Colorado Science: Researchers discover secret to Castle Rock's longevity 

That’s the most Colorado statement I’ve ever heard.

When the water faucet or water fountain on the other side of the room just won't do.

Glad we could help

A small spray bottle of water means I am not a Geologist

I liked it

If 1 of them had Hep B, they all have it now.

Yeah whatever. Pass the bowl, chump.

Could carry a damp cloth !?

@@justjane2070 let’s be honest here, seeing him rub it with a damp cloth wouldn’t be nearly as fun

thanks!

I would have went with "lasagna"

Then went and licked it.

I don't.

Spinel is main source of mercury!

That was a 500+ carat specimen easily.

> Spends 3 minutes hyping CO geology > Very first sample shown is Australian > 🤪

Thanks! That was my thought!

Disgusting, really, why put human bacteria all over it when plain water would have done the same.

748. I've done it.

tootsie rock*

Way fewer than to get to the opal in a conglomerate rock.

3

@@garyhenderson7334 Citation needed :D

Isn't it shown at 3:41?

@@curiosity19 - YES!

That’s called Colfax Avenue

You can visit. But please don’t stay. There’s too many people now I was born here

Technically the Rocky Mountains or not actually Rock, I would presume

Can you explain why he called opal chalcedony? I can’t find anything saying they are the same or similar in anyway. Is it opal or chalcedony?

@@pupfish_ He is confused or something. Opal is softer. I am guessing he means Jasper or seam agate.

Excellent question!

Probably the supervolcano vent that blew its lid over 6 times as it migrated north to presently in the Yosemite area of Wyoming. Where it is now,and it's still moving,Yosemite Lake in the last decade has moved over 1000 feet for example. The last eruption was 550,000 years ago. Hope that is the last one.

I am perhaps an unrepresentatively scientifically literate sample of the audience, but this being a production of a PBS station, perhaps not. I learned what conglomerate is in elementary school, so I had no problem following what he was explaining. In fact, I found it refreshing that the video doesn't assume total ignorance on the part of the audience.

Can you explain why he said opal is chalcedony? I have never heard that before and can’t find anything saying they are the same mineral?

It’s the same

@@eckosters how?

@@pupfish_ Opal and chalcedony are both amorphous (non-crystalline) forms of silica (silicon dioxide), the same mineral that makes up quartz crystal, and they are both deposition products of silica-rich water underground. The only real difference between them is the size and structure of the deposition products, which in opal specifically consist of nanoparticles that are of a size near the wavelengths of visible light, such that the particles form a sort of diffraction grating that reflects and absorbs visible light with opal's characteristic "flashes" of color.