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  • Book chapter
    Sephton MA, 2004,

    Compound specific isotope analysis of the organic constituents in meteorites

    , Handbook of stable isotope analytical techniques, Editors: de Groot, London, Publisher: Elsevier, Pages: 229-236, ISBN: 9780444511140
  • Journal article
    Watson JS, Pearson VK, Sephton MA, Gilmour Iet al., 2004,

    Molecular, isotopic and in-situ analytical approaches to the study of meteoritic organic material

    , International Journal of Astrobiology, Vol: 3, Pages: 107-116, ISSN: 1473-5504
  • Journal article
    Bridges JC, Schwanethal JP, Pearson VK, Paton MD, Greenwood RC, Watson JS, Morgan GHet al., 2004,

    A very public fireball

    , Astronomy and Geophysics, Vol: 45, Pages: 625-626
  • Journal article
    Sephton MA, Verchovksy AB, Wright IP, 2004,

    Carbon and nitrogen isotope ratios in meteoritic organic matter; indicators of alteration processes on the parent asteroid

    , INT J ASTROBIOL, Vol: 3, Pages: 221-228, ISSN: 1473-5504
  • Journal article
    Pearson VK, Kearsley AT, Sephton MA, 2004,

    The in-situ detection of organic material in extraterrestrial samples

    , MICROS ANAL, Pages: 5-10, ISSN: 0958-1952
  • Book
    Gilmour I, Sephton MA, 2004,

    An introduction to astrobiology

    , Cambridge, Publisher: Cambridge University Press, ISBN: 9780521837361
  • Book chapter
    Sephton MA, 2004,

    Origin of Life

    , An introduction to astrobiology, Editors: Gilmour, Sephton, Cambridge, Publisher: Cambridge University Press, Pages: 1-41, ISBN: 9780521837361
  • Journal article
    Butterworth AL, Aballain A, Chappellaz J, Sephton MAet al., 2004,

    Combined element (H and C) stable isotope ratios of methane in carbonaceous chondrites

    , MON NOT R ASTRON SOC, Vol: 347, Pages: 807-812, ISSN: 0035-8711
  • Journal article
    Sephton MA, Verchovsky AB, Bland PA, Gilmour I, Grady MM, Wright IPet al., 2003,

    Investigating the variations in carbon and nitrogen isotopes in carbonaceous chondrites

    , GEOCHIMICA ET COSMOCHIMICA ACTA, Vol: 67, Pages: 2093-2108, ISSN: 0016-7037
  • Journal article
    Watson JS, Pearson VK, Gilmour I, Sephton MAet al., 2003,

    Contamination by sesquiterpenoid derivatives in the Orgueil carbonaceous chondrite

    , ORGANIC GEOCHEMISTRY, Vol: 34, Pages: 37-47, ISSN: 0146-6380
  • Journal article
    Wignall PB, Zonneveld JP, Sephton MA, 2003,

    Carbon and nitrogen isotope disturbances and an end-Norian (Late Triassic) extinction event : comment and reply

    , GEOLOGY, Vol: 7, Pages: e25-e25, ISSN: 0091-7613
  • Journal article
    Sephton MA, Amor K, Franchi IA, Wignall PB, Newton R, Zonneveld JPet al., 2002,

    Carbon and nitrogen isotope disturbances and an end-Norian (Late Triassic) extinction event

    , GEOLOGY, Vol: 30, Pages: 1119-1122, ISSN: 0091-7613
  • Journal article
    Pearson VK, Sephton MA, Kearsley AT, Bland PA, Franchi IA, Gilmour Iet al., 2002,

    Clay mineral-organic matter relationships in the early solar system

    , METEORITICS & PLANETARY SCIENCE, Vol: 37, Pages: 1829-1833, ISSN: 1086-9379
  • Journal article
    Watson JS, Jones DM, Swannell RPJ, van Duin ACTet al., 2002,

    Formation of carboxylic acids during aerobic biodegradation of crude oil and evidence of microbial oxidation of hopanes

    , Organic Geochemistry, Vol: 33, Pages: 1153-1169, ISSN: 0146-6380
  • Journal article
    Verchovsky AB, Sephton MA, Wright IP, Pillinger CTet al., 2002,

    Separation of planetary noble gas carrier from bulk carbon in enstatite chondrites during stepped combustion

    , EARTH AND PLANETARY SCIENCE LETTERS, Vol: 199, Pages: 243-255, ISSN: 0012-821X
  • Journal article
    Sephton MA, Wright IP, Gilmour I, de Leeuw JW, Grady MM, Pillinger CTet al., 2002,

    High molecular weight organic matter in martian meteorites

    , PLANETARY AND SPACE SCIENCE, Vol: 50, Pages: 711-716, ISSN: 0032-0633
  • Journal article
    Sephton MA, 2002,

    Organic compounds in carbonaceous meteorites

    , NATURAL PRODUCT REPORTS, Vol: 19, Pages: 292-311, ISSN: 0265-0568
  • Conference paper
    Sephton MA, Veefkind RJ, Looy CV, Visscher H, Brinkhuis H, de Leeuw JWet al., 2002,

    Lateral variations in end-Permian organic matter in northern Italy

    , 3rd Workshop of the European-Science-Foundation IMPACT Programme, Publisher: SPRINGER-VERLAG BERLIN, Pages: 11-24
  • Book
    Sephton MA, Smith S, 2002,

    Landforms and cycles

    , London, Publisher: Open University Press, ISBN: 9780749252076
  • Conference paper
    Sephton MA, Looy CV, Veefkind RJ, Brinkhuis H, De Leeuw JW, Visscher Het al., 2002,

    Synchronous record of delta C-13 shifts in the oceans and atmosphere at the end of the Permian

    , International Interdisciplinary Conference on Catastrophic Events and Mass Extinctions - Impacts and Beyond, Pages: 455-462

    In conjunction with the profound ecologic crisis at the end of the Permian, the most conspicuous geochemical event is the worldwide negative shift in the carbon isotopic composition (delta(13)C) of both carbonates and sedimentary organic matter. Comparative carbon isotopic analyses of carbonates and the molecular fossils of land plant leaf cuticles from a marine Permian-Triassic transition section in the southern Alps, northeastern Italy, substantiates the concept of synchronous disturbances in oceanic and atmospheric chemistry and, therefore, verifies the primary nature of the end-Permian delta(13)C disturbance. The delta(13)C excursion appears to be a consequence of the ecological crisis, and the global reservoir of soil organic matter may be the only plausible source of C-13-depleted carbon.

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