Sea-Level and Crustal Movements along the New England-Acadian Shore, 4,500-3,000 B.P
| Autor: | W. Harrison, C. J. Lyon |
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| Rok vydání: | 1963 |
| Předmět: | |
| Zdroj: | The Journal of Geology. 71:96-108 |
| ISSN: | 1537-5269 0022-1376 |
| DOI: | 10.1086/626880 |
| Popis: | Remains of three drowned forests have been investigated at Odiorne Point, New Hampshire, and Fort Lawrence and Grand Pre, west-central Nova Scotia. Carbon-14 ages and altitudes below mean tide levels were determined for four in-place stumps of white pine at each locality. Assuming that each dated stump was killed by rising salt water, and that its $$C^{14}$$ age represented its true age at death, it was possible to construct curves showing the sequence of submergence and emergence at each site. A continuous transgression of the sea, approximating 0.31 foot per century, is indicated for the period 4,500-3,200 B.P. This rate corresponds well with Shepard's (1960) estimate of eustatic sea-level rise along the stable Texas coast for this time interval. Interpretation of the submergence-emergence curves in terms of crustal movements yields the following history: 4,500-3,800 B.P.: crustal stability at all three sites; 3,800-3,400 B.P.: crustal downwarping of west-central Nova Scotia at the approximate rate of 2... |
| Databáze: | OpenAIRE |
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