Portal de Periódicos da CAPES

Chapter 6 Land-sea level relations

2003; Elsevier BV; Linguagem: Inglês

10.1016/s1571-0866(03)80009-x

2212-1161

Geological formations and processes

Publisher SummaryThis chapter presents a study related to land-sea level relations. The high incidence of disturbance caused by earthquakes north of the Peninsula de Taitao–Golfo de Penas triple plate junction has obscured isostatic and eustatic sea level changes. South of the junction in Fuego–Patagonia, where earthquake incidence is far less, past land-marine relations, by contrast, are widely discernible. Marine fossils in growth positions on raised beaches inland date the age and extent of past transgressions. Unloading of continental ice during deglaciation and reloading of coastal sectors by meltwater have contributed much to neotectonic deformation in the region. General concordance of altitudes for the zones suggests primarily a glacio-eustatic cause for the higher strandlines. The chapter presents two figures one related to shell bed exposure at Caleta Percy, Bahía Gente Grande, marking higher sea level along Estrecho de Magallanes. The second figure is related to Holocene sea-level curves of transgression-regression along Estrecho de Magallanes and Canal Beagle in comparison with the sea-level curve of Clark and Bloom, and others.