Sea level and faunal change during the late Wenlock and earliest Ludlow (Silurian): A point of view from the Algerian Sahara

1994 ◽  
Vol 7 (4) ◽  
pp. 271-290 ◽  
Author(s):  
Philippe Legrand
Keyword(s):  
Sea Level ◽  
Point Of View ◽  
Faunal Change ◽  
Algerian Sahara

The Paleo-Eskimo Culture of Northeast Greenland Elucidated by Three New Sites

1954 ◽  
Vol 19 (4) ◽  
pp. 367-381 ◽  
Author(s):  
Eigil Knuth
Keyword(s):  
Sea Level ◽  
Point Of View ◽  
Greenland Sea ◽  
The West ◽  
East Greenland ◽  
Southern Border

Prinsesse Ingeborg Halvø is a low peninsula, situated on lat. 81°35'N., long. 16°35'W. in northernmost east-Greenland. From the west it wedges into the large local icecap Flade Isblink, which forms the easternmost corner of Greenland. The peninsula lies 70 miles southeast of the northernmost region in Greenland, Pearyland, separated from it by a bay, the joint mouth of two big fjords: Danmarks Fjord and Independence Fjord. The latter cuts its way westward from the Greenland Sea as the southern border of Pearyland (Fig. 101).At three places on Prinsesse Ingeborg Halvo (Fig. 102, A, B, C) paleo-Eskimo flint implements were spotted by the author of this article during the summer of 1952. The localities were all situated at a height of 40-50 feet above sea level and at a distance of 370-810 yards from the present coastline. Thus, from a geological point of view they belonged to the same horizon in the system of old raised beach terraces of the peninsula.

Premieres observations sur les alentours de la baie de Tongoy (Chili)

1966 ◽  
Vol S7-VIII (1) ◽  
pp. 21-24
Author(s):  
Dietrich Herm ◽  
Roland Paskoff ◽  
Joerg Stiefel
Keyword(s):  
Sea Level ◽  
Precise Determination ◽  
Point Of View ◽  
Bay Area

Abstract The Tongoy bay area, situated 300 km north of Valparaiso (Chile), is a graben bordered by two uplifted blocks. During the Pliocene and Quaternary this graben served as a depositional trap. From a geomorphic point of view, three marine stages are recognized, corresponding to periods of stillstand above present sea level. Geomorphic, paleontologic, and sedimentologic studies permit a precise determination of the Pliocene-Quaternary evolution of this region.

scholarly journals The contribution of the ecozones to the ecostratigraphy. As an example the Plio - Pleistocene basin of Magoula- Karatoulas (Ilia, NE Peloponnesos)

2018 ◽  
Vol 34 (2) ◽  
pp. 593
Author(s):  
Α. ΣΙΝΕΚΟΓΛΟΥ ◽  
Α. ΜΑΡΚΟΠΟΥΛΟΥ-ΔΙΑΚΑΝΤΩΝΗ ◽  
Ο. DRAGASTAN
Keyword(s):  
Sea Level ◽  
Sedimentary Basin ◽  
Point Of View ◽  
White Spots ◽  
The Rich

In this paper is marked the contribution of the Ecozones to the Ecostratigraphy. As an example we use the drillings (Ml, M2, M3, M4, M6, MIO) coming from the Plio- Pleistocene basin of the Magoula- Karatoulas (Pyrgos, Peloponnesus). Based on the detailed stratigraphical and paleoecological studies of the postalpine sediments (VAGIAS et al. 1995) of the formation of Vounargo (HAGEMAN 1977,1979 & ΚΑΜΠΕΡΗΣ 1987) we attempt to define 15 ecozones, as it is understood the layer or the whole of the layers, which is characterized by an association of fossils (at the level of species, genus or family). The Ecozone reflects the evolution of a sedimentary basin from the bathymetrical point of view as well as the transgressions and the regressions. The Ecozones are often related with the curve of the change of the sea level. The transgression is characterized by the rich fossil associations (species and individuals), while the regression is characterized by a diminution of species and individuals. There are also 11 white spots, which can not be enclosed in Ecozones. They are observed in the drillings M2, M3, M4, M6 and MIO.

scholarly journals Some climatological characteristics of mean sea level pressure in Bangladesh

