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001 ocm31424837;

003 OCoLC;

005 20230725092804.0;

008 941108s1994 xx ab bm 000 0 eng d;

035 a| (Sirsi) o31424837;

035 a| (OCoLC)31424837;

043 a| n-us-nc;

049 a| EREE;

050 4 a| QE445.N8b| A45 1994;

100 1 a| Ames, Dorothea v. d. P.,e| author.=| ^A297114;

245 10 a| Petrology and stratigraphy of the Miocene Pungo River and Pliocene Yorktown Formations in the Aurora area, North Carolina /c| by Dorothea v.d.P. Ames.;

264 0 c| [1994];

300 a| v, 126 leaves :b| illustrations, maps ;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| 1994;

500 a| Submitted to the faculty of the Department of Geology.;

500 a| Advisor: Stanley R. Riggs;

520 3 a| The Miocene Pungo River and Pliocene Yorktown Formations underlie the central and eastern coastal plain of North Carolina. Portions of these formations, rich in phosphate, are mined near Aurora, North Carolina. This study addresses the depositional histories of the Pungo River and Yorktown Formations by developing a model of sea-level cycles in the Aurora area based on lithologic analyses of 134 samples from four cores (390, 391 GH8.5R and 392). The model demonstrates the effects of changing sea-level and resulting shifts in chemical conditions across the continental shelf that re-occur through time. The model suggests that there were 10 distinct sea-level events; two Aquitanian, three Burdigalian, three Langhian, one Serravallian, and one Pliocene; each identifiable by a combination of sedimentological characters. In addition, there were at least four major erosional events that occurred between the Aquitanian and Burdigalian, Burdigalian and Langhian, Langhian and Serravallian and Serravallian and Pliocene that removed major portions of the previously deposited units.;

504 a| Includes bibliographical references (leaves 84-87).;

650 0 a| Petrologyz| North Carolinaz| Pungo River.=| ^A15838;

650 0 a| Petrologyz| Yorktown Formation.=| ^A15838;

650 0 a| Geology, Stratigraphicy| Miocene.=| ^A20048;

650 0 a| Geology, Stratigraphicy| Pliocene.=| ^A21382;

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

650 7 a| Miocene Geologic Epoch.2| fast0| (OCoLC)fst01353827;

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

650 7 a| Pliocene Geologic Epoch.2| fast0| (OCoLC)fst01353984;

648 7 a| From 2 to 25 million years ago2| fast;

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| Riggs, Stanley R.,e| degree supervisor.=| ^A80459;

710 2 a| East Carolina University.b| Department of Geology.?| UNAUTHORIZED;

856 41 z| Access via ScholarShipu| http://hdl.handle.net/10342/11908;

949 a| Click on web addressw| asish| joyner101;

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

994 a| C0b| ERE;

596 a| 1 4;

998 a| 560823;

999 a| ASK AT SPECIAL COLLECTIONS DESKw| ASISc| 1i| 981343d| 1/22/2002l| JSCJTHDm| JOYNERr| Ys| Yt| JSCJTHDu| 1/22/2002x| ETDz| JSPECCOLLo| .STAFF. 0;

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Petrology and stratigraphy of the Miocene Pungo River and Pliocene Yorktown Formations in the Aurora area, North Carolina / by Dorothea v.d.P. Ames.

Author/creator	Ames, Dorothea v. d. P. author.
Other author	Riggs, Stanley R., degree supervisor.
Other author	East Carolina University. Department of Geology.
Format	Theses and dissertations
Production	[1994]
Description	v, 126 leaves : illustrations, maps ; 28 cm
Supplemental Content	Access via ScholarShip
Subjects	Petrology--North Carolina. --Pungo River. Petrology--Yorktown Formation. Geology, Stratigraphic--Miocene. Geology, Stratigraphic--Pliocene.

Summary	The Miocene Pungo River and Pliocene Yorktown Formations underlie the central and eastern coastal plain of North Carolina. Portions of these formations, rich in phosphate, are mined near Aurora, North Carolina. This study addresses the depositional histories of the Pungo River and Yorktown Formations by developing a model of sea-level cycles in the Aurora area based on lithologic analyses of 134 samples from four cores (390, 391 GH8.5R and 392). The model demonstrates the effects of changing sea-level and resulting shifts in chemical conditions across the continental shelf that re-occur through time. The model suggests that there were 10 distinct sea-level events; two Aquitanian, three Burdigalian, three Langhian, one Serravallian, and one Pliocene; each identifiable by a combination of sedimentological characters. In addition, there were at least four major erosional events that occurred between the Aquitanian and Burdigalian, Burdigalian and Langhian, Langhian and Serravallian and Serravallian and Pliocene that removed major portions of the previously deposited units.
General note	Submitted to the faculty of the Department of Geology.
General note	Advisor: Stanley R. Riggs
Dissertation note	M.S. East Carolina University 1994
Bibliography note	Includes bibliographical references (leaves 84-87).
Genre/form	Academic theses.
Genre/form	Academic theses.
Genre/form	Thèses et écrits académiques.

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Petrology and stratigraphy of the Miocene Pungo River and Pliocene Yorktown Formations in the Aurora area, North Carolina / by Dorothea v.d.P. Ames.

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