Sea-Level Changes during the Last 9000 Years in North-West England

1974 ◽  
Vol 140 (1) ◽  
pp. 18 ◽  
Author(s):  
M. J. Tooley
Keyword(s):  
Sea Level ◽  
Sea Level Changes ◽  
North West

scholarly journals Prehistoric settlements and Holocene relative sea-level changes in northwest Sjælland, Denmark

2003 ◽  
Vol 50 ◽  
pp. 141-149
Author(s):  
Signe Ulfeldt Hede
Keyword(s):  
Sea Level ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
North West ◽  
Archaeological Data ◽  
Sediment Deposits ◽  
Bone Fragments ◽  
Area North ◽  
Prehistoric Settlements ◽  
Topographic Positions

The topographic and geographic distribution of the Mesolithic and Neolithic habitations seen today in the Saltbæk Vig area, north-west Sjælland are directly related to relative sea-level changes of the Littorina Sea. The archaeological data indicate that the settlements changed their topographic positions from lower to higher ground. This pattern is explained by a rising relative sea-level during the Atlantic and early Subboreal period. Geological investigations of this phenomenon focused on changes in relative sea-level documented by the sedimentary record. At Smakkerup Huse, a late Mesolithic site, a sequence of stacked transgressive and regressive sediment deposits confirmed that the occupation coincided with a slowing rate of relative sea-level rise and beginning of relative sea-level fall during the late Atlantic period. The timing of the changes in relative sea-level was obtained by radiocarbon measurements of wood and bone fragments together with implements retrieved from contemporaneous sediment deposits. A rise in relative sea-level during the early Subboreal forced the inhabitants at Smakkerup Huse and in the Saltbæk Vig area to relocate to higher grounds.

Lateglacial to Holocene relative sea-level changes in the Bjarkarlundur area near Reykhólar, North West Iceland

2009 ◽  
Vol 24 (7) ◽  
pp. 816-831 ◽  
Author(s):  
Jerry M. Lloyd ◽  
Hreggviður Norðdahl ◽  
Michael J. Bentley ◽  
Anthony J. Newton ◽  
Owen Tucker ◽  
...  
Keyword(s):  
Sea Level ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
North West

Sea-Level Changes: North-West England during the Flandrian Stage

1980 ◽  
Vol 146 (1) ◽  
pp. 124 ◽  
Author(s):  
Nicholas Stephens ◽  
M. J. Tooley
Keyword(s):  
Sea Level ◽  
Sea Level Changes ◽  
North West

Interglacial deposits at Bobbitshole, Ipswich

1957 ◽  
Vol 241 (676) ◽  
pp. 1-31 ◽  
Keyword(s):  
Sea Level ◽  
Lacustrine Sediments ◽  
Interglacial Period ◽  
Lake Basin ◽  
Sea Level Changes ◽  
Last Interglacial ◽  
Marsh Vegetation ◽  
Sandy Gravel ◽  
North West ◽  
Plant Remains

The stratigraphy and palaeobotany of fresh-water interglacial deposits at Bobbitshole, Ipswich, Suffolk, have been investigated. The interglacial deposits are shown to occupy a lake basin in a valley cut in the local plateau, which is partly formed by a chalky boulder clay assigned to the Gipping ice advance. In this basin was deposited a series of lacustrine sediments, first silt (probably of aeolian origin), then clay-mud and finally clay. These interglacial sediments are sealed unconformably by sandy gravel, probably deposited under cold conditions. Pollen diagrams and macroscopic plant remains from the interglacial deposits are described. They give evidence of the vegetational and climatic history during the first half of an interglacial period. The succession of pollen zones found is similar to that described from the Eemian (Last) Interglacial in north-west Europe, with which the interglacial is correlated. The Eemian pollen zones b , c , d , e and f which show the succession from birch- to pine- to oak-dominated forest, are all present. An analysis of the very abundant macroscopic plant remains, together with the pollen results, suggests a rapid amelioration of the climate at the beginning of the interglacial period, and in zone f , the final zone represented, there are indications of a summer warmth exceeding that of the present day in the area. The interglacial flora is particularly rich in aquatic plants, and an analysis of the abundance of each species indicates a vegetational succession, as the lake filled with sediment, from open-water to reed-swamp to marsh vegetation. The palaeobotany of the deposits is briefly compared with that of other interglacial deposits in Britain and on the continent. The correlation of the interglacial deposits with the continental Eemian (Last) Interglacial provides confirmation of the correlation of the Gipping ice advance with the Saale Glaciation of northern Germany, and indicates that the covering gravels are of Last Glaciation age. The interglacial deposits are partly below sea-level, and close to the tidal Orwell estuary. The significance of this for local relative land- and sea-level changes in and after the interglacial is discussed.

