Māngere Mountain Geology
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- Опубликовано: 15 сен 2024
- Bruce Hayward takes us on a guided tour of the awesome geology and history of Māngere Mountain / Te Pane o Mataoho, one of the best preserved volcanic cones of Auckland, NZ
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Supporting volcano footage thanks to
Making Movies, Auckland
Geoff Mackley NZ
Gylfi Gylfason, Anoop A Nair, Martin Sanchez (Pexels video creators)
I really look forward to these videos and learning things about NZ!
Glad to hear it!
This really is exciting stuff to learn about our own back yard. Thanks so much
Our pleasure!
That was very interesting thank you. You have a great style, contagious enthusiasm!
🙂
oh thank you so much for doing these videos, especially of Tamaki Makaurau (auckland) history/geology
Cheers!
Thanks for this video. As always, this and the others are so interesting and informative, with great explanations and photography. I look forward to these videos, so thanks again for sharing your knowledge and expertise.
Thank you!
Excellent as usual
Thank you - very kind
Fantastic explanation, thanks!
Thank you
Thank you
Great video!
I've always loved Auckland's volcanoes, especially Mt Eden and Rangitoto!
I"ve never been to Mangere Mountain but would love to go there!
Waaay back in the '80s at Victoria University, I had Dr (now Prof, I think) Jim Cole as a lecturer in volcanology - he was awesome!
Had lots of great stories about volcanoes! I think he's down at the University of Canterbury now.
Thanks for your appreciation!
On the irregular height of the crater rim: From watching the Iceland vulcanos, partial rim collapses are common. Rather than the high points having been built exceptionally high, could it be the case that that height was fairly typical, but other parts of the rim suffered a collapse?
Translation (from about 2:00) for non New Zealanders: "Kumara" means "sweet potato". Translation for some New Zealanders: ""kumara" means "sweet potato". (Hey, I was 10 before I found out that "kumara" meant anything other than "kumara".)
On the quarried scoria cones: I used to live on the site of one of the entirely removed cones. (Mt Cambria/Takararo.)
Both explanations apply. Some parts are higher because of wind-directed scoria fountains and some parts may be lower because lava has flowed out through the scoria and the rampart has collapsed in or some has been rafted away. I believe all these explanations apply to various parts of this volcano.
Fair point - it is a mixture of both
:Sweet potato" means "kumara". By the way, In Peru (believed to be the source of kumara) it is called camote.
@@gibbogle Polynesians came out of Taiwan and spread across the Pacific, taking kumara, dogs, rats and chickens with them. While there is some speculation that they eventually reached South America, I don't think there is any doubt that they had kumara before this (allegedly) happened. So I think at best you're looking at a late introgression of South American kumara genes into the Polynesian kumara.
I've actually attended conference talks on the genetics of kumara and gourds across the Pacific and South America, but alas I don't remember the conclusion.
Really interesting to watch thanks, having lived in Auckland and worked near Mangere Mountain for years. Laurie 😅😊
Thanks for your comment
Another fantastic video to share with my family. Thank you.
Cheers!
Another fascinating video, thanks for sharing
Cheers!
Very interesting, thanks for sharing 👍
Thanks for watching
Thanks, quite a while ago !
Wonderful. I love Mangere Mountain, and I'll enjoy it more now.
Great!
Thank you for interesting videos. Makes me more interested to visit Auckland n see those craters. If I'm fortunate enough to afford the travel.
But for now, watching your videos would be sufficient enough to learn about Auckland n NZ in general.
Keep up the good work m stay safe always 🙏🏽🙏🏽🙏🏽
Hugzzz n Love from Bali ❤❤❤
@@chezzydibali6311 cheers!
This is fascinating! Just finished the Rangitoto one before watching this video.
Thanks for watching!
Excellent video. Nice to know I was rather accurate in my guesses about the areas formation.
Great!
20 years ago I spent a few months preparing a detailed contour plan of Mt Eden and Mt Wellington volcanic cones for archaeological purposes. Every feature on these volcanoes were surveyed,terraces,pits,trees along with heights to form the detailed contour model of the entire mountain. This was during winter with many days like the day you had in this video.
Thanks for your comment. I expect that these days that would be done using a camera drone in half a day!
What was the Mt. Eden one for, and do you know if we can we see a published map anywhere? There are a couple of Mount Wellington ones online and in books, and one day I printed off a couple and walked around the mountain comparing them (quite fun), so it would be cool to do it with the Mt. Eden ones as well.
