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Showing results for tags 'harding sandstone'.
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From the album: Harding Sandstone
Chirognathus (Conodont) Harding Sandstone, Canyon City, CO, USA The "golden conodonts" from the Harding Sandstone. Conodont elements may have functioned as teeth similar to ours (though evolving independently of what would later become teeth in other vertebrates), or may have functioned as a filter apparatus. -
From the album: Harding Sandstone
Chondrichthyan? denticles Tezakia hardingensis Harding Sandstone, Canyon City, CO, USA These are possible Ordovician Chrondrichthyan (class of cartilaginous fish including sharks) denticles, if true, these would be the earliest known. Described by Andreev et al. (2015) and Sansom et al. (1996) ^Andreev et al. (2015) -
While my prime focus is essentially learning how to accurately describe Nature in the precise language of mathematics, I've always been intrigued by natural history - it's actually what started me on the path to physics. The sort of interrogation that paleontology practices provoked me to think and question even further, down to the fundamental science which makes it all work. Collecting fossils has brought a large amount of enjoyment to my life, and is often a welcome distraction from what can sometimes be straining work. The knowledge that I accumulate along the way is also part
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Back in May or so I got my hands on some micromatrix from the Harding Sandstone, CO, USA. This formation dates back to the Ordovician: ~450-475 mya. It's chock full of some really cool and important fossils. It has some of the earliest vertebrate material, and some of the earliest steps in the evolution of teeth! I hope this is an informative and fun look into an important period in life's history. If you feel I have mischaracterized something or have left out pertinent information, please do speak up! I do also plan to post more pictures as I sort through material. If there's something specif
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- odontodes
- eryptichius
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From the album: Harding Sandstone
These star-like tubercles give Astraspis its name. Magnification 40x + iPhone zoom. -
From the album: Harding Sandstone
Field of view at 40x magnification in red circle.-
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- conodont elements
- conodont
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From the album: Harding Sandstone
Possible early shark or shark-like denticles. Magnification 40x. -
From the album: Harding Sandstone
Possible early shark or shark-like denticles. Magnification 40x + iPhone zoom. -
From the album: Harding Sandstone
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From the album: Harding Sandstone
Magnification 40x. -
From the album: Harding Sandstone
Magnification 40x + iPhone zoom.-
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- conodont
- conodont element
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From the album: Harding Sandstone
Armor plates with odontodes/tubercles. Magnification 40x + iPhone zoom. -
From the album: Harding Sandstone
Magnification 40x. -
From the album: Harding Sandstone
Magnification 40x. -
From the album: Harding Sandstone
Magnified 40x. -
From the album: Harding Sandstone
A closer view of the micromatrix in the vial. -
From the album: Harding Sandstone
Concentrated microfossil matrix from the Harding Sandstone. -
We have recently picked up some rather interesting micro shark teeth from the Paleozoic. Originally this was our way to get some older shark fossils to show students but I am actually pretty interested in continuing to collect micros from this period. First up, the oldest Chondrichthyes fossils we have and as I understand it, the second oldest yet found. Denticles Upper Ordovician Harding Sandstone Colorado I read that these had been given a name, Tezakia. Not sure if that is still valid or if these denticles match those described.
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- paleozoic sharks
- micro fossils
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