Sea-Level Changes in North-West England during the Flandrian Stage.

1980 ◽  
Vol 68 (1) ◽  
pp. 342
Author(s):  
R. J. Devoy ◽  
M. J. Tooley
Keyword(s):  
Sea Level ◽  
Sea Level Changes ◽  
North West

A pre-cursor extensive Miocene reef system to the Rowley Shoals reefs, Western Australia: evidence for structural control of reef growth or natural hydrocarbon seepage?

2009 ◽  
Vol 49 (1) ◽  
pp. 337 ◽  
Author(s):  
Georgina Ryan ◽  
George Bernardel ◽  
John Kennard ◽  
Andrew T Jones ◽  
Graham Logan ◽  
...  
Keyword(s):  
Sea Level ◽  
Fault Zone ◽  
Western Australia ◽  
Growth Phase ◽  
Late Miocene ◽  
Structural Control ◽  
Middle Miocene ◽  
Reef Growth ◽  
Sea Level Changes ◽  
North West

Numerous Miocene reefs and related carbonate build-ups have been identified in the Rowley Shoals region of the central North West Shelf, offshore Western Australia. The reefs form part of an extensive Miocene reef tract over 1,600 km long, which extended northward into the Browse and Bonaparte basins and southward to North West Cape in the Carnarvon Basin—comparable in length to the modern Great Barrier Reef. Growth of the vast majority of these Miocene reefs failed to keep pace with relative sea-level changes in the latest Miocene, whereas reef growth continued on the central North West Shelf to form the three present-day atolls of the Rowley Shoals: Mermaid, Clerke and Imperieuse reefs. In the Rowley Shoals region, scattered small build-ups and local reef complexes were first established in the Early Miocene, but these build-ups were subsequently terminated at a major Mid Miocene sequence boundary. Widespread buildups and atoll reefs were re-established in the Middle Miocene, and the internal stacking geometries of the reefs appear to relate to distinct growth phases that are correlated with eustatic sea-level fluctuations. These geometries include: a basal aggradational buildup of early Middle Miocene age; a strongly progradational growth phase in the late Middle to early Late Miocene that constructed large reef atolls with infilling lagoon deposits; and a back-stepped aggradational growth phase that formed smaller reef caps in the early–latest Late Miocene. Growth of the majority of the reefs ceased at a major sea-level fall in the Late Miocene (Messinian), and only the reefs of the present-day Rowley Shoals (Mermaid, Clerke and Imperieuse reefs, as well as a drowned shoal to the southwest of Imperieuse Reef) continued to grow after this event. Growth of the Rowley Shoals reefs continued to keep pace with Pliocene-Recent sea-level changes, whereas the surrounding shelf subsided to depths of 230–440 m. We conclude that initial reef growth in the Rowley Shoals region was controlled by transpressional reactivation and structuring of the Mermaid Fault Zone during the early stage of collision between the Australian and Eurasian plates. During this structural reactivation, seabed fault scarps and topographic highs likely provided ideal sites for the initiation of reef growth. The subsequent growth and selective demise of the reefs was controlled by the interplay of eustatic sea-level variations and differential subsidence resulting from continued structural reactivation of the Mermaid Fault Zone. In contrast to models proposed in other regions, there is no direct evidence that active or palaeo hydrocarbon seepage triggered or controlled growth of the Rowley Shoals reefs or their buried Miocene predecessors.

Sea-level changes: North-west England during the flandrian stage

1982 ◽  
Vol 15 (4) ◽  
pp. 467-468
Author(s):  
R.A. Cullingford
Keyword(s):  
Sea Level ◽  
Sea Level Changes ◽  
North West
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