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Showing results for tags 'creteceous'.
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This came from the beach at Dumpton Gap in Kent. The site is mostly cretaceous chalk with bands of flint and produces sea urchins but I don't know what this is. My suspicion is sponge but I may have to stand in pseudes corner with my face to the wall.
Norki posted a topic in Fossil IDI just came back from a surveying trip with some specialists from the museum this weekend, and naturally on the day after they left I happened to come across this oddball... It's really nothing like I've ever seen in the area before. The fossil itself is a piece of fragile lignitic wood inside a sandstone concretion, found in a thin layer of the late cretaceous marine Bearpaw formation associated with trace burrow fossils, and known to be deposited in a near-shore deltaic environment. Very well preserved, fragile lignitic wood is common, as well as other trace burrow fossils (you can see some in the concretion itself), which leads me to believe that these are infilled burrows of some kind (termites?). But I've never seen burrows in fossil wood that look like this, never mind in mud or any other substrate. They look to be too closely clustered together to be burrows, as in most substrates this would cause the walls between them to collapse. I know the chances are astronomically low, and that this almost definitely isn't the case, but this looks the most to me like some sort of fungal colony more than anything. Could it be a trace fossil of some kind of fungus or plant? I only have these photos from the field currently, as the specimen is currently jacketed, but I might have a chance to get some better photos either tomorrow or sometime later this week. (PS, I still find myself unable to upload any images to the forum. I get an error message that says, "The page you are trying to access is not available to guests, but may be available if you sign in.") View of concretion Note the lignitic wood still clinging to the top and bottom of the hollow once presumably filled by it. Left close-up Right close-up Some of the smaller "nodules"