Anyone found a good fossil?

Fujisawas Sake

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Sorry... Just a fossil clam given to me by an old friend... :P

Sushi and Sake,

John
 

WhiteKiboko

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all i have as far as fossils are concerned are just bivalve pieces and some augers...not really exciting, dont knowq much about them and theyre not cephs.... :|
 

Architeuthoceras

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Here is a fossil I found, from the Ordovician (about 450 mya) of Utah. You can see why they call Nautilus a living fossil. This is Plectolites, at least a fossil of the shell. Most of the chambers were broken and got filled with seafloor sediment, the left side is missing altogether. The chambers in the very center were still hollow when the sediment was turned to limestone, and latter the void was filled with calcite crystals, this destroyed the septa. The Siphuncle is a little different than in Nautilus

A fairly large file (196K) for detail

:ammonite:
 

Phil

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Wow! That's a beauty!

It's amazing to thing how similar this nautilus is to the modern species. I wonder which group of nautiloids it belonged to? According to my references the order of nautiloid that gave rise to our modern species did not appear until the early Devonian. So if yours is from the even more ancient Ordovician then it must belong to a separate long extinct nautiloid order.

Yet it is so similar! Amazing. I'll see if I can find out some info on Plectolites.

Phil
 

Phil

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That is a fantastic find.......do you find stuff like this regularly? Do you keep the fossils or sell them on?

Totally jealous!
 

Architeuthoceras

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Hi Guys!
The Goniatites are all in a single concretion. I found it in a wash after a gully-washer washed it out. It is the only concretion of that age I have found that still shows the nacreous luster of the original great-great-grandmother of pearl. I watch the National Weather Service page all the time and if I see a good storm go over that area, then I go see if any more wash out.
I usually keep the good ones an leave the others for other collectors. They are found on US Public Land (BLM) so I can only collect them in reasonable quantities, for personal use, and cannot sell or trade.
:ammonite:
 

Architeuthoceras

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It's hard to take a picture of the nacre in normal light, so I took a picture of a small piece of broken shell from the same concretion, then took a picture under the microscope with the light just right to show the colors. This is a piece of shell from Goniatites multiliratus, you can see the small ridges (lirae) that gives it it's name.
 

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