Holocene sea level and climate change in the Black Sea: Multiple marine incursions related to freshwater discharge events
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Yanfu plain is situated in the east of North Jiangsu plain.Influenced by changes of sea level,the evolution of the Palaeogeography have gone through three stages here since Holocene.It became a shallow sea because of the transgression of sea and sea level was up in the early Holocene,and the space construction was comparatively single.During the middle Holocene,the old sandbars formed as sea level had remaind relatively steadiness,and the two-element construction constituted by lagoon and shallow sea formed at the two sides of the sandbars.Lixiahe area in the west had formed a closed lagoon and the east area was remained a shallow sea.During the late Holocene,this area had finished the change from sea to land and formed the three-element construction of geography space in Yanfu Area as sea level was down: The north was part of the Huanghuai Plain,and the lakes and marshlands in Lixiahe area reduced continuously,and have been changed into the Lixiahe plain.And the wide seashore plain of the east was formed because the seashore moved eastwards.
Marine transgression
Shoal
Palaeogeography
Coastal plain
Holocene climatic optimum
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Abstract Apoglossum gregarium , a minute deep-water red alga considered an alien in the Mediterranean Sea, was previously known only from the western basin. The present paper reports A. gregarium for the first time off Greece, in the eastern Mediterranean basin. It was found on artificial substrata at 50 m depth in the southeastern Ionian Sea. The Greek specimens were identical to previous Mediterranean descriptions. Moreover, the Greek habitat is the deepest ever recorded for the species. Associated flora as well as biogeographical data are also provided. Based on its worldwide distribution, the possibility that A. gregarium is native to the Mediterranean Sea should not be ruled out.
Mediterranean Basin
Flora
Alien species
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Abstract Two distinct elevations of emerged notches can be recognized on the southeastern coast of Vanua Levu: the higher notch is +2.22 to +3.30 m above low-tide level and the lower +1.52 to +1.65 m above low-tide level. Many emerged Holocene corals encrust higher notch floors and benches or occur as microatolls and from these radiocarbon ages ranging from 6000 to 3400 yr B.P. were obtained. The higher notches are significantly higher than present high-tide level, even allowing for relative tectonic uplift. This is supported by elevations of emerged microatolls and their 14 C ages. Thus, mean sea level of the mid-Holocene was higher than that at present.
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The geomorphology of a coarse clastic coastal landscape at Tuapaat (69°24'N 52°36'W), southeastern Disko Island, central West Greenland, is described, and a coastal morpho-stratigraphy of the landscape is constructed. 14C ages on marine shells, whale bones, peat and gyttja are used to construct relative sea level changes throughout the Holocene. The emergence of SE Disko Island occurred in the early part of the Holocene. The Holocene marine limit is situated ca. 80m a.s.l. Between 4.7 and 1.0ka BP, the relative sea level approached the present sea level and it has probably been below present sea level between 4.7 ka BP and the present. The morpho-stratigraphy in the lowest part of the coastal landscape at Tuapaat suggests a complex late Holocene relative sea level history which includes at least 3-4 transgressions during the last ca. 2.5 ka.
Holocene climatic optimum
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ABSTRACT In ca. 170 plankton samples from the eastern Mediterranean Sea 15 species of hydro-medusae were found; six of these occur in the western Mediterranean but have not previously been found in the eastern part. Four species are new to the Mediterranean Sea; probably two of these have been transported through the Suez Canal from the Red Sea. Data of the stations where the plankton has been collected are included.
Suez canal
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Okierabu-jima of the Ryukyu Islands, which is a poly-terraced Pleistocene raised coral reef island, doesn't have a Holocene raised coral reef, but coastal erosional features showing higher sea levels in Holocene. The authors obtained some data indicating the period of one of the Holocene higher sea levels.All radiocarbon dates concerning Okierabu-jima's Holocene sea-level changes are plotted on the date-height coordinates (Fig. 2). The paleo sea level between 5000 and 2000 y. B. P. lies above the broken line drawn from 6m below to 2.18m above the present sea level. The period of the highest sea level in Holocene seems to be about 3000 to 2000 y. B. P. in this island. Its height is presumably 2.4m a. s. l. derived on an average from heights of stacks and coastal benches in the almost all coasts of the island (Koba, 1974). Beach rocks were already formed at the landward extremity of the reef flat corresponding to the almost present sea level about 1300 y. B. P.
Fringing reef
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