Islands of Gold in an Ocean of Land - The Macquarie Arc 

Oh documentaries like this have become rare! Thank you for keeping it without hectic cuts and zooms and for keeping the camera steady, so pleasant to watch, i got pulled into the geologists enthusiasm by this interesting story!

And I thought it was going to be a story about slab plutons and shifting fault strike zones. Wow this is way better and cool thank you

I really appreciate your efforts Clive to pull all this together in such a clear exposition. Well done.

Excellent geo-history clearly and intrically explained, so very interesting. Thanks to all the team for their good work.

Without doubt the best series of documentaries I have seen, very well presented. Following the same format I Would love to see a series on how western australia evolved in such detail. Brillant......

Great video! Wish we had more videos like this for other parts of the world! Was great to "see" Dick Tosdal again after having spent some time in the field with him years ago!

Would be interesting to see a documentary on the Mount Isa north west Queensland area. Due to the vast amounts of minerals found there. Regards Rob.

Fantastic video! I have very much appreciated learning more about Australian Geology while watching them! Thanks a lot to all involved in there high quality production! Clive has a very clear and easy to listen to voice. Cheers from East Gippsland, Victoria

Very educated video, this explained that tectonic understanding will guide us how 's mineral district were form!

Now that has answered many of my questions, thanks heaps.

Rarely have I cried over a subduction plate compressing and deforming thanks to the locking of a plate boundary...

Geology was the only thing that kept me in school during my last 2 years of secondary, and the only final qualification i care about. I still care deeply about learning new things to this day, and take every chance i get to play with and try to understand the rocks i come across.

Thoroughly enjoyed this, easy to understand for us who are less informed. My husbands family used to own land in the volcanic rich area of Mt Canobalas and the Warrumbungles further west. He used to tell the story, in the down time on the property, there was always something to do, however all the boys hated the job of clearing the paddocks of rocks. If only he realised he was picking up the history of the making of Eastern Australia. Fascinating. Thank you.

Great work and an excellent production.

A great video! Accessible to the layperson yet interesting to a crusty, old, know-it-all geologist.

Excellent video, thanks. I came here after digesting Nick Zentner's 101 course and his other videos this year so now applying it to other places worldwide. Cheers.

Well done. Clive and Davide

Omg! I’m obsessed with this channel The last minute in the vid was so touching and beautiful 🤍🪨🌋

I really enjoyed this documentary, having just moved to NSW and having an amateur interest in geology.

I love learning about the country I see daily. Great video! I have a deep interest in rock formations. I really should’ve been a geologist.

Thank you so much for detailed information about mapping ,advance technology like survey of this type to identify ,faults ,earth quakes and potential resources . this is senior geologist directorate of ground water ,Karnataka state, India

this has to the next best thing from being there

What amazing and knowledgeable information thank you that was very informative

First class production. You're getting pretty good at this. A great note to finish on too. If you ever get a chance to do something on the Petermann Ranges, it would be something unique

Brilliantly explained. Great work.

Absolutely fascinating story. Thanks for putting it all together!

Brilliant, thank you, and yes important and yes fascinating. I've been trying to figure out NZ geologic hx, seems a bigger cf than even SE oz, but oh lovely portrayal/representation of that change from subduction to crushing ...add a late oceanic separation and then split it down the middle ...side slide and ...voila NZ!

Wonderful! Would love to visit from Florida.

Excellent production. Beautifully presented scenery and science a lay person can understand.

The take away for me is that not all subduction zones are the same. This video takes the trouble to explain some of the differences. This is the second decent science video from Down Under I've seen recently Makes a refreshing change from endless soap operas.

What a great video! Have always wanted to know more about the NSW/ East Coast geology and this has been very informative. Would love to know about a lot more areas on the east coast and Australia that aren't really written about or is hard to find information on.

I'm definitely going to visit there to investigate. I'm inspired by this unusual area

Yay you are back! I love your videos !

Love it.. sooo exciting. Thanks

Brilliant viewing. So much beautiful land, so undeniably worthy of much scientific discovery let's hope we find the missing information here we need to piece it together 💫🌋✨🤙

Very nice informative

Thank you. Explained beautifully.