MAUSAM ◽  
2021 ◽  
Vol 42 (2) ◽  
pp. 195-200
Author(s):  
A. MOBASSHER ◽  
M. H. RASHID
Keyword(s):  
Spatial Distribution ◽  
Sea Level ◽  
Annual Variation ◽  
Spatial Variations ◽  
Point Of View ◽  
Sea Level Pressure ◽  
Climatological Data ◽  
Mean Sea Level ◽  
Level Pressure ◽  
Actual Variation

On the basis of climatological data of 30 years (1951-1980) for 16 stations a climatological study of mean sea level pressure in Bangladesh has been accomplished. Spatial distribution and actual variation of mean sea level pressure have been studied. Attempt has been made to explain the cause of annual variation of mean sea, level pressure in Bangladesh from the point of view of synoptic meteorology. "Stability" of the meteorological stations of Bangladesh with respect to mean sea level pressure has been quired. The spatial variations of correlation of coefficients with regard to mean sea level pressure have been analysed. Finally, some characteristics of probabilities of mean sea level pressure at different materials for selected stations have been obtained.

scholarly journals Establishing an Integrated Permanent Sea-Level Monitoring Infrastructure towards the Implementation of Maritime Spatial Planning in Cyprus

2020 ◽  
Vol 8 (11) ◽  
pp. 861
Author(s):  
Chris Danezis ◽  
Marios Nikolaidis ◽  
Christodoulos Mettas ◽  
Diofantos G. Hadjimitsis ◽  
Georgios Kokosis ◽  
...  
Keyword(s):  
Sea Level ◽  
Spatial Planning ◽  
Point Of View ◽  
The European Union ◽  
Geospatial Information ◽  
First Results ◽  
Working Together ◽  
Vertical Crustal Motion ◽  
The Government ◽  
Maritime Spatial Planning

The Maritime Spatial Planning is a piece of legislation (2014/89/EU) of the European Union that must be implemented by all member countries to enable management of their waters in a more coherent way to reduce conflicts, encourage investments, increase cross-border cooperation and protect the environment. Cyprus and Greece are working together in the frame of the THALCHOR2 project to implement this directive. From the Cyprus point of view, this directive has been a unique opportunity to modernize its Hydrographic and Geodetic Infrastructure to enable and facilitate the generation of reliable marine geospatial information. Concordantly, a network of integrated state-of-the-art multi-sensor stations has been established along the shoreline of the government-controlled territories to seamlessly monitor sea level, vertical crustal motion and meteorological parameters. This research provides insight into the implementation of this infrastructure and the data processing workflow to determine tidal levels. Furthermore, the first results acquired after exploiting two years of observations are presented along with initial aspects concerning mean sea-level variability in the Southeastern Mediterranean region.

scholarly journals Characterization of clay deposits in the Adrar region, with a view to their valorization in the building materials industry

2018 ◽  
Vol 149 ◽  
pp. 01079
Author(s):  
Abbou Mohammed ◽  
Moulay Omar Hassan ◽  
Semcha Abdélaziz ◽  
Kazi-Aoual Fatiha
Keyword(s):  
Construction Industry ◽  
Building Materials ◽  
Local Development ◽  
Construction Materials ◽  
Sedimentary Basins ◽  
Point Of View ◽  
Clay Deposits ◽  
Algerian Sahara ◽  
Local Materials

In the context of sustainable local development of the Adrar region, one of the largest regions in the Algerian Sahara. The search for local useful substances has been initiated by the Algerian state to cover the need for building materials in the construction industry. However, from a geological point of view, the Adrar zone is located in the extension of the primary chain of the Ougarta which separates two sedimentary basins of Reggane and Timimoun, as well as the basin of Sbâa. In this context, an experimental study is focused on the characterization of clay deposits, with a view to their valorization in the construction materials industry (ceramics) sector, with the aim of contributing to the use of local materials.

Qualification of a Small Gas Turbine Engine as a Starter Unit

2017 ◽  
Vol 0 (0) ◽  
Author(s):  
R. K. Mishra ◽  
Prashant Kumar ◽  
K. S. Jayasihma ◽  
S. N. Mistry
Keyword(s):  
High Altitude ◽  
Gas Turbine ◽  
Sea Level ◽  
Rotational Speed ◽  
Gas Turbine Engine ◽  
Point Of View ◽  
High Rotational Speed ◽  
Turbine Engine ◽  
Starter Unit

AbstractThe certification philosophy plays an important role in ensuring the airworthiness qualification of a small gas turbine engine designed as a starter unit. The small and compactness of the engine, high rotational speed of the rotors, requirements of torque and starting capability at sea level to high altitude airfields and consecutive starts within stipulated time impose a great challenge from airworthiness point of view. This paper presents the methodology adopted and various stages of qualification, standards followed and results based on which the starter unit has been qualified for fitment on the designated aircraft.

