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LEADER 05577ctm 2200613 i 4500

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035 a| (Sirsi) o176163540;

035 a| (OCoLC)176163540;

043 a| n-us-nc;

049 a| EREE;

050 4 a| GB454.I54b| S64 2006;

100 1 a| Smith, Curtis W.,e| author.=| ^A1338339;

245 10 a| Lithologic, geophysical, and paleoenvironmental framework of relict inlet channel-fill and adjacent facies :b| North Carolina Outer Banks /c| by Curtis W. Smith.;

264 0 c| 2006.;

300 a| xxii, 253 leaves :b| illustrations (some color), maps (some color) ;c| 28 cm;

336 a| textb| txt2| rdacontent;

337 a| unmediatedb| n2| rdamedia;

338 a| volumeb| nc2| rdacarrier;

502 b| M.S.c| East Carolina Universityd| 2006;

500 a| Presented to the faculty of the Department of Geological Sciences.;

500 a| Advisor: David J. Mallinson;

500 a| Advisor: Stephen J. Culver;

520 3 a| The geophysical, sedimentological and chronostratigraphic framework of the Outer Banks barrier island system (North Carolina, USA) is being defined. Previous researchers have reconstructed a complex evolutionary history of this barrier island system, including periods of partial barrier island collapse followed by barrier island reformation and transgression with extensive inlet formation. The focus of the present project is to define the extent, characteristics, and ages of relict inlets and subsequent channel-fill facies. Over 100 km of high-resolution ground penetrating radar (GPR) data were acquired between Oregon and Ocracoke Inlets. GPR facies were characterized using shore-parallel GPR transects and 3-D surveys at selected locations. GPR data were correlated to sediments collected in 27 vibracores to provide the regional shallow ([less-than]8 m) stratigraphic framework. Lithologic and microfossil data defined four facies allowing for inferences of multiple paleoenvironments. Organic and carbonate material have been dated using AMS ¹⁴C analyses and quartz sand units were dated using optically stimulated luminescence (OSL) analyses. GPR data reveal several previously undocumented relict inlet channels, as well as determining that inlet-fill constitutes a minimum of 40% to a maximum of 70% of the shallow ([less-than]8 m below ground surface) geologic framework. The data reveal multiple sequences of fill within complex inlets. Channel-fill sands are characterized by prominent clinoform packages, sometimes bounded by erosional surfaces, indicating variable sediment transport directions generally from the NE and NW within the majority of each complex inlet. Along the southernmost edge of most complex inlets, the data reveal shoal development and migration from the SE and SW late in the closure of the inlets. Three types of paleochannels (migrating complex inlet, non-migrating/single inlet, and non-migrating/complex inlet) were classified based on geometry and fill-patterns. Two OSL age estimates from vibracores taken at the site of the original breach of Oregon Inlet (known to occur in 1846 A.D.) produced correct ages on channel-fill sand. This represents a "proof of concept" that inlet-fill sands can provide accurate OSL ages documenting time of inlet activity. Use of OSL on channel-fill sand produces accurate ages that can be used to constrain inlet activity on the Outer Banks. OSL age estimates on channel-fill sands indicate a period of increased inlet activity along the Outer Banks from ~0.55 to 0.275 ka (2-sigma range).;

504 a| Includes bibliographical references (leaves 219-229).;

650 0 a| Inletsz| North Carolinaz| Outer Banks.=| ^A113953;

651 0 a| Outer Banks (N.C.)=| ^A89466;

650 0 a| Facies (Geology)z| North Carolinaz| Outer Banks.=| ^A50278;

650 0 a| Petrologyz| North Carolinaz| Outer Banks.=| ^A15838;

650 0 a| Geology, Stratigraphic.=| ^A23152;

650 7 a| Facies (Geology)2| fast0| (OCoLC)fst00919604;

650 7 a| Geology, Stratigraphic.2| fast0| (OCoLC)fst00940727;

650 7 a| Inlets.2| fast0| (OCoLC)fst00973685;

650 7 a| Petrology.2| fast0| (OCoLC)fst01059885;

655 7 a| Academic theses.2| fast0| (OCoLC)fst01726453;

655 7 a| Academic theses.2| lcgft;

