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Showing results for tags 'prasopora'.
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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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Tagged with:
- bou nemrou
- el kaid errami
- 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
- early ordovician
- middle ordovician
- dictyonema flabelliforme
- dictyonema
- ordovician
- graptolite
- norway
- dendroid
- tremadoc
- lower ordovician
- pagoda formation
- oslo
- baota formation
- ampyx
- ampyx priscus
- upper fezouata formation
- fezouata formation
- ouled slimane
- zagora
- raphiophoridae
- favosites
- favosites fibrilla
- dufton shales
- cross fell
- pennines
- caradoc
- caradocian
- constellaria antheloidea
- cincinnati group
- constellaria
- cincinnatian
- williamson county
- tennessee
- morocco
- china
- ascocystites
- bumastoides
- postville
- iowa
- anti atla
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From the album: Platteville to Decorah formation Ordovician Twin Cities
Prasopora conoidea with unidentified bryozoan. You can also see rust stains. Rust stain can be very prevailing in some layers or spots on rocks. Mainly because glacial deposits tend to be very iron rich from Norrthern Minnesota and then they get dissolved in groundwater and redeposit on the fossil shell hash because they're much harder for water to pass through. Another thing to know: Prasopora strongly prefers muddy sediments and thus wont appear or rarely in carbonate rich environment. . -
From the album: Bryozoan of Minnesota Ordovician
Prasopora conoidea - average sizes that makes them noticeable. Sometime in the future I will have to examine closer - but I suspects smaller colonies may exists on harder surfaces than most people thought. From my examinations Prasopora conoidea strongly prefers muddy sediments, as I hadn't found any in carbonate rich rocks. Seem to strongly prefers brachiopods of any sizes as starting point for their colonies though uncommonly occurs on bryozoans as well. Abundant in all layers of Decorah formation.-
- decorah formation
- ordovician
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From the album: Bryozoan of Minnesota Ordovician
Prasopora conoidea from Decorah Formation. Those are the largest ones I have found - seemly? (not 100% sure) only in upper Decorah Formation. The middle one is the largest I had found so far.-
- minnesota
- decorah formation
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From the album: Other Fossils
This is a large and robust Prasopora sp. from the Decorah Shale Formation of Minnesota.