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Showing results for tags 'line'.
Found 3 results
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I wonder what the line in this rock could be, to the right of the brachiopod. The line is less than 1 mm in diameter. Also if it is possible ID the genus or family of the braciopod? The age is Mid or Late Ordovician.
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First off what are the lines on ammonites called? I was looking at images to find out what they are called and found septa on most but suture lines on some other ones, which is correct? Sorry ammonites isn't my strength. After that I was wondering if the lines had anything to do with age like on a big horn sheep's horns. I was doing some research on them and found that the 4 year old line is the most prominent and was wondering if ammonites had something similar. I thought they might because the last ring ends differently on different specimens, which is easy to tell when half has been cut and polished.
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I picked up this Wild boar (Sus scrofa) jaw section from Florida recently. While it not recognized in the Florida fossil record due to the boar being an introduced species in the past 600 years or so years. This piece has heavy patina, and is mineralized but is too young to be a fossil as it is thought to be a peice that is 400-500 years old. I have Mastodon and cave bear material that are older and far less mineralized. Other than using the rough date of 11k years ago, how else do I explain why a younger less mineralized peice is not a fossil while an older less mineralized peice is a fossil? Thoughts?
