Porosphaera globularis Fossil From Spain

This sponge fossil is called Porosphaera globularis from the Cretaceous Period. They were found in the region of Navarra, Spain.

According to the Natural History Museum of the U.K, people sometimes use these fossils as beads in necklaces. One was even found at a Bronze Age burial site with a skeleton from the Higham Marshes of Kent in south east England.

Thanks to Herb for these fossils.

Info sources:

http://uk.naturalhistory.museum/nature-online/earth/fossils/fossil-folklore/themes/decoration06.htm

http://www.thefossilforum.com/index.php?/gallery/image/29192-porosphaera-globularis/

Ptychotrygon triangularis Fossil

This fossil was found in the Carlile Shale Formation of Grant County, South Dakota, USA. He has been carefully extracting the hidden fossil shark teeth.  The fossils date to the Cretaceous Period (Turonian). The picture shows what appears to be a Ptychotrygon triangularis sawfish rostral denticle fossil. Field of view (FOV) is about 3 mm.

Thanks to Kenny for the image.

Info Sources:

http://www.phatfossils.com/species.php?species=Ptychotrygon%20Triangularis

Cantioscyllium decipiens Shark Fossil Tooth

My cousin has been working on some Carlile Shale Formation matrix. It was found in Grant County, South Dakota, USA. He has been carefully extracting the hidden fossil shark teeth.  The fossils date to the Cretaceous Period (Turonian). The picture shows what appears to be a Cantioscyllium decipiens tooth fossil. Field of view (FOV) is about 3 mm.

Thanks to Kenny for the image.

Info Sources:
http://www.chalk.discoveringfossils.co.uk/5%20Cantioscyllium.htm

http://fossilsofnj.com/shark/c_decipiens.htm