Only slightly related to whitewater, but I can’t find my copy of the book with the answer to my question. Yes I did search online, and with shit-free search engines.

I used to work as a raft guide on the Chattooga and we often told tourists it is one of the oldest rivers in the world. This was based off a book that a local river man researched / wrote about the river.

Now that I’m older, I’m curious about exactly how old. Like 200 million years? 300 million? Older than trees? The rings of Saturn? Sharks?!

If anyone is in the area, take a quick gander out of the book? Should be available at the outfitters. Thanks fam.

>Clearer estimates of the geoneutrino flux at each experiment could come from more detailed geological data, as well as further geoneutrino counts at each site. However, McDonough says the best thing would be to build a neutrino detector at the bottom of the ocean(opens a new tab). It’s an idea McDonough has championed for decades(opens a new tab).

>Such a detector would be far from continental rocks, which are rich in radioactive elements; oceanic crust is also thinner and more uniform. Crust-related uncertainties go down so much that “you are in mantle-only territory,” he said.

>The idea of an ocean-bottom detector, estimated to cost hundreds of millions of dollars(opens a new tab), has seen little take-up from government funders to date. But McDonough is hoping he can make something happen in China, which has given the green light to other big geoscience projects(opens a new tab). “It’s very possible,” he said. Until then, physicists will keep paddling around for answers deep underground.

See also: The study as it was published in the journal Geology.

I currently have an National Geographic rock tumbler (rubber barrel). It’s good but only issue is it’s way too loud… I now live in an apartment and you can’t hear it from outside but it’s way too loud inside.
If I was to buy a new tumbler I’d rather upgrade.. possibly 2 barrels but at this point I’m looking for opinions on what’s the quietest tumbler?

Please help I need real people not just every other ad saying this one is the quietest
Thanks

Recently watching some videos on youtube (mainly news) I stumbled upon 2 channels: Stefan Burns and On The Pulse With Silki; and... oh boy they were peculiar to say the least, and honestly do not know how they get so much traction. Expecially due to videos like one from Silki's channel about Campi Flegrei. At the start and shortly after that, you can see a video from a completely different event from the 4.7 magnitude. The events of the video were about a residential house in Messina that collapsed during rennovation works (I'm italian so I immediately recognized the clips)... but besides that, I was wondering, are there any reliable and good channels that you reccomend? thanks a lot!!!

PSA. I care to say that I do not wish to generate any sort or form of hate towards both channels, and just quoted them due to have been the only ones that popped up in my home page.

I know that oceanic plates are denser than continental plates which is why subducting occurrs. I also know these deeper sections can 'break off' from the main plate. But what's stopping them from slowly drifting back up under the continental plate?