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- W4211156103 abstract "Abstract Excrement-shaped siderite masses have been the subject of much controversy. They have been variously interpreted either as being coprolites, cololites or pseudofossils created by mechanical deformation of plastic sediment. Here we report excrement-shaped ferruginous masses recovered from the Miocene of the Turów mine in south-western Poland. Mineralogical, geochemical, petrographic and microtomographical analyses indicate that these masses consist of siderite and iron oxide rather than phosphate, and rarely contain recognizable food residues, which may suggest abiotic origins of these structures. On the other hand, evidence in support of a faecal origin include: (i) the presence of two distinct morphotypes differing in size and shape, (ii) the limited quantity of specimens, (iii) the presence of rare hair-like structures or coalified inclusions and (iv) the presence of fine striations on the surface. Importantly, comparative actualistic studies of Recent vertebrate feces show overall resemblance of the first morphotype (sausage-shaped with rare coalified debris) to excrements of testudinoid turtles (Testudinoidea), whose shell fragment was found in the investigated locality. The second morphotype (rounded to oval-shaped with hair-like structures), in turn, is similar to the feces of some snakes (Serpentes), the remains of which were noted in the Miocene of the neighborhood areas." @default.
- W4211156103 created "2022-02-13" @default.
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- W4211156103 date "2021-09-07" @default.
- W4211156103 modified "2023-09-23" @default.
- W4211156103 title "Comparative Actualistic Study Hints at Origins of Intriguing Miocene “Coprolites” of Poland" @default.
- W4211156103 doi "https://doi.org/10.21203/rs.3.rs-864768/v1" @default.
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