One of my favorite fossil types; dinosaur eggs come in all shapes and sizes — from an oval as small as a thumb, to a sphere as big as a basketball. These fossils are often faked by the hundreds, if not thousands, in Chinese factories(China is also the world's richest source of true dinosaur eggs). However, there are also many natural-occurring objects mistaken as dinosaur eggs such as concretions or even fortuitously-shaped rocks. Despite these hurdles, dinosaur eggs remain one of the most desirable of all fossils.
In extraordinary cases, the mother dinosaur can even be found; one such example is the famous Oviraptor of Mongolia lying next to its nest. Unless the embryo can be found however, it is next to impossible to truly identify the dinosaur species, hence dinosaur eggs have their own classification system based on the structure of the eggshell viewed under a microscope.
In extraordinary cases, the mother dinosaur can even be found; one such example is the famous Oviraptor of Mongolia lying next to its nest. Unless the embryo can be found however, it is next to impossible to truly identify the dinosaur species, hence dinosaur eggs have their own classification system based on the structure of the eggshell viewed under a microscope.
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By ThePhysicist · Posted
Good question, fossils of plants (unidentifiable debris, seeds, amber, palynomorphs) may be found in some. I discuss it more thoroughly in the album's accompanying thread: "A Comprehensive Sampling of the Hell Creek Formation"
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By Jaybot · Posted
Is there a possibility of fossil inside these river 'mudballs'?
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By Misha · Posted
Cast this in black and I think it looks even better, it gets rid of the transparency so here you can see much more detail. I did mess it up a bit and the teeth on this one didn't turn out as good, even though I thought I had a good method down for doing them which involved carefully filling the cavity bottom up with latex with a hypodermic needle. Might be because I didn't stuff them with cotton like last time and they got damaged when taking out the cast, but I'm not 100% sure. Either way, I'm happy with the result and probably won't be making any more casts of this piece
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By Mahnmut · Posted
Thanks!
I do actually use a mix of different materials.
Thylacosmilus and Thylacoleo are actually altered versions of the commercially available Smilodon model from geoworld, as is my Megantereon and Inostrancevia.
The skulls are 3d prints (Leo Nylon from a printing provider, the other ones PLA from my own printer). I used aluminum wire for additional ribs and lengthening of limbs, covered with epoxy putty.
The images below show the process well, I think.
Most of my models have 3d printed heads, the postcrania are a mix of plywood, wire, epoxy putty and, since I got my printer, printed PLA. all covered up with acryllic colours.
Using the bought models saves a lot of time, some I only changed a bit, others are completely changed, like the Oviraptorid made from mixed parts, more and more are completely selfmade like Tanystropheus.
Best regards,
Jan
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By izak_ · Posted
Terrific @Misha! I have seen this specimen on here a few times and thought it would latex well, nice work
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By Misha · Posted
Made a latex cast of this fossil today. Still practicing the technique, so it didn't come out super pretty but it shows what the maxilla would've been like had it not been just an impression in the rock. Especially interesting is the teeth and how you can see that they actually curve inwards, which I didn't notice before. The latex also preserves the fine texture of the fossil cartilage, which I wasn't expecting, unfortunately due to the transparency of the cast you can't really see this in the photo. I want to try experimenting with coloring the latex or ammonium chloride later on to get better images, but so far I'm very satisfied with these results.
This super cool technique was taught to me by @izak_ who seems to have it down to a science with some of his projects, as they look fantastic.
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By Josesaurus rex · Posted
Fantastic work!! What materials do you use to make these skeletons?
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By Al Dente · Posted
This one labeled G. contortus looks like Hemipristis.
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By Fossildude19 · Posted
Hey @bockryan,
Is this guy enrolled?
Cropped, brightened, and rotated:
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