Title page for ETD etd-07152010-020125

Type of Document

Master's Thesis

Author

Bourland, William Clifford

URN

etd-07152010-020125

Title

Tectogenesis and metamorphism of the Piedmont from Columbia to Westview, Virginia along the James River.

Degree

Master of Science

Department

Geological Sciences

Advisory Committee

Advisor Name	Title
Glover, Lynn III	Committee Chair
Hewitt, David A.	Committee Member
Sinha, A. Krishna	Committee Member

Keywords

metamorphism

Date of Defense

1976-11-19

Availability

restricted

Abstract

During Late Precambrian or Early Cambrian (~550 m.y.) a sequence of interlayered graywackes and shales was intruded by the Columbia granite. At approximately 340 m.y. the granite and sediments were metamorphosed to at least amphibolite facies. During the peak and waning stages of metamorphism, these lighologies experienced 3 or possibly 4 deformational events which occurred while faulting was initiated along the Lakeside fault zone. Retrogressive mineral assemblages in fractures along the Lakeside fault and Central Piedmont Lineament indicate that reactivations along these zones occurred during regional cooling and continued after 221 m.y. During Late Triassic or Early Jurassic, the region was intruded by diabase dikes. An erosional unconformity separates alluvium and colluvium from the layered and intrusive rocks.

Files

Filename		Size	Approximate Download Time (Hours:Minutes:Seconds)
Filename		Size	28.8 Modem	56K Modem	ISDN (64 Kb)	ISDN (128 Kb)	Higher-speed Access
	LD5655.V855_1976.B687.pdf	23.78 Mb	01:50:04	00:56:36	00:49:32	00:24:46	00:02:06
	LD5655.V855_1976.B687_drw01.pdf	115.87 Kb	00:00:32	00:00:16	00:00:14	00:00:07	< 00:00:01
	LD5655.V855_1976.B687_drw02.pdf	45.12 Mb	03:28:52	01:47:25	01:33:59	00:46:59	00:04:00
	LD5655.V855_1976.B687_drw03.pdf	115.72 Kb	00:00:32	00:00:16	00:00:14	00:00:07	< 00:00:01

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