I've just come back from a trip to Yorkshire where I managed to do a little fossil hunting and was lucky enough to find this ammonite. The problem is though is that generally the preservation in the area wasn't great and this one is clearly covered in a mudstone/ shale type of rock. However I think it might be worth trying to remove the surrounding rock because the small bit which I can see seems to have preserved fairly well. However I don't know the best way to remove it, see i'm not very comfortable with chiseling it away because I'm fairly new to this so would probably end up ruining it! I've been told that it may work if I was to put it into the oven to warm it up and then put it into cold water which could 'shock' the fossil to break along lines of weakness but I'm not sure if it would work or not.
I've tried to post a picture of the fossil here but I'm not sure if its worked so if not here's a link:
http://s1069.photobucket.com/user/zozzy-zebra/media/IMG_0003_zps69eb4cbf.jpg.html
Any suggestions of how I can remove my ammonite would be greatly appreciated.
Thanks