Geologic history of coastal plain streams eastern Pitt Count, North Carolina / by John W. Maddry.
| Author/creator | Maddry, John W. author. |
| Other author | Riggs, Stanley R., degree supervisor. |
| Other author | East Carolina University. Department of Geology. |
| Format | Theses and dissertations |
| Production | 1979. |
| Description | vii, 102 leaves, 4 unnumbered leaves of plates : illustrations, maps ; 28 cm |
| Supplemental Content | Access via ScholarShip |
| Subjects |
| Summary | A series of drill traverses were made across the Tar River and two of its tributaries. Green Mill Run and Chicod Creek, located in eastern Pitt County, North Carolina. Six post-Yorktown stratigraphic units were identified. Units Q1 and Q2 represent a transgressive sequence deposited in nearshore marine and estuarine environments when sea level rose to between 27 and 29 meters above the present level. These sediments were subsequently eroded from the stream valleys during later periods of emergence. Units Q4 and Q5 were deposited within the embayed estuaries of the drowned valley of the Tar River as sea level later rose to about +8 meters. . Q4 was deposited in the shallow nearshore margin of the embayment while Q5 was deposited as soft muds further offshore. During the Late Wisconsin glacial stage, coarse arkosic sands of unit Q6 were deposited in the Tar River Valley by a rejuvenated ancestral Tar River. Sediment filling the stream valleys of Chicod Creek and Green Mill Run forms unit Q3. A compound age for Q3 is suggested as a result of sea level fluctuations; aggradation occurred when the stream valleys were inundated while erosion dominated during times of emergence. The Tar River originated after deposition of the Yorktown Formation and occupies a low in the top of the Yorktown and older formations. Although the Tar was inundated during each transgression, the river re-established its former position with the following emergent period. Chicod Creek and Green Mill Run developed on the eroded surface of Q1 and Q2 and do not appear to be controlled by lows in the top of the Yorktown Formation. |
| Local note | Joyner-"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 | "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 | Advisor: Stanley R. Riggs |
| Dissertation note | M.S. East Carolina University 1979 |
| Bibliography note | Includes bibliographical references (leaves 67-71). |
| Genre/form | dissertations. |
| 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 | NC Stacks | QE148.P5 M3X | ✔ Available | Place Hold |
| Electronic Resources | Access Content Online | ✔ Available |