Geology Johnson

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@mikeepperly5970 2 күн бұрын

Gleaning so much from your videos! Thanks so much! I haven’t seen all of your videos yet so don’t know if you covered this, but interested in the conversion of carbonates to silicates e.g. calcite/limestone/dolomite to wollastonite. Does the same process affect other carbonates? What are the resulting minerals? And WHERE CAN I FIND THEM?!?! Haha Truly grateful for the content you are creating - keep it up!

@edgeeffect 9 күн бұрын

I've got a chunk of what looks like Scottish mica schist that I found all the way down south on Brighton beach. I've often wondered if it could have got there by some natural process or if it was just dropped there by a human.

@geologyjohnson7700 8 күн бұрын

Could be both. I'm not sure if the glaciers got that far south. May have also come from Cornwall too. There's even a bit of schist in western Devon around the Start peninsular.

@edgeeffect 8 күн бұрын

@@geologyjohnson7700Devon or Cornwall do sound a lot more likely than The Western Isles... much less of an arduous journey. :)

@geolyn 9 күн бұрын

Missed you! I had no idea Redcar was so interesting.....

@geologyjohnson7700 8 күн бұрын

Thanks. It's a pretty neat place. You can get fish & chips and an ice cream, then have a quiet stroll and look at the fossils.

@geolyn 8 күн бұрын

@@geologyjohnson7700 Bliss! 😁

@saramiddleton9094 10 күн бұрын

Crinoids 😍

@geologyjohnson7700 10 күн бұрын

I have those samples in my collection still.

@DeeDurand-wm4sf 10 күн бұрын

Hello from shoshone Wyoming . New sub , 65 years loveing all kinds of rocks . I have some world class adventurine , close related to feldspar , isnt it ?

@geologyjohnson7700 8 күн бұрын

Howdy! I'm not sure about adventurine, that one is new to me. I'll have to read about it.

@vedic374 11 күн бұрын

I have a basalt mines in india

@geologyjohnson7700 8 күн бұрын

Cool, are you near the Deccan traps?

@vedic374 11 күн бұрын

Thanks

@amadeus_k2466 12 күн бұрын

So Pyrite means anoxic conditions, doesn't it? But thinking about it, 3 billion years ago pretty everything was anoxic, wasn't it?

@geologyjohnson7700 8 күн бұрын

Yes, but also no! It's complicated because it could mean anoxic at the surface during deposition, anoxic in the mud after deposition but before burial, anoxic after burial when the mud turns to stone, anoxic later during a metamorphic or hydrothermal event. It can be tough to work out sometimes. As for the second part, as far as we know the surface probably had very low, to no free oxygen. But, there may have been oxygen on the seafloor if there were cyanobacteria around. But we don't even know about that at the moment, it's one of the things I am looking for!

@charlinex5186 14 күн бұрын

If you look at it through black UV light, the lines would be more clear. I also found one in southern Ontario, Canafa.😅

@geologyjohnson7700 8 күн бұрын

I tried UV light but there there was was no fluorescence on my samples. :(

@charleswilliams1966 15 күн бұрын

How much damage does an acid do to these pristine specimens ?

@geologyjohnson7700 8 күн бұрын

The minerals all get dissolved, but the acid does not affect the organic matter at all. We only dissolve 30g of rock though, so there is plenty left for other types of study.

@charleswilliams1966 8 күн бұрын

@@geologyjohnson7700 Wow. Excellent. I knew that you couldn’t afford to waste time on these experiments by destroying specimens. Now I know why/how. Thank you ❤️

@geologyjohnson7700 8 күн бұрын

@@charleswilliams1966 Sometimes we do have to destroy the samples to analyse them but we always learn a lot from those analysis.

@paulebberson4884 16 күн бұрын

Good to watch a real expert at work. I thought you had to go to Australia to see Stromatolites and here is one at the end of the street! Reconstructing past environments from the rock evidence is fascinating.

@geologyjohnson7700 8 күн бұрын

I hindsight, I might have got that wrong, and it may be a really weird type of coral. It's still a fantastic outcrop though. There are stroms in the late triassic of Dorset and along the Severn estuary. There are some really nice Carboniferous ones in Scotland, and some Proterozoic ones on the Isle of Jura too.

@pianotime8652 17 күн бұрын

I'm not geologist. But it was very interesting and informative video. Thank you for sharing. We learn something new every day !