Excellent doco, really interesting and well presented...

Fascinating geology, my appreciation !

Awesome video! Thanks for sharing!

Running around with a hand lens is one thing, but buffing specimens and getting infrared, Raman, and X-ray spectroscopy data on their minerals is more interesting and much more informative. Off hand, the crystals in gray lava look like anorthoclase feldspar. This is potassium feldspar.

This is a masterpiece! Accesible to a layperson but interesting enough for a geologist!

brilliant

Well done

Great video. Thoroughly enjoyed by a Brit recently moved to Queensland

"These are some of the oldest rocks, and they're quite unusual." Proceeds to belt it with a hammer...

Great video! I am a retired Geologist but do we really ever retire? LoL.

Thanks for this work. I live in the southern tablelands of NSW, surrounded by those ubiquitous folded seafloor sediments. I had the good luck to be on a geology tour with Dick Glenn regarding the Macquarie Arc back in 2014 and ideas about the fractured structure of the Macquarie Arc belts were still evolving at that time. I will check out your Vic films - they don't appear to be on your youtube channel.

Fantastic!

Yeah and no explanation why the subduction stopped. Well, the pictorial schematic is backwards. The Gondwana side slid over the subduction zone going eastward. It overran and consumed the subduction zone. The same thing occurred in North America where the North American plate moved fast to the west and overran the Pacific Subduction zone from San Francisco, southward, but not to the north. The changed into the San Andreas fault as plates started to slide against each other instead of override one or the other.

Excellent !!

Now I have to rethink the Cascades in the United States as a island chain just as you described here although it is already been overtaken by the North American plate. Maybe it's the fundamental fingerprint of the siletzia subduction event.

A very informative video.

Awesome!!!

Many years ago a scientist said a hot spot developed in Heard Island and gradually travelled to Tasmania and up the east coast of Australia and is now under Rabaul Harbour, it last erupted in 1994. What caused Gondwana to break up into the tectonic plates we have today. did another planet crash into Earth?

Aloha hugs 🤗 Gold dust is awesome for the mine I ate cake with I thought it was glitter wow O would like to see that.

i just found this late at night. very enjoyable. i have some questions. at 2:56, you say "no evidence of volcanic activity". of course there is lots of evidence of volcanic lava flows in victoria to the west of melbourne, scoria fields around colac and the red scoria mt fraser north of melbourne just east of the hume freeway. and at 12:57 your map shows sandstone all across victoria. there must be differences in the sandstone across this area because there were no sandstone deposits around melbourne suitable for the elaborate construction of banks and other buildings in the 19th century melbourne cbd. the sandstone that was sometimes used in these buildings came from sydney. at least some of the volcanics in western victoria are likely to be younger than the macquarie arcs. the western victorian aborigines have legends of active volcanoes. i have seen somewhere that there were hot spots deep below the surface that move relative to continental drift and that a volcano may appear in bass strait off the coast of warrnambool. your show raises the thought in my mind that the macquarte arcs in nsw may have a relationship with the concentration of gold into monster-sized nuggets that victoria was famous for and that there may be unknown deposits of copper.

6:30 in, still no idea why the Macquarie Arc is there. I'm sure this video will have the answer. Yet "Geology Films" are good at no letting-on at this point in the story, I'm sure if I keep watching I will find out. lol

Awesome Information and graphics. I want to learn more about Australia after always seeing overseas geology. Will you ever look at ACT to explain what features we have, even if it's short. :)

Played tectonics did not create those rocks. The came from the superplume blob that resides in the mantle transition zone (410-660km deep within the Earth).

what a great video. I would love to help film or edit more videos like this @geology films

Go Clive. Class geologist.

Did the Keweenaw Peninsula's Copper Country deposits form in the same way?

wonderful

628 likes in three years. What is wrong with the universe?🙁

Ancient tourist attraction volcano “Mt Warning” Northern NSW is to be closing the nature walks and the track to the peak of the Volcano ( first to see sunrise ) on the mainland. Taking all the fun away 😡

Has this been on the ABC? If not, it should be. Have you done one on the Australian Alps or how The Ditch was formed?