@@calebmurphy4089 Just looked online and there is nothing obvious which is a shame as they were very detailed. The plans were a topographical survey that were for archaeological purposes. Survey was done for Auckland Council through their archeologist.
who are Moori? Ive heard of Maori but never heard of Moori
Nice one
Thanks!
Great video, lots of interesting information. Thanks for sharing.
Cheers!
Another brilliant video. Thanks!
@@morganlefey thank you, appreciated!
Excellent , beautiful looking mountain. Very interesting explanation of the history of the mounttain. Nice lava bombs. How old is it, when did the eruption happen ?
About 50,000 years ago, cheers.
Thank you "Out There Learning". Really enjoying this virtual tour series of the Auckland volcanic field! Can I put in a request for a tour of Corromandel - especially Mt Maunganui, Tuhua (Obsidian) Island & the "singing" silica sands North of Tauranga please.
Thanks for your comment. Can put your suggestions on the list, which is quite long already!
@@OutThereLearning"Out There Learning" channel is worth waiting for! Always excited to see an upload from OTL, no matter what the subject is! 😌
Really interesting, huge thanks. We need you to come down to Wellington and tell us the history of our hills!
Perhaps this video will be a start? ruclips.net/video/z13tAcSYVdo/видео.htmlsi=2-8Rbu0UpKjXcBFp
Good work, interesting and informative
@@geofflewis8599 thanks!
@@OutThereLearning ..What would be interesting, given the attention to 'climate change' - is the geologic history of the Firth of Thames, in particular the Kaiawa-Miranda area..in relation to sea-level rises and falls..
Well done, cheers.
Thanks
so cool
Glad you think so!
Is there any reason nobody ever talks about the volcanic craters in Pukekohe .. as they are very large and obvious, also they never seem to be included in the list of Volcanos in Auckland .. Pukekohe is apart of Auckland?
The Auckland Volcanic Field has erupted between 200000 years ago and today. The separate South Auckland Volcanic Field (incl Pukekohe) is extinct and all eruptions occurred between 1.5 and 0.5 myrs ago
Settlers grew horticulture and agrivulture there also.
All the market gardens from there.😊
Yes the rich volcanic soils developed on the surrounding lava flow fields were used for centuries for growing crops from earliest Polynesian colonists through to the 1960s or so.
Loving these videos. Could you do a video of the Alexandra aliment by Te Awamutu? Tokanui, Te Kawa, Kakepuku, Pirongia and Mt Karioi volcanoes are in a straight line which fascinated me since I was a kid.
Not sure, but it can go on the list of possibilities!
Can you please go to Mount Maunganui, looking at Mauao, Mount Drury, and "Leisure Island". I'm really interested in the volcanic geology in the area and how it got to looking like it does today.
Thanks for your request - will put it on the list of possible future options for if / when next in the area.
Seems very similar to the currently active volcanoes in Iceland....
Not too different. Similar basalt magma
How long would a cone of that size take to form? Was it built in a single eruption or over several eruptive episodes?
Each of the Auckland volcanoes was formed by one main eruptive episode lasting weeks to months or possibly up to several years in some cases. None of them have entered a second eruptive phase after a long period of dormancy as far as is known.
So in the case of Māngere Mountain we can guess it will have been a minimum of a few months of a single eruptive episode to build this relatively substantial cone and surrounding lava fields
Should be named Volcano City
What did they quarry the scoria for?
Were there any valuable deposits in there, or was it just for soil, like earthen fill?
Thanks!
The scoria is a bit denser than pumice and is very light for a rock, so easy to transport,and very good for drainage as water flows right through it. Where the soils in Auckland are not volcanic, they are usually a heavy clay so the scoria is very useful for drainage. Back in the 70s chunks about the size of a melon were fashioned into decorative exterior walls. My dad made some and I thought we were the height of cool.
Mainlky for quick draining fill and in the early days for roads.
How many million years before the Auckland volcanic cycle re-emerges?
It is is still an active volcanic field, with eruptions spaced hundreds to thousands of years apart. It is not clear when the next future eruption will happen.
🙂
Do the names maisie and lorry mean anything to you
Hey I can see my house 😆
🙂
Prettt sure they are still quarrying at three kings
That was stopped a few years ago and now the hole is being developed with apartments and fields.
@@BruceHayward1 Awesome that's good to hear
Great video. Just one recommendation , it would be nice if he learned to pronounce the maori vowels correctly. It hurts my ears to hear Maangeri and Moori 😢
Thank you for your feedback. Cheers