Another one from Norfolk. I dug this up from about 2m underground, in amongst clay, flint, sand and large chalk boulders, in Gimingham, in Norfolk.
It is almost perfectly conical in shape, forgiving the mineral deposits/displacements and a little wear and tear.
Does anybody know what this is/could be?
Thanks, Dan Billingham.
It has a curious cross-sectional shape...
Is it magnetic at all (is a magnet attracted to it) ?
If so, please check whether a piece if non-magnetized piece of iron/steel (eg. a kitchen knife) is attracted to it.
How heavy does it feel, considering its size? - heavier than a typical piece of rock or not?
I find the particular non-circular cross-sectional shape curious and I suspect significant.
But I don't recognize it.
I have nudged the NHM staff to take a look (which they would do anyway in due course).
Let's see if they come up with the answer.
Update: just had a thought - Baculites, perhaps?
(probably a bit too late for an orthocone ammonite)
There's a mention of Baculites in Norfolk here - http://nora.nerc.ac.uk/18104/1/MAW_Suffolk_Chalk_paper.pdf (but nothing of substance to help this ID question).
Thanks for the nudge Mike! Sorry I have been quiet for a while, we have been inundated with visitors and enquiries during the holiday period.
I am sorry I cannot identify this from the photograph. Please either bring or send it to the IAS (Identification and Advisory Service), Angela Marmont Centre, Natural History Museum. I will take a closer look and show it to our specialists.
All the best,