Limestone slab packed with
Devonian Placoderm bone

            
Fossils
            of Arizona


            
Fossil
            of the Month

            

Triassic shale with fossil
seed

Updated  7/21/18
 
This section
            is devoted to showing off our most interesting monthly finds.
            Check back monthly for updates!

Latest images below:


            

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Big
            slab of Hyalithids from the Abrigo Formation

            
Left: A fine 12
            inch slab of limestone from the upper Abrigo formation in south
            eastern Arizona. Looking like scattered toothpics, this slab
            contains scores of calcified conchs of this enigmatic animal.
            Current evidence seems to indicate this was a type of extinct
            early mollusk and water currents aligned this group to point
            in mostly the same direction. 

 

            

The ornamentation is stunning.
Click image to enlarge to full size

            
November
            2017

            
Left: Zig Zag Ribbed
            Gastropods (Glyptospira cristulata)

            
These tiny gastropods
            are some of the most beautiful types we have found in the Fort
            Apache Limestone!



            

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October
            30, 2017

            
Left: Scaphopod
            Teleoconch from the Fort Apache Limestone east of Payson. This
            is one of the rarest occurences of this type of fossil found
            in the Permian.



            

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September
            25, 2017

            
Left: Microchonid
            from the Fort Apache Limestone at a magnification of 45x. A 10
            layer stack of images at different focus were combined with Picolay
            to creat this sharp image of this magnificent annelid domicile.



            

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July
            17, 2017

            
Left: Permian Sponge
            Actinocoelia
            Meandrina from
            the Fossil Mountain Member of the Kaibab Formation. We found
            this one on the top of the Mogollon Rim at the Fire Break Site.



            

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October
            9, 2016

            
Left: Shark Coprolites
            from the Permian Supai formation at the Christopher Creek uranium
            mine. Fossilized excretra such as this can provide clues to animals
            which did not leave any bones or other remains, and what thier
            diet may have consisted of. Most likely Xanthid Sharks.


Previous Fossil of the Month Entries:

 

            

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September
            18, 2016

            
Left: Polished
            quarter sized specimen of a Mescal Limestone stromatolite. This
            is from the "Algal Member" of the Mescal, found near
            Roosevelt Lake. Here we can see in this silicified specimen the
            nested cone structure typical of fossil algae found in Arizona.




            

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