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Showing results for tags 'ornamentation'.
Found 6 results
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Upper ordovician, Italy. Scale bar is 5mm. Pictures of external and internal moulds. Any ideas?
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Think you found an egg? Read this first! Dinosaur Egg Guide- Basic
CBchiefski posted a topic in Fossil ID
The Basic Dinosaur Egg Guide Many people often mistake a concretion for an egg, to help clarify what is a concretion, and what is a real egg, here is a guide. A quick overview with examples: How to spot a concretion: How are they different from eggs? A concretion is a rather common rock made of tightly compressed minerals. Typically, concretions are a smooth sphere or oval with little to no surface texture or just a few bumps. Often nearly a perfect sphere, sometimes more of an oval. In a concretion, there- 14 replies
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The Advanced Dinosaur Egg Guide Please share this with those who have egg questions. When possible, technical terms were avoided or defined. Every effort has been made to ensure accuracy, but it is always important to do your own research. This guide is merely a snapshot of information taken from many scientific publications. I am not an expert on eggs, rather I just love sharing what little I have learned over the years, what science has learned over the years. For an overview on how to spot a fossilized dinosaur egg and the sizes of eggs, see the basic guide:
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From the album: Eurypterid Fossils
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I have done many searches and cannot find the answer online.. I know ornamentation occurs in shark and fish fossils but is it possible that it covers entire fish and sharks, including teeth? Or does the ornamentation just occur on certain parts of a fish or shark?
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ID help needed. I found this well-preserved, ornate, large oyster in Maryland's Paleocene Aquia Formation. Is this the common Ostrea compressirostra? The lower valve's outer surface is quite ornamented, with radial folding along the protruding thin edges of the concentric growth rings (see pics). The valve margins are slightly discordant. The adductor muscle scar impressions, on both valves, contains what appears to be a thin layer of non-calcareous fossilized tissue. Specimen dimensions: Weight: 36 ounces Lower valve: height 6.75 inches, length 6.75 inches, convexity 1.5 inches Upper
