Late Holocene Climatic Change: The little ice age and El Nino from planktonic foraminifera in sediments off walvis bay, South West Africa

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dc.contributor.advisorJohnson, Ren_ZA
dc.contributor.authorHerbert, Russel Sen_ZA
dc.date.accessioned2014-08-15T14:15:12Z
dc.date.available2014-08-15T14:15:12Z
dc.date.issued1986en_ZA
dc.description.abstractThe variation in abundance of the species G. bulloides and G. pachyderma with depth in a core of diatomaceous sediment off Walvis Bay, South West Africa, seems to correlate with the Little Ice Age that occurred during the late Holocene. Although similar research, using species and oxygen isotope variations has been completed in similar sediment off northern Venezuela and in the Santa Barbara Basin (Kipp and Towner 1975, Dunbar 1983), these are the first downcore foraminiferal species records of the South West African deposit. The abundances of some of the minor species, most notably G. ruber, show very distinctive peaks at apparently random intervals. It is thought that these sudden and short-lived increases could be linked to major El-Nino-type events. In order to measure accurately all the down-core foraminiferal changes, we had to develop a chemical solution which dissolves diatoms and organic material without damaging the foraminiferal skeletons. It consists of K2CO3, CaCl2, NaOH and H202 in particular concentrations. By using this technique, it is possible to prevent biassing of the foraminiferal signal during extraction of foraminifera from diatomaceous mud.en_ZA
dc.identifier.apacitationHerbert, R. S. (1986). <i>Late Holocene Climatic Change: The little ice age and El Nino from planktonic foraminifera in sediments off walvis bay, South West Africa</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Geological Sciences. Retrieved from http://hdl.handle.net/11427/6568en_ZA
dc.identifier.chicagocitationHerbert, Russel S. <i>"Late Holocene Climatic Change: The little ice age and El Nino from planktonic foraminifera in sediments off walvis bay, South West Africa."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 1986. http://hdl.handle.net/11427/6568en_ZA
dc.identifier.citationHerbert, R. 1986. Late Holocene Climatic Change: The little ice age and El Nino from planktonic foraminifera in sediments off walvis bay, South West Africa. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Herbert, Russel S AB - The variation in abundance of the species G. bulloides and G. pachyderma with depth in a core of diatomaceous sediment off Walvis Bay, South West Africa, seems to correlate with the Little Ice Age that occurred during the late Holocene. Although similar research, using species and oxygen isotope variations has been completed in similar sediment off northern Venezuela and in the Santa Barbara Basin (Kipp and Towner 1975, Dunbar 1983), these are the first downcore foraminiferal species records of the South West African deposit. The abundances of some of the minor species, most notably G. ruber, show very distinctive peaks at apparently random intervals. It is thought that these sudden and short-lived increases could be linked to major El-Nino-type events. In order to measure accurately all the down-core foraminiferal changes, we had to develop a chemical solution which dissolves diatoms and organic material without damaging the foraminiferal skeletons. It consists of K2CO3, CaCl2, NaOH and H202 in particular concentrations. By using this technique, it is possible to prevent biassing of the foraminiferal signal during extraction of foraminifera from diatomaceous mud. DA - 1986 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1986 T1 - Late Holocene Climatic Change: The little ice age and El Nino from planktonic foraminifera in sediments off walvis bay, South West Africa TI - Late Holocene Climatic Change: The little ice age and El Nino from planktonic foraminifera in sediments off walvis bay, South West Africa UR - http://hdl.handle.net/11427/6568 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/6568
dc.identifier.vancouvercitationHerbert RS. Late Holocene Climatic Change: The little ice age and El Nino from planktonic foraminifera in sediments off walvis bay, South West Africa. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Geological Sciences, 1986 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/6568en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Geological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherScienceen_ZA
dc.titleLate Holocene Climatic Change: The little ice age and El Nino from planktonic foraminifera in sediments off walvis bay, South West Africaen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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