cut off the rain by daybreak but keeps forgetting. LOL! She's either going through the change and trying to have hot flashes or she's trying to make up for screwing up the rain delivery in June. There is nothing predictable about Mother Nature :) Link to comment Share on other sites More sharing options...
giltner68 Posted July 12, 2017 Report Share Posted July 12, 2017 Wow, when I lived there I realized I was living the middle of a bunch of old cranky people who no longer get their way in the business world etc. and so are determined to be experts in something - ANYTHING! So, who cares is if a caldera or a rift, or a ditch or a giant pothole that's filled with water? - I mean really, what difference does it make that someone can scratch a mark on his computer screen as "THE WINNER"? Get real people, I knew it when I lived there, but looking back into the fishbowl is really - - - well, really pathetic. I think if I were to return to MX I'd move to Acuna, I was there today and didn't see or hear a single crabby gringo determined to impose his opinion on anyone - it was refreshing, my kind of place, everyone smiled and was friendly. Link to comment Share on other sites More sharing options...
cedros Posted July 12, 2017 Report Share Posted July 12, 2017 A bunch of nonsense below: "Lake Chapala is technically not a lake. I know it look like it but it might be more accurately called a pool in the river. The river comes in and goes out on the east side of the lake so the lake is technically part of the river against what you normally thing of as a river flowing through from east to west or vice versa" By nonsense I mean doesn't make sense. Link to comment Share on other sites More sharing options...
AngusMactavish Posted July 12, 2017 Author Report Share Posted July 12, 2017 20 minutes ago, giltner68 said: So, who cares is if a caldera or a rift, or a ditch or a giant pothole that's filled with water? The aim was to correct wrong statements about the lake. If I called it a swamp, would it matter? Link to comment Share on other sites More sharing options...
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