Petrology of the Alderson Formation (Mississippian) in southeastern West Virginia / by Brian Erwin Gray.
| Author/creator | Gray, Brian Erwin author. |
| Other author | Neal, Donald W., degree supervisor. |
| Other author | East Carolina University. Department of Geology. |
| Format | Theses and dissertations |
| Production | 1985. |
| Description | 166 leaves : illustrations (some color) ; 28 cm |
| Supplemental Content | Access via ScholarShip |
| Subjects |
| Summary | The Upper Mississippian (Chesterian) Alderson and Greenville Formations of the Greenbrier Group constitute a mixed carbonate-siliciclastic transition Interval between the underlying Greenbrier Group carbonates and the overlying fluvio-deltaic siliciclastic of the Bluefield Formation (Mauch Chunk Group). The Alderson Formation is up to 550 feet thick, varies from carbonate to siliciclastic sediments and extends across most of eastern West Virginia. The Greenville Formation up to 175 feet thick, is composed of non-calcareous, gray to black, silty shale and is found only in the Monroe County, West Virginia area. Four facies, containing twelve sub-facies, were recognized in the Alderson Formation. They are: 1) siliciclastic facies (sandstone, siltstone, and mudstone sub--facies), 2) mixed carbonate-siliciclastic facies (A, B, and C sub-facies), 3) carbonate sand facies (intraclastlc, oolitic, and bioclastic sub-facies), and 4) micritic facies (pelmicrlte, biomicrite, and micrite sub-facies). These facies were deposited on a gently sloping carbonate ramp in four depositional sequences. Depositional sequence I represents a period of transgression that developed during an episode of local subsidence. Depositional sequences II, III, and IV represent periods of standstill and episodic regression resulting In punctuated progradation of siliciclastic. Shortly after deposition, diagenesis began with micritization, mechanical compaction, graln-to-graln pressure solution, and Initial cementation by radial rim cement. With subsequent burial came continued mechanical compaction and the beginning of stylolltlzatlon, formation of syntaxlal and pore filling cements, and dolomitization. The timing of microspar, gypsum, pyrite and hematite formation, and of silicification Is uncertain, although all appear to have formed early In the diagenetic sequence. |
| General note | "Presented to the faculty of the Department of Geology ... in partial fulfillment of the requirements for the degree Master of Science in Geology." |
| General note | Part of illustrative matter (2 folded leaves)--in pocket. |
| General note | Advisor: Donald W. Neal |
| Dissertation note | M.S. East Carolina University 1985 |
| Bibliography note | Includes bibliographical references (leaves 114-126). |
| Genre/form | Academic theses. |
| Genre/form | Academic theses. |
| Genre/form | Thèses et écrits académiques. |
Availability
| Library | Location | Call Number | Status | Item Actions |
|---|---|---|---|---|
| Joyner | University Archives | ASK AT SPECIAL COLLECTIONS DESK | ✔ Available | Request Material |
| Joyner | Microforms | MICROFILM* | ✔ Available | |
| Electronic Resources | Access Content Online | ✔ Available |