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Showing results for tags 'ridge'.
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Sorry I don't know where this comes from exactly. It was found at an estate sale in Texas. Was told it was a part of a collectors pieces from Southwest U.S. and was presented as Native American. So far Native American people think it is a fossil so here I am asking your opinion. It's heavy, fits in the palm of your hand, has a noticeable single ridge on the humped side, has a hole in the top and a hole in the flatter side; is black in color with many grey channels or etchings on the humped side. In your opinion is this a fossil and if so any idea what it is of? If it helps, it feels kind of cool to touch. Thank you for your interest and time.
Hello everyone, Archaeological training, when I walk on the beach of Carnon (34) yesterday afternoon, this half vertebra silted next the seashore jumped out at me: However, ichthyology is not my field, I can not determine the animal. If someone know, it would be great! Also, do you think it is old (his red-brown color gives me hope for a fossil)? Thank you in advance! PS: Sorry for my approximative english
bugsheep posted a topic in Questions & AnswersI have a few questions I’m unable to answer about ammonites. I’ve been doing some casual research, but it seems to lead to more confusion on this. I would really appreciate it if anyone could suggest more sites to look at as well. What kind of shell “decoration” is present on ammonites with ammonitic sutures? Was there any “normal” combination of shell and suture mark, or could their shells have any pattern of ridges, knobs, etc.? I’ve been hoping to find a sort of before and after polishing photo/sketch set, showing what shell went with what suture pattern, but have been unable to find anything. While trying to find the photo/sketch, I realized all photos of ammonitic sutures I’d found were of creatures that were involute, the outer whorls almost completely covering the inner. Is this just a coincidence, or were most/all ammonites with ammonitic sutures so involute? Also, did any/some/many/all ammonites with ammonitic sutures have an aptychus? I've been able to find all sorts of information on these features individually, but not on co-incidence, so to speak.