@18:20 Is this Red Symonds 🤔

Does this type of geology appear in other places? As far as I know where I live in El paso Texas was once under an inland sea

If the Himalayas, andies and other mountains and African content are being pushed up in on place something has to filling the space underneath and supplying the monumental force. Something somewhere has to move 🤔. Ocean's floors have to get deeper or something 🤔.

Your series have been very informative. I live in the Bailingup Chittering complex which is a highly deformed region on the south western Yilgarn. We have Bodington and Greenbushes and another structure currently being drilled by Venture minerals. They are intersecting VMS at around 200 m. On that magnetic anomoly is also Yornup with PGE occurrences. There is some sort of layered ultramafic. Recently I panned platinum along with gold from a decomposed ultramafic (green clay). Do you know why we do not have oregenic Gold? Cheers Andrew

What happened? Where are the new videos?

I guess by now youve been to Hopetoun western Australia where west area by the park by the cave has sloping rocks and lava splashes over them

As a Geologist , you must know where all the Gold is.😆

Are the Warrumbungle Ranges included in the Macquarie Arc? Or are they from a different volcanic event?

The only thing that I can nitpick on is that Australia isn't in the title, I only came across this video by chance and didn't know that it was about Australia until I heard the accent...

I knew that.

Excerpt gold is not reacting with sulphure...

6,000

Just see ur channel

This question is veering a little off subject, but can anyone answer for me: The Maori in New Zealand did nothing with gold that they must have come across while prospecting for their greenstone; they used greenstone for weapons, cutting tools and adornment. Did the aborigines in Australia ever do anything with gold, given, like NZ it was there for the taking.

well then wheres the giant mountain range??? sumpins wrong wit dis theory mate.

Guess work not science

Any chance of a film explaining how Uluṟu was flipped onto its side ? Cheers for a great channel

I have some videos I don't want much English but accompanied by. images to get an idea it would be good if it had in Portuguese dubbed or with subtitles

Great live footage and animation, with not only Aussies but a Cubana too- the patterns and poetry of geology! Watching this has helped me understand what I have seen on the other side of the Pacific rim, as well as along other older mountains on the east side of N. America. Poetic justice in the linkage between the gold rushes of California and Victoria, and now I'm dreaming about the flow patterns of our living planet.

I found this information easy to digest, thanks for explaining this in a way a simple concreter can understand

The geology of Australia is fascinating. Glad I found this.

FANTASTIC. Thank you. absolutely a wonderful and scientifically logical production. What a far cry from the crappola that are produced now a days, in America and Europe (to cater to their scientifically illiterate TV viewers). The only pitfall I found with this, is found @30-34, where the collision of Macquarie Arc with Gondwana/Australia is shown. Physically, that is untenable and logically an error: Heavy things do not ride on light things. Then the rest that follows becomes more of a fudge and wishful thinking, since it moves away from logic

Yeah, the Victorian Alps have a huge volcanic geological history stretching back to the Devonian.

Very interesting! Up here in the Pilbra we have some old rock billion of years old and there amazing to go and check out...

Any salt deposits there after the closing of the back arc sea?

Most enjoyable- thank you.

Many Thanks! It was very nice.

This would be one of the best films you will see explaining the geology of Eastern Australia. Like any film by Clive Willman this is valuable resource for anyone interested in Geoscience from professional geologist to a lay person. If you are interested in Gold in Victoria it is worth while seeing all the other films on this channel. Clive story telling will keep you engaged all the way and explains the latest geological models and evidence visually. It goes to show that even youtube has better content than National Geographic and Discovery Chanel. Thank you for creating this helpful resource.

Great work. Thanks

Interesting that the basalt with the white crystals appear to be exactly like what is found in Northern California. The local rockhounds call it Chinese writing stone as the crystals look somewhat like Chinese crystals.

Fantastic

These fantastic documentaries are really underappreciated, they are brilliant.

This was absolutely brilliant.