Publications
71 results found
Macho GA, Spears IR, Leakey MG, et al., 2011, An Exploratory Study on the Combined Effects of External and Internal Morphology on Load Dissipation in Primate Capitates: Its Potential for an Understanding of the Positional and Locomotor Repertoire of Early Hominins, Folia Primatologica, Vol: 81, Pages: 292-304, ISSN: 0015-5713
Chahal HS, Karen S, Martina U, et al., 2011, AIP Mutation in Pituitary Adenomas in the 18th Century and Today, The New England Journal of Medicine, Vol: 364, Pages: 33-40
Abel RL, Xuan BV, Cotton R, et al., 2010, Fluid flow in and around the olfactory organ of a hammerhead shark, Comparative Biochemistry and Physiology A - Molecular & Integrative Physiology Part A, Vol: 155, Pages: 464-475
Hezel DC, Needham AW, Armytage R, et al., 2010, A nebula setting as the origin for bulk chondrule Fe isotope variations in CV chondrites, Earth and Planetary Science Letters, Vol: 296, Pages: 423-433, ISSN: 0012-821X
We combined micro computer tomography with Fe and Si isotope measurements of Mokoia, Allende and Grosnaja chondrules. Ten Mokoia chondrules contain 0.9 to 11.8 vol.% opaque phases (metal + sulfide), and 6 Allende chondrules contain 0.0 to 6.6 vol.% opaque phases. Hence, the Fe isotope composition of many chondrules is dominated by the Fe isotope composition of their opaque phases. We studied Fe isotopes of 35 bulk chondrules. The range is different for each of the three meteorites studied and largest for Allende with delta Fe-56 ranging from -0.82 to + 0.37%.. Six out of seven chondrules analysed for their Si isotope composition in Mokoia and Grosnaja have similar delta Si-29 of around -0.12%.. One anomalous chondrule in Mokoia has a delta Si-29 of +0.58%. We exclude isotopically heterogeneous chondrule precursors and different isotopic chondrule reservoirs as the source of the observed Fe isotope variation among bulk chondrules. We conclude that the observed bulk chondrule Fe isotope variation is the result of evaporation and re-condensation processes in a nebula setting with high dust densities, required to explain the comparatively low isotope fractionations. Subsequent parent body alteration slightly overprinted this pre-accretionary Fe isotope variation. (C) 2010 Elsevier B.V. All rights reserved.
Parfitt SA, Ashton NM, Lewis SG, et al., 2010, Early Pleistocene human occupation at the edge of the boreal zone in northwest Europe, Nature, Vol: 466, Pages: 229-233
Butler RJ, Barett PM, Abel RL, et al., 2009, A possible ctenosauriscid archosaur from the Middle Triassic Manda Beds of Tanzania, Journal of Vertebrate Paleontology, Vol: 29, Pages: 1022-1031
Ashkenazi S, Klass K, Mienis HK, et al., 2009, Fossil embryos and adult viviparids from the Early-Middle Pleistocene site of Gesher Benot Ya‘aqov, and their ecology, longevity and fecundity, Lethaia, Vol: 43, Pages: 116-127
McColl DJ, Abel RL, Spears IR, et al., 2006, Automated method to measure trabecular thickness from microcomputed tomographic scans and its application, The Anatomical Record Part A: Discoveries in Molecular, Cellular, and Evolutionary Biology, Vol: 288A, Pages: 982-988, ISSN: 1552-4892
Macho GA, Abel RL, Schutkowski H, 2005, Age changes in bone microstructure: do they occur uniformly?, International Journal of Osteoarchaeology, Vol: 15, Pages: 421-430, ISSN: 1099-1212
Porro LB, Butler RJ, Barrett PM, et al., New heterodontosaurid specimens from the Lower Jurassic of southern Africa and the early ornithischian dinosaur radiation, Environmental Science Transactions of the Royal Society of Edinburgh
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