climaxing in the latest Cenozoic (late Pliocene-Quaternary) , thus exposing a 

 nearly complete sequence of marine Cenozoic strata well suited for the study 

 of sedimentary cycles. 



Uncomformities , which form as a result of eustatic sea- level changes, 

 represent a very useful correlation tool, especially on continental margins 

 with a sufficiently high terrigenous sediment supply, and can be used to 

 supplement paleontologic correlations. Their ultimate usefulness for correla- 

 tion depends on the rapidity of the sea- level changes or the speed at which 

 sedimentary facies change in response to sea- level changes. If sea- level 

 changes rapidly (10 m/1 , 000 years), stratigraphic resolution will be high 

 (+10* years) but resolution decreases as the speed of sea-level change 

 decreases. Unconformities may well prove to be a vital tool linking the 

 classic land-based sections around the world with deep-sea sections . (Authors) . 



197 LUTJEHARMS, J. R. E., and ALHEIT, M. M. 1982. "Long-Term Sea-Level 

 Measurements, A Global Catalogue," National Technical Information Service 

 Technical Report Number CSIR/TR/SEA- 8210 , pp 110. 



This catalogue comprises a listing of all available sea-level measure- 

 ments in the world ocean for which records for more than five years duration 

 exist. The information includes the duration of such measurements, where they 

 were made, and the source of such data. The purpose of the catalogue is to 

 give an overview of the global distribution of long-term sea-level measure- 

 ments, relative to the major ocean currents, in order to facilitate deciding 

 on the location of new tide gage installations for the purpose of studying 

 long-term climatic changes. (National Technical Information Service 

 citation) . 



198 LUTERNAUER, J. L. , CLAGUE, J. J., CONWAY, K. W. , BARRIE . J. V., BLAISE. 

 B., MATHEWES, R. W. 1989. "Late Pleistocene Terrestrial Deposits on the 

 Continental Shelf of Western Canada: Evidence for Rapid Sea-Level Change at 

 the End of the Last Glaciation," Geology , Vol 17, pp 357-360. 



A paleosol with in situ rooted plant remains has been found in a core at 

 a water depth of 95 m on the central continental shelf of British Columbia. 

 Fluvial sediments associated with the paleosol are sharply overlain by 

 lagoonal or shallow pond sediment; these, in turn, are overlain by shallow- 

 marine sediments. Radiocarbon dates on wood fragments and root recovered from 

 the cored sediments indicate that relative sea-level was at least 95 m lower 

 10,500 year B.P. and that the core site was rapidly transgressed by the sea 

 shortly thereafter. This rapid transgression was contemporaneous with an 

 equally rapid regression at the heads of fiords on the British Columbia 

 mainland to the east. The two are probably genetically linked and a result of 

 late Pleistocene deglaciation and the migration and collapse of a glacial 

 forebulge. Our evidence indicates that large areas of the British Columbia 

 continental shelf were subaerially exposed 11-10 ka. This may have 

 facilitated the southward migration of early humans from Beringia into mid- 

 continental North America at the end of the Pleistocene. (Authors). 



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