Strangest thing happened

[TheRingFinder]

I was scuba diving fresh water about 30 feet deep. Found a beer can about 12 to 16 inches under the muck / sand. I grabbed it and was setting it aside as I saw a coin also. As soon as i opened my hand, the can shot straight up towards the surface. At the time, it was strange but I was more affixed on the walking liberty half dollar in the hole. I was in a zone and just kept searching. After I got out of the water, I thought more about the can. What in the world could have caused it to first sink to the bottom of the lake, sit there for years under a foot or more of silt, then rise to the surface. I have found hundreds of cans in the water - never has this occured.

Any thoughts - I too was thinking AIR - but how in the world did it get down there in the first place.

 

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[Jason in Enid]

Simple. Decomposing organic matter was slowly releasing gasses inside the buried can. The mud on and around it was keeping it anchored to the bottom. Once you pulled it free of the extra weight, it was free to float up to the surface.

 

[cactusrat]

I’m guessing the can filled with swamp gas ( methane gas produced when vegetation decomposes in water) after it was buried. When you unburied it, it floated up.

 

[TheRingFinder]

Jason, Are you sure that you are not the professor from Gilligans Island? < - Wow, wonder what the organic matter was?

 

[Luckystiff]

Did you open it up and see if it was still Fresh Tasting

 

[Jason in Enid]

Jason, Are you sure that you are not the professor from Gilligans Island? < - Wow, wonder what the organic matter was?

The organic material IS the mud. It is made up from decomposing plant and animal material.

If you need me to make a ham radio from a couple of coconuts, let me know.

 

[thrillathahunt]

Did you get the Walking Liberty half?

 

[TheRingFinder]

Did you get the Walking Liberty half?

Yep, check out my finds at :

http://www.treasurenet.com/forums/today-s-finds/378684-scuba-gold-skunked-but-did-ok-otherwise.html

 

[uglymailman]

can sank full,metal top or bottom rusted out but kept little bit of air still in top until set free?

 

[Nickleanddime]

If it was a closed can and aluminum the organic matter would have been the contents. I.e. the yeast and grains. A full beer can will float until the contents come to the surrounding water temps the will sink to next thermocline and so on down. Silt covered it then the contents decomposed and created the gas. I've found alot of empty beer cans that were closed laying in places and old pop cans that got forgotten in basements that were closed with a little mineral rattle in the can.