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Showing results for tags 'decalcified'.
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Unfortunatly this is is a slab found at the outcrop bottom, no opposite mould available. Ordovician, scale bar 5mm. 2 pics of the same specimens. Ideas?
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- decalcified
- ordovician
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Decalcified specimen from the Upper Ordovician of Italy. Scale bar: 5mm. It's possible to define at least the Order of this Mollusca, or it's pretentious to think so? It might belong to Gastropoda, Nautiloidea (i.e. Tarphycerida...),...? The attached image is formed by three pictures, the two on the left show the external mould, while the one on the right shows the internal mould.
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- decalcified
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Only for who is familiar with decalcified material. Upper ordovician, Italy. Scale bar 5mm. Decalcified specimen are preserved as the internal and the external mould, so the calcified part occupied the space between the two moulds. On the left side: the two moulds of the first specimen On the right side: only one mould available of another specimen (I guess conspecific), worst preservation. Any idea of what could be?
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- decalcified
- echinoderm
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Hi, this is a decalcified specimen (upper Ordovician - NE Italy). In order to understand the fossilization process of these specimens I've linked an image (Fig.1) of the internal mould of a Caryocrinitida (Rhombifera) with basal plates and stem facet preserved (from the same slab). So we're talking about the mould of the calcified parts of a living thing. Then I've linked some images of the specimen to identify: 2a-2b the whole specimen. 2c-2d I've carefully opened the slab. The "internal" part (?) 2e-2e_edit the "external" part (?) I'm wondering about a Porifera mould (never been found there). Or a coral mould? Bryozoan? ...? If it might be a Porifera I don't know if it's possible to identify the Class (Calcarea or Demospongiae). If the little "balls" are the mould of the identations of a syconoid sponge... Every little help is well accepted
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- decalcified
- ordovician
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