0 itemsThe Gregory Rift Valley and Neogene-Recent Volcanoes of Northern Tanzania
| Product Code: | M0033 |
| Type: | Book |
| Series: | GSL Memoirs |
| Ten Digit ISBN: | 1-86239-267-6 |
| Thirteen Digit ISBN: | 978-1-86239-267-0 |
| Author/Editor: | J B Dawson |
| Publisher: | GSL |
| Publication Date: | 05 December 2008 |
| Binding: | Paperback |
| Pages: | 112 |
| Weight: | 0.56kg |
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| Description
The structure and volcanic activity of the northern Tanzania sector of the Gregory Rift Valley have hitherto been less well described than those in Ethiopia and Kenya. This book focuses on northern Tanzania where, although the volcanic area is smaller than those to the north, there are major features such as Kilimanjaro, the highest mountain on the African continent; Ngorongoro, one of the largest calderas on Earth; and Oldoinyo Lengai, the world’s only active carbonatite volcano. Following an account of the discovery and early exploration of the rift valley, there are descriptions of the individual volcanoes. These are set within the context of the regional geology and geophysics of the rift valley, and in relation to the structural evolution of the rift and its associated sedimentary basins which include Olduvai, an important site in the history of human evolution The volume concludes with a discussion of the volcanism as related to the plume-related African Superswell. |
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Contents
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Reviews
Although the central theme is the volcanoes, this work will be of interest to geophysicists, structural geologists and geomorphologists, because the author is effective in using the volcanology to explore interrelationships between these specialised fields.
….read and enjoy this landmark publication.
Ken Bailey, University of Bristol.
Review was featured in Geoscientist Vol 20 No. 1 2010
This review was submitted by:
Mrs Julie Webster
10 March 2010
This Memoir effectively summarizes the truly remarkable and visually spectacular volcanic province in northern Tanzania toward the southern end of the Gregory Rift or eastern branch of the East African rift system.
….It is an invaluable addition to the geological literature as it provides an authoritative summary of this region, which contains so many unusual, even unique rock types.
The volume is well illustrated with geological maps, photographs, tables of representative chemical analyses of volcanic rocks, as well as figures showing some of the voluminous geochemical data available. Colour photographs of several of the volcanoes and photomicrographs of some of the rocks enhance the volume. In reviewing the geochemistry of the volcanic rocks, Dawson presents persuasive evidence that the bulk of the magmas, whether basaltic or carbonatitic, originate from the upper mantle, and that any assimilation of continental crustal material is minor or absent.
The author is to be congratulated in giving the geological community a very useful reference guide to this intriguing region and its volcanism.
Ian McDougall
This review was featured in the Journal of Geological Magazine, vol 147/2 2010
This review was submitted by:
Mrs Julie Webster
20 July 2010
This book provides a very comprehensive and readable summary of its structure and geological history.
The book is very well written and illustrated, with numerous figures and 26 good quality colour plates of the volcanoes themselves and of numerous thin sections.
Review by: Peter Webb, Atyrau, Kazakhstan
Featured in PESGB Newsletter July 2009
This review was submitted by:
Mrs Julie Webster
01 March 2011
....a well-balanced memoir in the Geological Society series, most of which arise from a successful conference..... Dr Dawson has succeeded admirably in presenting the balanced coverage sought by the Society.......
Twenty six colour plates illustrating some of the features unique to the volcanoes of northern Tanzania, grouped on pages 45 to 49, are a welcome addition. The number of thin section photos illustrating textures and mineral assemblages could have been doubled, and few would have objected.
....the author’s outstanding accomplishment in assembling a first-rate contribution on the petrology and mineralogy of alkaline silicate rocks ... Future generations of investigators will clearly benefit from Dr Dawson’s focused attention over the last half-century, as recounted in detail and in a balanced, non-dogmatic way in Memoir 33.
Review by: Robert F Martin, Ahmadu Bello University, Nigeria
Featured in The Canadian Mineralogist 48(1) Feb 2010
This review was submitted by:
Mrs Julie Webster
01 March 2011