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825 Views 11 Replies Last post: Nov 2, 2013 9:17 PM by Tabfish RSS
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Oct 30, 2013 6:47 PM

A Question for tabfish- holderness ammonite

I bought this ammonite on the internet.  I wanted to improve my ammonite collection, so a bought a large ammonite that used to be in a museum and this little Dactyleoceras from holderness.  It is so small no one knows the exact species, but It is a baby Dactyleoceras.

 

 

 

What formation do you think it came from?

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    Oct 30, 2013 10:46 PM (in response to Dan)
    Re: A Question for tabfish- holderness ammonite

    Hi Dan

    Nearly missed this post! sorry.

    Your specimen looks well prepaired but there is no size mentioned only a baby Dac.

    Going by your description and the matrix it is in I would say it is a Dactylioceras grassile.

    Typical of the surrounding matrix that this 'Dac' is found in there looks to be several specimens although you usually find this ammonite with many more of it's kind in the matrix.

    If you are lucky enough to find some rock containing these ammonites sometimes the matrix contains other different ammonites - like Harpoceras sp.

    The Holderness doe's not have solid rock formations like around the Whitby area it only has 'Tills' yes underneth the Tills is the cretaceous chalk (what the Humber Bridge is built on) 

    The Tills are made up from boulder clay and there is several different types.

     

    Tabfish

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        Oct 31, 2013 10:33 AM (in response to Dan)
        Re: A Question for tabfish- holderness ammonite

        Hi Dan

        That looks a very good Somerset Harpo!

         

        Tabfish

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            Oct 31, 2013 10:40 PM (in response to Dan)
            Re: A Question for tabfish- holderness ammonite

            Thank's Dan

             

            Tabfish

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                Nov 1, 2013 11:06 PM (in response to Dan)
                Re: A Question for tabfish- holderness ammonite

                Hi Dan

                I am not at home tonight but will post tomorrow concerning this topic.

                 

                Tabfish

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                  Nov 2, 2013 9:03 PM (in response to Tabfish)
                  Re: A Question for tabfish- holderness ammonite

                  Hello Dan

                  Before you start prepairing fossils let's take one very important thing into consideration - your safety.

                  You only have one pair of eyes - so before you do any fossil preping the safety glasses go on.

                  Dust, usually the Yorkshire coast material is high in pyrite content so you must use a dust mask.

                  Noise, any tool you use especialy if it is electric or air powered will not be quiet so ear defenders need to be used as well.

                   

                  Tabfish

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                Nov 2, 2013 9:17 PM (in response to Dan)
                Re: A Question for tabfish- holderness ammonite

                Hi Dan

                I use 'air pens' for some of my fossil preparation, the rest is done by using hand tools but I have a friend who has one of the tools in your post and he turns out some fantastic specimens!

                What you have to remember is the Yorkshire coast rock is very very hard so you have to keep your stylus sharp and don't try to remove lots of material quickly.

                Sometimes it takes forever to reviel a specimen, not hours, not days, not weeks or months sometimes a lot longer than that.

                A quick thought - whatever fossil prep tool you have always keep a spair stylus handy.

                 

                Tabfish

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