Is that a charcoal briquette?

• X-ray measurements indicate that Ryugu and carbonaceous meteorites contain a substantial, previously under-recognized magnesium-silicate-hydrate-like component.
• Experiments and solubility data suggest different compositions of this material can coexist under similar aqueous conditions.
• The proposed pathway could help explain chemical preservation during water alteration, but its historical sequence remains an interpretation.

Neat!

Wow, really pretty and equally helpful commentary

This is from today.

It appears to be a rock, and some gravel.

/s

I had a Knoppers bar in my backpack. But I forgor 😔

Next time remember to bring a banana.

Thank you for your reply!

also taking photos of rocks, its good to include something for scale, a coin, a lense cap, whatever

Yeah, I was thinking about that only after the fact unfortunately. Was hoping the dimensions might suffice.

Likely some type of trace fossil, from things living in mud under the water https://en.wikipedia.org/wiki/Trace_fossil

you could search 'fossils german alps', if these are common i presume theyre easy to find online

also taking photos of rocks, its good to include something for scale, a coin, a lense cap, whatever

getting to see this kind of stuff out in the world is always really exciting, enjoy!

They had to live in butts because brains hadn't been invented yet.

Prehistoric butt worms. 💯

https://www.youtube.com/watch?v=hbZ5mAz56Js

Even in a vacuum (nothing to absorb gamma), the count would go down as 1/r³ -- so it drops off fast!

Air doesn't absorb that much more than vacuum, but real materials do, with varying degrees of success. Ironically, one of the best gamma ray absorption materials is... depleted Uranium -- works better than lead, despite that fact that it is itself radioactive ;)

I used to take a uranium sample or 2 into show and tell at school along with a small geiger counter (looked about 1/2 the size of a lunch box with a silver aluminum handle). Everyone would oh and aw when I would move core sample close for the counter and it would make that classic clicking sound.

Uranium ore is a lot safer than most people expect -- up until the point it's been turned into concentrate anyway. The gamma is weak, and everything else can be blocked by a sheet of paper. That mattress probably shielded most of it.

I have an old scintillometer -- of the variety that prospectors would have used. Need a piece of uranium ore to verify that the counts drop when mattress is present ;)

My dad was a geologist. He would take me to places north of Cobalt, New Liskard and other places I now forget. We would fly into prospecting sites as there were no roads.

One time I remember he was doing some blasting and a rock about 45cm went whizzing about 10cm above my head. He just chuckled and said my that was a close one.

He had a buddy who would help him from time to time. This guy would store all the uranium ore samples under his sleeping cot in the tent when prospecting for uranium. Funny thing, he lived well into his 70’s.

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