655 7 a| Thèses et écrits académiques.2| rvmgf0| (CaQQLa)RVMGF-000001173;

655 2 a| Academic Dissertation.0| (DNLM)D019478?| UNAUTHORIZED;

700 1 a| Mallinson, David J.,e| degree supervisor.?| UNAUTHORIZED;

700 1 a| Culver, Stephen J.,e| degree supervisor.1| https://id.oclc.org/worldcat/entity/E39PCjKrBJYmh8dmXyFxykwpyd=| ^A153086;

710 2 a| East Carolina University.b| Department of Geological Sciences.=| ^A1066239;

856 41 z| Access via ScholarShipu| http://hdl.handle.net/10342/11480;

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949 a| Click on web addressw| asish| hsl111;

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Lithologic, geophysical, and paleoenvironmental framework of relict inlet channel-fill and adjacent facies North Carolina Outer Banks / by Curtis W. Smith.

Author/creator	Smith, Curtis W. author.
Other author	Mallinson, David J., degree supervisor.
Other author	Culver, Stephen J., degree supervisor.
Other author	East Carolina University. Department of Geological Sciences.
Format	Theses and dissertations
Production	2006.
Description	xxii, 253 leaves : illustrations (some color), maps (some color) ; 28 cm
Supplemental Content	Access via ScholarShip
Subjects	Inlets--North Carolina. --Outer Banks. Facies (Geology)--North Carolina. --Outer Banks. Petrology--North Carolina. --Outer Banks. Geology, Stratigraphic. Outer Banks (N.C.)

Summary	The geophysical, sedimentological and chronostratigraphic framework of the Outer Banks barrier island system (North Carolina, USA) is being defined. Previous researchers have reconstructed a complex evolutionary history of this barrier island system, including periods of partial barrier island collapse followed by barrier island reformation and transgression with extensive inlet formation. The focus of the present project is to define the extent, characteristics, and ages of relict inlets and subsequent channel-fill facies. Over 100 km of high-resolution ground penetrating radar (GPR) data were acquired between Oregon and Ocracoke Inlets. GPR facies were characterized using shore-parallel GPR transects and 3-D surveys at selected locations. GPR data were correlated to sediments collected in 27 vibracores to provide the regional shallow ([less-than]8 m) stratigraphic framework. Lithologic and microfossil data defined four facies allowing for inferences of multiple paleoenvironments. Organic and carbonate material have been dated using AMS ¹⁴C analyses and quartz sand units were dated using optically stimulated luminescence (OSL) analyses. GPR data reveal several previously undocumented relict inlet channels, as well as determining that inlet-fill constitutes a minimum of 40% to a maximum of 70% of the shallow ([less-than]8 m below ground surface) geologic framework. The data reveal multiple sequences of fill within complex inlets. Channel-fill sands are characterized by prominent clinoform packages, sometimes bounded by erosional surfaces, indicating variable sediment transport directions generally from the NE and NW within the majority of each complex inlet. Along the southernmost edge of most complex inlets, the data reveal shoal development and migration from the SE and SW late in the closure of the inlets. Three types of paleochannels (migrating complex inlet, non-migrating/single inlet, and non-migrating/complex inlet) were classified based on geometry and fill-patterns. Two OSL age estimates from vibracores taken at the site of the original breach of Oregon Inlet (known to occur in 1846 A.D.) produced correct ages on channel-fill sand. This represents a "proof of concept" that inlet-fill sands can provide accurate OSL ages documenting time of inlet activity. Use of OSL on channel-fill sand produces accurate ages that can be used to constrain inlet activity on the Outer Banks. OSL age estimates on channel-fill sands indicate a period of increased inlet activity along the Outer Banks from ~0.55 to 0.275 ka (2-sigma range).
General note	Presented to the faculty of the Department of Geological Sciences.
General note	Advisor: David J. Mallinson
General note	Advisor: Stephen J. Culver
Dissertation note	M.S. East Carolina University 2006
Bibliography note	Includes bibliographical references (leaves 219-229).
Genre/form	Academic theses.
Genre/form	Academic theses.
Genre/form	Thèses et écrits académiques.

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Lithologic, geophysical, and paleoenvironmental framework of relict inlet channel-fill and adjacent facies North Carolina Outer Banks / by Curtis W. Smith.

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