@geologyjohnson7700 8 күн бұрын

Glad you enjoyed it!

@geolyn 18 күн бұрын

Not for the squeamish, then.......

@geologyjohnson7700 8 күн бұрын

Yeah, probs not ideal if you don't like arachnids.

@edgeeffect 24 күн бұрын

Now I've become fixated on the bacteria in your armpit, I'm finding it difficult to move on. ;) My favourites are the "Boring Billion" and the Cryogenian.... oh, and The Ediacaran.

@lisadee8797 25 күн бұрын

Thank you, that was very informative.

@geologyjohnson7700 8 күн бұрын

I am glad you think so!

@davidgrossman6892 26 күн бұрын

FELSIC MAVIC K-SPAR ROCKCO

@JohnDrinkwater-dw6vl 27 күн бұрын

We found this at a site in Lichfield National Park, Rum Jungle, Northern Territory, AUS. We were told it is also mined there. They have a comprehensive shop where there are multiple finished items available or you can buy some unworked stone - take it home and work it with your small angle grinder and wet'n'dry paper. All very interesting.

@geologyjohnson7700 8 күн бұрын

Very cool, I had no idea it was all the way over there. My PhD was on the McArthur Basin so I know the geology of that area a bit. I found stuff that looks like Zebra Rock in the mid-Proterozoic stuff I studied in drill core from around Katherine and the Roper River. Found stuff like it too in archean age rocks from South Africa.

@JohnDrinkwater-dw6vl 8 күн бұрын

@@geologyjohnson7700 Thank you. Very interesting.

@leduke79 Ай бұрын

What a candy store this must be for someone with your knowhow.

@geologyjohnson7700 8 күн бұрын

We all got very excited!

@CepedaAlonso Ай бұрын

Amazing!

@geologyjohnson7700 8 күн бұрын

Glad you think so too.

@Fenestra_M Ай бұрын

Thank you--real good. I wish I lived nearer our nearest granite massive area where the feldspars can be 10 cms long

@geologyjohnson7700 8 күн бұрын

Wow, those are some hefty feldspars!

@hagnag Ай бұрын

Is there not a worry of ancient pathogens with organic material?

@geologyjohnson7700 8 күн бұрын

No, any living material has long been destroyed. Proteins can't survive typical geological processes and get broken down pretty quickly. We also process this material with very strong acids so the chances of anything surviving are pretty slim. This organic matter is inert hydrocarbons so it's pretty safe as long as you don't eat it or breath it in.

@edgeeffect Ай бұрын

My online geology dad!

@geologyjohnson7700 8 күн бұрын

😂 lol!

@edgeeffect Ай бұрын

I've always wondered why my lump of Ben Nevis was pink but my pellets of Dartmor where white... but I think I was throwing a sickie when we did feldspar at school. :)

@geologyjohnson7700 8 күн бұрын

Even I find feldspars a bit of a struggle sometimes. ;)

@jasonloveday1192 Ай бұрын

I am fairly sure basalt does NOT form obsidian. Obsidian comes from felsic lava?

@geologyjohnson7700 8 күн бұрын

Obsidian forms from mafic lava that cools too quickly to crystalize. The felsic equivalent of obsidian is called Pitchstone.

@jasonloveday1192 8 күн бұрын

@@geologyjohnson7700 I googled the question. Wikipedia says obsidian forms from felsic lava. Also encyclopaedia Britannica says "Obsidian is extremely rich in silica (about 65 to 80 percent), is low in water, and has a chemical composition similar to rhyolite. " Certainly rhyolite isn't mafic. Are these sources not accurate?

@geologyjohnson7700 8 күн бұрын

@@jasonloveday1192 That doesn't match what I've been taught but I'll have a read of those articles and check with my volcano colleagues. I'll do an update video with the answer either way.

@jasonloveday1192 8 күн бұрын

@@geologyjohnson7700 that's great that you'll investigate. Cheers. I'm getting more into the subject of geology and look forward to anything you find.

@geologyjohnson7700 4 күн бұрын

@@jasonloveday1192 Looks like you were right. Obsidian is a felsic composition from a felsic melt. I'm trying to track down the source of why I thought obsidian was from mafic melts. I think I might have gotten it confused with the glassy rind of pillow basalts. But I will need to correct my basalt video asap. Well spotted!

