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A sizeable mineral coming from the ever famous Graf roadcut that exposes the Elgin of the Maquoketa. Im thinking calcite, but im gonna be honest I haven't a clue.
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I found this partial curved cephalopod at the famous cephalopod beds (Maquoketa Fm, Upper Ordovician) at Graf, Iowa last year. It is the only non-Isorthoceras cephalopod I have found from here in my several trips. The only other cephalopod I have seen described from this site is Beloitoceras, but I don't believe that is what my specimen is. Has anyone come across anything similar? Thanks for your thoughts.
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This gastropod was found in a block of matrix from Graf, Iowa that I split open last week. I have never bumped into this type of gastropod from there before. Research has left me stumped. Suggestions are welcomed! Elgin member, Lower Maquoketa formation, Ordovician. Thanks for the help Mike
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A nice Dictyonema flabelliforme dendroid graptolite from Oslo Fields in Norway. It's Tremadoc, Lower Ordovician in age and is thus maybe around 480 mya. Another angle :
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- bou nemrou
- el kaid errami
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- bou nemrou
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- first bani group
- trigonirhynchiidae
- eocrinoid
- rostricellula minnesotensis
- izzegguirine formation
- rhynchotrematidae
- rostricellula
- rhynchotrema wisconsinense
- rhynchotrema ainsliei
- rhynchotrema
- minnesota
- rochester
- cummingsville formation
- lituites
- lituites lituus
- trilacinoceras hunanense
- huk formation
- trilacinoceras
- slemmested
- phyllograptus angustifolius
- phyllograptus
- rhabdinopleura flabelliformis
- rhabdinopleura
- tetragraptus serra
- tetragraptus
- upper ordovician
- arenig
- late ordovician
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- middle ordovician
- dictyonema flabelliforme
- dictyonema
- ordovician
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- norway
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- tremadoc
- lower ordovician
- pagoda formation
- oslo
- baota formation
- ampyx
- ampyx priscus
- upper fezouata formation
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- ouled slimane
- zagora
- raphiophoridae
- favosites
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- dufton shales
- cross fell
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- constellaria antheloidea
- cincinnati group
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- cincinnatian
- williamson county
- tennessee
- morocco
- china
- ascocystites
- bumastoides
- postville
- iowa
- anti atla