The emphasis of sea-level changes study is to search high accurate indicator.
While the traditional indicators, including coastal physiognomy and coastal sediment stratum, have shown large range of error. From the last 70's on, some distinct foraminifera assemblages, such as Jadammina macresens and Trochammina inflate, which dwelled coastal tidal salt-marsh, have been discovered in Severn, England and east coastline of the American. These assemblages are restricted between small ranges of altitude...
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