Universität zu Köln

Martin-Jones, Catherine M., Lane, Christine S., Pearce, Nicholas J. G., Smith, Victoria C., Lamb, Henry F., Schaebitz, Frank ORCID: 0000-0003-3879-9308, Brown, Maxwell C., Frank, Ute and Asrat, Asfawossen (2017). Recurrent explosive eruptions from a high-risk Main Ethiopian Rift volcano throughout the Holocene. Geology, 45 (12). S. 1127 - 1131. BOULDER: GEOLOGICAL SOC AMER, INC. ISSN 1943-2682

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Abstract

Corbetti caldera is the southernmost large volcanic system in Ethiopia, and has been categorized at the highest level of uncertainty in terms of hazard and risk. Until now, the number and frequency of past explosive eruptions at Corbetti has been unknown, due to limited studies of frequently incomplete and patchy outcrop sequences. Here we use volcanic ash layers preserved in sediments from three Main Ethiopian Rift lakes to provide the first detailed record of volcanism for the Corbetti caldera. We show that lake sediments yield more comprehensive, stratigraphically resolved dossiers of long-term volcanism than often available in outcrop. Our eruptive history for Corbetti spans the past 10 k.y. and reveals eruptions at an average return period of similar to 900 yr. The threat posed by Corbetti has until now been underestimated. Future explosive eruptions similar to those of the past 10 k.y. would blanket nearby Awassa and Shashamene, currently home to similar to 260,000 people, with pumice-fall deposits, and would have significant societal impacts. A lake sediment tephrostratigraphic approach shows significant potential for application throughout the East African Rift system, and will be essential to better understanding volcanic hazards in this rapidly developing region.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Martin-Jones, Catherine M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lane, Christine S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pearce, Nicholas J. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Smith, Victoria C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lamb, Henry F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schaebitz, Frank UNSPECIFIED orcid.org/0000-0003-3879-9308 UNSPECIFIED Brown, Maxwell C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Frank, Ute UNSPECIFIED UNSPECIFIED UNSPECIFIED Asrat, Asfawossen UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-209591
DOI:	10.1130/G39594.1
Journal or Publication Title:	Geology
Volume:	45
Number:	12
Page Range:	S. 1127 - 1131
Date:	2017
Publisher:	GEOLOGICAL SOC AMER, INC
Place of Publication:	BOULDER
ISSN:	1943-2682
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SEDIMENTS; DEPOSITS; ERITREA; RECORD Multiple languages Geology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/20959