Building the Cape Verde Islands

  • Ricardo A. S.¬†Ramalho

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xviii
  2. Ricardo Alexandre dos Santos Ramalho
    Pages 1-12
  3. Ricardo Alexandre dos Santos Ramalho
    Pages 13-26
  4. Ricardo Alexandre dos Santos Ramalho
    Pages 27-46
  5. Ricardo Alexandre dos Santos Ramalho
    Pages 47-77
  6. Ricardo Alexandre dos Santos Ramalho
    Pages 79-138
  7. Ricardo Alexandre dos Santos Ramalho
    Pages 139-176
  8. Ricardo Alexandre dos Santos Ramalho
    Pages 177-197
  9. Ricardo Alexandre dos Santos Ramalho
    Pages 199-207

About this book

Introduction

Hotspots are enigmatic surface features that are not easily explained in the framework of plate tectonics. Investigating their origin is the goal of this thesis, using field evidence collected in the Cape Verde Islands, a prominent hotspot archipelago in the eastern Atlantic Ocean. The approach taken is to document uplift of the islands relative to sea level and use the uplift features to test various models of hotspot development. Island uplift is thought to arise from the growth of the anomalously shallow seafloor on which the islands rest, known as the bathymetric swell, which is characteristic of hotspots.

The work comprises a geological summary and detailed mapping of paleo sea level markers on Cape Verde. Isotopic dating of the markers shows that uplift on the islands over the last 6 Myr is up to 400 m, and that the uplift chronology varies among islands. Two processes act to raise the Cape Verde Islands. The dominant process is one that is local to individual islands. The regional, swell-related component is smaller, and possibly episodic. The observations provide strong constraints on swell development and on hotspot models.

Keywords

Geology of Cape Verde Archipelago Hotspot swells Ocean island evolution Tracers of relative sea-level on ocean islands Uplift and subsidence of ocean islands

Authors and affiliations

  • Ricardo A. S.¬†Ramalho
    • 1
  1. 1., Earth Sciences DepartmentUniversity of BristolBristolUnited Kingdom

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-642-19103-9
  • Copyright Information Springer-Verlag Berlin Heidelberg 2011
  • Publisher Name Springer, Berlin, Heidelberg
  • eBook Packages Earth and Environmental Science
  • Print ISBN 978-3-642-19102-2
  • Online ISBN 978-3-642-19103-9
  • About this book