BIROn - Birkbeck Institutional Research Online

    Speleothem evidence for C3 dominated vegetation during the Late Miocene (Messinian) of South Africa

    Hopley, Phil and Reade, H. and Parrish, R. and De Kock, M. and Adams, J.W. (2019) Speleothem evidence for C3 dominated vegetation during the Late Miocene (Messinian) of South Africa. Review of Palaeobotany and Palynology 264 , pp. 75-89. ISSN 0034-6667.

    [img] Text
    Hopley et al 2019_RPP_Accepted Manuscript.pdf - Author's Accepted Manuscript
    Restricted to Repository staff only until 12 March 2020.
    Available under License Creative Commons Attribution Non-commercial No Derivatives.

    Download (3MB) | Request a copy

    Abstract

    During the Late Miocene, Africa experienced a number of ecological transitions including the spread of C4 grasslands, the expansion of the Sahara Desert, the Messinian Salinity Crisis and a number of mammalian migrations and expansions, including the origin of the hominin clade. A detailed understanding of the relationship between environmental change and hominin evolution is hampered by the paucity of data available from terrestrial localities, especially in southern Africa. Here, we present a stable isotope and trace element record from a speleothem from the South African cave site of Hoogland. Uranium-lead dating and magnetostratigraphy places the speleothem within the Messinian Age (7.25–5.33 Ma) of the Late Miocene, making it the oldest known cave deposit from the region near the UNESCO Fossil Hominids of South Africa World Heritage Site (locally known as the “Cradle of Humankind”). Low carbon isotope values indicate a predominantly C3 vegetation in the vicinity of the cave throughout the period of speleothem growth. It is not possible to determine if this represents a C3 grassland or a C3 woodland, but it is clear that an equivalent C3-rich environment has yet to be found during the Messinian of east Africa. We conclude that the C4 grass expansion occurred millions of years later in South Africa than it did in eastern Africa, and that this vegetation shift should be considered when comparing African vegetation change with the late Miocene hominin fossil record.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): Messinian, Speleothem, U–Pb age, Stable isotopes, C3 vegetation, South Africa
    School: Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences
    Research Centre: Earth and Planetary Sciences, Institute of
    Depositing User: Philip Hopley
    Date Deposited: 13 Mar 2019 14:32
    Last Modified: 13 Mar 2019 14:32
    URI: http://eprints.bbk.ac.uk/id/eprint/26666

    Statistics

    Downloads
    Activity Overview
    3Downloads
    29Hits

    Additional statistics are available via IRStats2.

    Archive Staff Only (login required)

    Edit/View Item Edit/View Item