| Abstract: | Analyses of seismic-reflection profiles, sediment cores, grab samples, and side-scan sonar records, along with previously collected borehole data, reveal the geologic history of the shallow strata beneath the Potomac River estuary. The lowermost strata are sediments of the Chesapeake Group (lower Miocene to lower Pleistocene). The top of these sediments is an erosional unconformity that outlines the Wisconsinan valley of the Potomac River. During the Holocene transgression of sea level, the ancestral valley was filled with as much as 40m of sandy and silty estuarine sediments. The fill became the substrate for oyster bars in the upper reach and now forms most marginal slopes of the estuary. Pb-210 analyses indicate that modern mud is accumulating at rates lowest near the mouth and increasing toward the head of the estuary, ie. an increased accumulation near the turbidity maximum.-from Author |
| Genre: | Article |
| ProdID: | 70012150 |
| Citation Author: | Knebel, H. J.; Martin, E. A.; Glenn, J. L.; Needell, S. W. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 589 |
| Citation Issue: | 8 pt 1 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Geological Society of America Bulletin |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 12 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Sedimentary framework of the Potomac River estuary, Maryland ( USA).; 1981; Article; Journal; Geological Society of America Bulletin; Knebel, H. J.; Martin, E. A.; Glenn, J. L.; Needell, S. W. |
| Citation Start Page: | 578 |
| Citation Volume: | 92 |
| Citation Year: | 1981 |
| Type: | citation/reference |
| Text: | Sedimentary framework of the Potomac River estuary, Maryland ( USA).; 1981; Article; Journal; Geological Society of America Bulletin; Knebel, H. J.; Martin, E. A.; Glenn, J. L.; Needell, S. W. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1981 00:00 -0600 |
| Publisher: | |
