height. Sea-level fluctuations are a good measure of thermocline depth 

 fluctuations in the tropical Pacific between about 15° N and 15° S and allow 

 the determination of changes of upper- layer volume. Sea- level is also a good 

 measure of heat content, and useful correlations extend to higher latitudes. 

 Dynamic height and sea- level fluctuations agree only in those areas where the 

 thermal structure resembles a two- layer system very well, and good 

 correlations are restricted to a narrower area. The combination of 

 bathythermograph and sea- level observations will allow a better mapping of the 

 changes of thermocline topography, heat content, and dynamic height for the 

 monitoring of climatic changes in the tropical Pacific. (Authors). 



290 REDFIELD, A. C. 1967. "Postglacial Change in Sea-Level in the Western 

 North Atlantic Ocean," Science . Vol 157, No. 3789, pp 687-692. 



Radioactive carbon determinations of the age of peat indicate that at 

 Bermuda, southern Florida, North Carolina, and Louisiana, the relative sea- 

 level has risen at approximately the same rate, 2.5 x 10'^ ft per year (0.76 x 

 10"' m per year), during the past 4,000 years. It is proposed tentatively 

 that this is the rate of eustatic change in sea- level. The rise in sea- level 

 along the northeastern coast of the United States has been at a rate much 

 greater than this, indicating local subsidence of the land. Between Cape Cod 

 and northern Virginia, coastal subsidence of 13 ft appears to have occurred 

 between 4,000 and 2,000 years ago and has continued at a rate of about 1 x 

 10' ft per year since then. On the northeastern coast of Massachusetts, 

 subsidence of 6 ft occurred between 4,000 and 3,000 years ago; since then sea- 

 level has risen at about the eustatic rate. Between 12,000 and 4,000 years 

 ago, sea- level rose at an average of about 11 x lO"' ft per year. The part 

 played by local subsidence of temporary departures from the average rate dur- 

 ing this period is uncertain. (Authors) . 



291 REILIENGER, R. 1987. "Re-analysis of Crustal Warping in Coastal 

 Maine," Geology . Vol 15, pp 958-961. 



Investigation of leveling-circuit misclosures indicates the presence of 

 an uncorrected systematic error in one of the critical surveys previously used 

 to define rapid contemporary subsidence of easternmost Maine relative to 

 points farther inland; however, the average rate of subsidence is reduced from 

 9 mm/year, reported by Anderson et al . , to about 1-2 mm/year. This rate is 

 similar to that derived from the Eastport, Maine, tide gage, assuming a 1.0- 

 1.5 mm/year "eustatic" rise in sea- level. In addition, a subsidence rate of 

 1-2 mm/year is roughly consistent with longer term (a few thousand years) 

 rates derived from glacial-marine deltas and from dated basal peats along the 

 Maine coast. (Author). 



134 



