Jump to content

DPS Ammonite

Recommended Posts

What is the net like pattern that sticks-out on the inside and outside of a silicified Pennsylvanian horn coral from NW of Payson, Arizona? Could it be an epibont-sponge? Could it be silica that filled cracks in part of the coral that was not silicified and eroded away? The coral opening is about 2.5 inches across.

P1020515 (1280x1168).jpg

P1020516 (1280x769).jpg

P1020517 (1280x920).jpg

My goal is to leave no stone or fossil unturned.   

See my Arizona Paleontology Guide    link  The best single resource for Arizona paleontology anywhere.       

Link to comment
Share on other sites

Did somebody say Boxwork! no? How about now?

Edit: which is basically the same thing Tony said I believe.

“...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin

Happy hunting,

Mason

Link to comment
Share on other sites

It's a phreatic calcite mosaic that extended into void-filling cement. 

A not unusual diagenetic product ,particularly in Pleistocene corals from the tropics

Vide supra:P

 

 

 

Link to comment
Share on other sites

Thank you everyone and Occam. The simplest answer is the best one.

My goal is to leave no stone or fossil unturned.   

See my Arizona Paleontology Guide    link  The best single resource for Arizona paleontology anywhere.       

Link to comment
Share on other sites

On 12/31/2017 at 7:22 PM, WhodamanHD said:

Did somebody say Boxwork! no? How about now?

Edit: which is basically the same thing Tony said I believe.

"boxwork" is more of a descriptive term and does apply in this case, but does not necessarily need be made of mineralized cracks.

Often boxwork is created by intergrown tabular crystals.

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

Link to comment
Share on other sites

Silica. I etched the whole thing out of limestone with HCl.

My goal is to leave no stone or fossil unturned.   

See my Arizona Paleontology Guide    link  The best single resource for Arizona paleontology anywhere.       

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...