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Multi-proxy reconstuction of a ~1.3 Ma freshwater wetland, Olduvai Gorge, Tanzania

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TitleInfo
Title
Multi-proxy reconstuction of a ~1.3 Ma freshwater wetland, Olduvai Gorge, Tanzania
Name (type = personal)
NamePart (type = family)
Garrett
NamePart (type = given)
Kevin R.
NamePart (type = date)
1991-
DisplayForm
Kevin R. Garrett
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Ashley
NamePart (type = given)
Gail M.
DisplayForm
Gail M. Ashley
Affiliation
Advisory Committee
Role
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chair
Name (type = personal)
NamePart (type = family)
Reinfelder
NamePart (type = given)
John
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John Reinfelder
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Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Feibel
NamePart (type = given)
Craig
DisplayForm
Craig Feibel
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
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NamePart
Graduate School - New Brunswick
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school
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Text
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theses
OriginInfo
DateCreated (qualifier = exact)
2017
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2017-01
CopyrightDate (encoding = w3cdtf); (qualifier = exact)
2017
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Reconstruction of paleoenvironmental and paleoclimatic conditions is an important part of the interpretation of geological records, especially for deposits associated with fossils or cultural remains. This study presents a high resolution reconstruction of a ~1.3 Ma paleowetland in Olduvai Gorge, Tanzania, based on facies architecture, composition, clay mineralogy, grain size, stable isotopes, and biological remains (diatoms and phytoliths). Outcrops of a siliceous silt/carbonate packet were mapped over a distance of 1.5 km; stratigraphy was exposed in ten 1-3 m deep trenches. Five facies are identified and form the stratotype: sandy silt, siliceous earthy silt, carbonate, waxy sandy silt, and brown silty clay. The environment of deposition was a wetland with localized distributary channels formed at the distal end of a fluvial plain and margin of a saline-alkaline playa lake. The sequence starts with a sandy silt deposited as terminal splay delta or playa lake margin sands. The wetland sequence overlies this sandy silt and consists of a siliceous earthy silt (and local brown silty clay deposits) and an overlying carbonate. Phytoliths and diatoms record a biologically rich environment. The carbonate contains freshwater fossils and has a stable isotope signature reflecting meteoric source water. The sequence is capped with waxy sandy silts deposited as the playa lake expanded and drowned the wetland. The sequence records the effects of a rising water table related to more positive water budget (dry to wet portion of a Milankovitch precession cycle). This wetland was a persistent source of freshwater on the landscape for thousands of years. It would have provided a useful source of both food and water for the two species of hominin found in Olduvai at this time – Homo erectus and Paranthropus boisei.
Subject (authority = RUETD)
Topic
Geological Sciences
Subject (authority = ETD-LCSH)
Topic
Geology--Tanzania--Olduvai
Subject (authority = ETD-LCSH)
Topic
Wetlands
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_7834
PhysicalDescription
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electronic resource
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application/pdf
InternetMediaType
text/xml
Extent
1 online resource (xi, 84 p. : ill.)
Note (type = degree)
M.S.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Kevin R. Garrett
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T3T43WJ0
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Garrett
GivenName
Kevin
MiddleName
R.
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2017-01-09 11:46:37
AssociatedEntity
Name
Kevin Garrett
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject
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License
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Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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