@RabbiRoller Ай бұрын

How about faint gray streak test in stone

@geologyjohnson7700 8 күн бұрын

Could be, but you would need more evidence to be certain. It can be quite tricky.

@user-zj8fy4xe6i Ай бұрын

Love ya approach ya old dag. Rocks for dopey old buggas just like me

@geologyjohnson7700 8 күн бұрын

Glad you like it. This is how I explain it to myself when I am learning.

@roselightmoon Ай бұрын

I found an endocerid nautiloid today, one of my first finds! This explanation opened up a whole new world for me on what Nautiloids and Ammonites were like and how they evolved. Thank you for sharing all this knowledge!

@geologyjohnson7700 8 күн бұрын

Nice! Those are cool fossils. I'm glad the video was helpful.

@jcochamin Ай бұрын

Wow very interesting, I came across your video as I was doing research on zeolites before I purchase a “detox spray” that is zeolites mixed with pure water and it’s supposed to be used to remove metals from the body. Do you think zeolite is safe to digest?

@geologyjohnson7700 8 күн бұрын

I honestly don't know if zeolite is safe to eat as I am not a healthcare professional. I know zeolites are used in food manufacturing, and are sold as a 'wellness' treatment, but you have to be really careful that what you are buying is really what it says it is because the wellness industry is poorly regulated. Also be careful with 'pure' water. We use it in the lab but it's not safe to drink because it strips the metals and salts from your body and can make you ill.

@javiervalenzuela8284 Ай бұрын

You sound like you have no voice box and are trying to talk directly from the exhalation of your lungs.

@geologyjohnson7700 8 күн бұрын

🤔

@tonyerico1208 Ай бұрын

Dr Rocks , Thanks for the stellar clarification from a scientific POV. * just heard a recommendation for zeolite as a detox tool for heavy metals , in the human body. It was quite a puzzle for some who rely on religion more than science. ( old school carbon as a detox aid has worked for me) Not sure if liquid or powder is better for the metals to bind to .... I'll keep researching. Thanks for t hff e very informative video! *& just ignore the "small minded trolls/haters" who don't have a clue about how valuable data IS.... I went to TX A&M @ Galveston in the geological lab with graduate students; was a great experience...until Hurricane IKE in 08' messed up a lot of normalcies for many months. Keep on Rockin' in the Free World, Dr. Rocks!!! Cheers & always remember: "Adapt or Perish " .. U Rock !!!😅

@tanyaedwards4574 23 күн бұрын

I'm going to buy some powder and try it- I'm convinced that crystals are just pretty things to look at 😊

@geologyjohnson7700 8 күн бұрын

Thanks, glad you find my stuff useful!

@silverlake973 5 күн бұрын

@@tanyaedwards4574 Why would you assume that?

@jameswingert9596 Ай бұрын

'basalt is the second most boring rock on earth' 😂🤣😂

@geologyjohnson7700 8 күн бұрын

Don't tell the volcano people I said that! ;)

@jameswingert9596 8 күн бұрын

@@geologyjohnson7700 To their undying shame..they know. 🤣

@kellyearthrise2453 2 ай бұрын

Cool, bringing the old old...old days to life!

@geologyjohnson7700 8 күн бұрын

So ooooold it might as well be another planet.

@GabrielMercier-ue9gs 2 ай бұрын

Fantastico video if it weren't for the obnoxious background music. THANKS

@geologyjohnson7700 8 күн бұрын

😅

@michaelbrickett1046 2 ай бұрын

- Most astute. Thank-you, Sir.

@geologyjohnson7700 8 күн бұрын

Most welcome!

@xxTHExxABYSSxx 2 ай бұрын

Why do sandstones stick to my skin when my skin is moist and the stone is dry, but it wont stick if the stone is wet and my hand is dry?

@geologyjohnson7700 8 күн бұрын

My best guess is surface tension and capillary action causing the stone to stick to your skin because of the water being pulled up into all the tiny cracks and pores in the rock. When the rock is wet, all those pores are full so there is no suction. A similar thing happens with other porous stones including fossil bones.

@ytmusicacc101 2 ай бұрын

Love the info, but the music does not fit the geological subject. Feels like I'm raving

@geologyjohnson7700 8 күн бұрын

What music would fit geology? I'm still going to put the rave music in because that's what's in my head when I am doing geology.

@MelvinBandao-fu5jr 2 ай бұрын

Sir, is basalt rock has a melting fusion?

