Carnivore Coprolites from the Upper Triassic Ischigualasto Formation, Argentina: Chemistry, Mineralogy, and Evidence for Rapid Initial Mineralization

  title={Carnivore Coprolites from the Upper Triassic Ischigualasto Formation, Argentina: Chemistry, Mineralogy, and Evidence for Rapid Initial Mineralization},
  author={Kurt T. Hollocher and Oscar A. Alcober and Carina E. Colombi and Thomas C. Hollocher},
Abstract Coprolites were collected 74 m above the base of the Upper Triassic Ischigualasto Formation of northwestern Argentina and their chemistry, mineralogy, and textures were studied to infer their biological source and taphonomy. They were found to contain a few fragments of bone and much crystalline apatite, and so can be assigned to carnivores able to digest bone. Primary minerals derived from endogenous materials were apatite and pyrite, and secondary minerals derived from ground water… 


Abstract A single, low-density (1.58 g/cm3), phosphatic coprolite recovered from a fluvial Triceratops site in the Upper Cretaceous Hell Creek Formation of eastern Montana contains small quantities

Bone diagenesis of tetrapods from the Middle Triassic Tarjados Formation: implication for depositional environment and palaeoclimate

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Histological and diagenetic features of sauropod and theropod bones from the late Cretaceous Loncoche Formation of southern Mendoza, Argentina were analyzed to elucidate the degree and type of



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The phosphorous cycle filters through both the biological and geological worlds, and sedimentary phosphates exist at the interface between these two portions of the global phosphorous cycle.

Bacterial Residues in Coprolite of Herbivorous Dinosaurs: Role of Bacteria in Mineralization of Feces

Observations suggest that bacteria within the capillaries induced initial mineralization of the coprolite, and, in so doing, created barriers that protected organic residues from subsequent destruction.

Quaternary phosphorites from the continental margin off Chennai, southeast India: Analogs of ancient phosphate stromatolites

ABSTRACT Pleistocene phosphorites occur on the continental margin off Chennai abundantly in the depth range of 186-293 m. They are associated with outer-shelf glauconites and carbonate skeletals

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The palaeobiology of trace fossils

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A new carnivorous cynodont from the Ischigualasto Formation (Late Triassic, Argentina), with comments on eucynodont phylogeny

ABSTRACT The nearly complete skull of a recently discovered carnivorous eucynodont, Ecteninion lunensis, gen. et sp. nov., is described. This is the first new genus of carnivorous cynodont reported

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The apatite-group minerals of the general formula, M10(ZO4)6X2 (M = Ca, Sr, Pb, Na…, Z = P, As, Si, V…, and X = F, OH, Cl…), are remarkably tolerant to structural distortion and chemical

Crocodilian scatology, microvertebrate concentrations, and enamel-less teeth

  • D. Fisher
  • Geography, Environmental Science
  • 1981
It has been suggested that certain fossil assemblages consisting of disarticulated and broken remains of small to medium-sized vertebrates (“microvertebrate concentrations”) may be accumulations of