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Attached pictures are of a stone I discovered in our garden after receiving a load of landscape rock, believe they cam from Colorado. This particular stone is shaped like a road apple left by a horse. It is domed with a flat side like, as I said, a road apple left by a horse. Some of the surfaces are similar to a hard gray shell; while those areas where the shell has broken away are loosely packed red, black and clear crystalyn material that crumbles easily from the stone with light touch of the finger. Any ideas?
Not all rocks that look like poop have a fecal origin. Here are a few things to consider when trying to determine whether or not you have a coprolite: 1. Location, Location, Location – If you haven’t guessed, the first and most important thing to consider is the location your rock was found. Don’t expect to find a coprolite unless you find it in geologic area/layer where other fossils are found. If you find things like bones, teeth and fish scales, or prehistoric tracks, you may just be in in luck. 2. Shape – While fecal matter can be rather free-form when exposed to the elements or when digestion issues arise, most coprolites are shaped like poo. As with modern extrusions, fossilized feces can be shaped like pellets, spirals, scrolls, logs, piles, etc. Their shape is dependent on shape of their producers intestinal and anal structure. Look for things like compaction folds and pinch marks. 3. Texture - Most coprolites are fine grained. If your specimen appears granular under magnification, it is most likely not a coprolite. There are some exceptions, such as marine creatures that feed on bottom sediments or coral. That is why knowing the location and geology of the area where it was discovered is so important. 4. Inclusions – Many times, coprolites will have visible inclusions. Things like fish scales, bone fragments, and teeth may not get fully digested, and can be visible on the surface. Some animals ingest stones for ballast or digestive purposes. These are known as gastroliths, and if present, are generally smooth. 5. Composition – Because herbivore scat tends to break a part and decompose rapidly, it rarely survives the fossilization process. So most fossil poo that is found is from carnivores. The reason for this is that their poo is usually high in calcium phosphate, the same mineral found in bone. This mineral can appear in many forms. It can be hard and dense or soft and porous. If the potential coprolite appears soft and porous, there is a quick test that is often used in the field. If you touch to stone to the tip of your tongue and it sticks, chances are, it is high in calcium phosphate and could be a coprolite. If you are not that brave, you can also touch it with wet fingers to see if it feels sticky, but this is not nearly as fun. If the calcium phosphate takes a harder, more dense form, the “lick test” won’t work. In some instances, chemical analysis is required to definitively identify the mineral composition.
Brillweb101 posted a topic in Fossil IDI found this on Cromer beach Norfolk. It is 72.8grams 1.6 inches long Up the coast a while back a fossilised Mamouth was found surrounded by hyena droppings and I only saw a glimpse of a photo and it is similar to my find.I had a little trouble uploading photos but I hope they are enough thank you
I came upon these two things and I can't figure out what they might be. I found them in the White river formation in SD. Is it corrall? it almost has a mettalic ring when tapped, and seems alot denser than most things I pick up. Thanks for all the help!