Virginia Tech
Geology of the late precambrian Flat River complex and associated volcanic rocks near Durham, North Carolina
Abstract
dc:description.abstractDisotopic dating of zircons from the Flat River Complex in the Carolina "slate" belt north of Durham, N.C. shows this intrusive complex to be 650 ± m.y. old. Modal analyses of granophyric groundmass compared to experimental data, the presence of vent breccias and related pyroclastic deposits, and consideration of age relations between the intrusive and extrusive rocks indicate that the Flat River was emplaced at very shallow levels (< l km) and acted as the source for most of the volcanic material surrounding the complex. The age determined for the Flat River Complex indicates that deposition of the volcanic rocks began prior to 650 m.y. ago and extends the slate belt volcanicity interval to 130 m.y. (520 to 650 m.y. b.p.) Both subareal and marine depositional environments are represented in the stratigraphic sequence.
Degree
thesis:*- Name thesis:degree_name
- Master of Science
- Level thesis:degree_level
- masters
- Discipline thesis:degree_discipline
- Geological Sciences
- Department dc:contributor.department
- Geological Sciences
- Grantor dc:publisher
- Virginia Tech
- Year dc:date.issued
- 1974
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- McConnell, Keith I.
- Chair dc:contributor.committeechair
-
- Glover, Lynn III
- Committee members dc:contributor.committeemember
-
- Sinha, A. Krishna
- Gilbert, M. Charles
Subjects
dc:subject × 1Rights
dc:rights- Statement dc:rights
-
- In Copyright
- Licence dc:rights.uri
Identifiers
dc:identifier.*- Dc Identifier Other
- etd-02062013-040240
- OAI identifier oai:identifier
- oai:vtechworks.lib.vt.edu:10919/40961