@geologyjohnson7700 8 күн бұрын

I'm not sure what this question means, can you try rephrasing it?

@HoboMinerals 2 ай бұрын

Why is quartz so absent in meteorites and abundant on Earth?

@geologyjohnson7700 8 күн бұрын

I don't know. I'll have to ask one of my colleagues who studies meteors. If I had to guess, it's because most meteors come from the core and mantle of a rocky planet that was destroyed in the early solar system, these areas are usually relatively poor in silica so quartz cannot form. Most quartz is from the crust of rocky planets which is relatively rich in silica.

@HoboMinerals 8 күн бұрын

@@geologyjohnson7700 well, all differentiated planets seem to be rich in silicates, but not quartz, that’s what I’m wondering about… I’m into ALL rocks..

@cosmo1eleven855 2 ай бұрын

Poor audio sound and Aussie accent hard to decipher

@geologyjohnson7700 8 күн бұрын

I'm not Australian. 😂

@Mr.agate2 2 ай бұрын

❤❤❤❤

@elijahsahay9556 2 ай бұрын

do zeolite reacts with hcl?

@geologyjohnson7700 8 күн бұрын

Yes but I don't know how vigorous the reaction is.

@martynm.449 2 ай бұрын

I'm from Cornwall. We have granite everywhere. I've found a nice looking lump that has brassy/golden shiny bits in it. I'm trying to work out what it is. Well... I thought it was granite, but who knows?

@geologyjohnson7700 8 күн бұрын

Brassy golden shiny bits could be pyrite, copper, or phlogopite. All of white can be found in and around cornish granites.

@WilliamBusuttil 2 ай бұрын

Maps please,

@geologyjohnson7700 8 күн бұрын

Maps?

@RichardLank-lq2po 2 ай бұрын

we have a small mountain which has lot of quartz crystals , mostly the size of 2 inches for indicidual crystal and a foot with when they are all together, any suggestions as to if there was any volcanic activity nearby ? just want to know so that i can avoid falling in volcanic tubes if any , enjoying current crystal hunt . also want to know how these are formed ?

@geologyjohnson7700 8 күн бұрын

Sounds interesting. Where in the word is your mountain? Context is really important for this sort of thing. :)

@drillhex4471 3 ай бұрын

I really don't get why these rocks aren't more popular. I'm from the area and I've always found them mesmerising there's such a vast array of patterns in them. Kinda glad they aren't popular, though. Otherwise, there would be none left :')

@geologyjohnson7700 8 күн бұрын

So few people outside the NT know about them. I had never heard of them until I first saw them at Mindil Beach market.

@KittieMaeS 3 ай бұрын

My rock and mineral obsessed brain is on fire with the information in this video. 😅

@geologyjohnson7700 8 күн бұрын

That's my brain every day when I'm at the lab!

@KittieMaeS 3 ай бұрын

Hey there. Do you happen to have any knowledge of Isle Royale Greenstone? Or all the green metamorphic rocks of all stages around Lake Superior? I have some pieces I would be happy to send your way to study :)

@geologyjohnson7700 8 күн бұрын

I don't know much about those rocks. I'll have to have a read about them. :)

@fishing_rod 3 ай бұрын

Great information I find granite, marble, theirs one area crushed up granite pink in colour started find broken pieces of crystal it has two clevige plans ,cream in colour with green and yellow, white is it feldspar, and white quartzite, orange, pink, theirs a gold coloured as well luv work

@geologyjohnson7700 8 күн бұрын

That sounds like a really interesting geology spot!

@fishing_rod 3 ай бұрын

G'day really enjoying the information been out searching found egg shaped Basalt round boulders tennis ball size, soccer ball, cracked one open deep colbolt colour and slabs of Basalt some pieces I found Esky lid size 50mm to 100mm thick with 10mm holes straight through the basalt this place is a spur off the great didving range

@geologyjohnson7700 8 күн бұрын

That sounds really interesting. I've seen basalt weathering into round shapes but they were green not blue. I don't know much about the geology of the great dividing range though.

@jasonthompson5324 3 ай бұрын

Definitely check him out he’s a character and really knows his geology I always thought geologists were kinda like boring science teachers but I’ve learned there’s some really interesting geologists and Jeff’s right into it he’s hilarious

@geologyjohnson7700 8 күн бұрын

I'll look him up. I've had a few boring geology teachers in my time. ;)

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