Pleistocene deposits at Earnley, Bracklesham bay, Sussex

1984 ◽  
Vol 306 (1127) ◽  
pp. 137-157 ◽  
Keyword(s):  
Sea Level ◽  
Pollen Analysis ◽  
Deciduous Forest ◽  
Point Of View ◽  
Tidal Channel ◽  
Present Position ◽  
Tidal Level ◽  
Pollen Assemblage

Pollen, diatoms, foraminifers, molluscs and ostracods are described from a Pleistocene tem perate stage channel filling of m arine sediments on the foreshore at Bracklesham Bay, Sussex. Pollen analysis indicates the presence of a regional mixed coniferous and deciduous forest during the period of the channel filling, of a type known from the later parts of tem perate stages older than the Ipswichian. Diatom and foraminifer analyses both indicate a shallowing sequence of sediments, with higher energy tidal channel deposition at the base of the sequence and intertidal m ud flat deposition towards the top. The sediments appear to have been deposited at a time of falling sea level. At the close of sedim entation mean tidal level was about 0.7-1 m below its present position. Evidence for the age of the channel filling is discussed from the point of view of the pollen assemblage, foraminifers and ostracods. It is older than the Ipswichian and may be late H oxnian or late Crom erian in age.

Future estuarine circulation patterns characterization based on a hydrodynamic models ensemble

2021 ◽  
Author(s):  
Isabel Iglesias ◽  
José Luís Pinho ◽  
Ana Bio ◽  
Paulo Avilez-Valente ◽  
Willian Melo ◽  
...  
Keyword(s):  
Sea Level ◽  
River Flow ◽  
Extreme Values ◽  
Numerical Models ◽  
Point Of View ◽  
Sea Levels ◽  
Flood Peak ◽  
Climate Change Effects ◽  
Hydrodynamic Behaviour ◽  
Rising Sea Levels

<p>Estuarine regions are strategically important from an environmental, economic, and social point of view. To reduce vulnerability and increase resilience, it is crucial to know their dynamics that usually are poorly understood. Numerical models have proven to be an appropriate tool to improve this knowledge and simulate scenarios for future conditions. However, as the modelling results may be inaccurate, the application of the ensembles technique can be very useful in reducing possible uncertainties. In the EsCo-Ensembles project, this technique is proposed to improve hydrodynamic predictions for two Portuguese estuaries: Douro and Minho.</p><p>Two already validated numerical models (openTELEMAC-MASCARET and Delft3D), which have demonstrated their ability to accurately describe estuarine hydrodynamic patterns and water elevation for river flow in normal and extreme conditions, were applied. Several scenarios for climate change effects were defined including river flood peak flows for the 100 and 1000 year return periods and sea level extreme values for RCPs 4.5 and 8.5 in 2100.</p><p>The results demonstrated a clear difference between the hydrodynamic behaviour of the two estuaries. Model outcomes for the Minho estuary, which is dominated by the tide and therefore by oceanographic conditions, show a pronounced effect of rising sea levels on estuarine hydrodynamics. Whereas, for the Douro estuary, which is heavily dominated by the river flow, the effect of the sea level rise is hardly noticeable during flood events.</p><p>These and further results of this ongoing project are expected to (i) provide a complete hydrodynamic characterization of the two estuaries; (ii) evaluate future trends; (iii) estimate the flood risks associated with extreme events and (iv) demonstrate that the combined use of different models reduces their uncertainty and increases the confidence and consistency of the forecasts.</p><p><strong>Acknowledgements: </strong>To the Strategic Funding UIDB/04423/2020 and UIDP/04423/2020 (FCT and ERDF) and to the project EsCo-Ensembles (PTDC/ECI-EGC/30877/2017, NORTE 2020, Portugal 2020, ERDF and FCT). The authors also want to acknowledge the data provided by EDP, IH and Confederación Hidrográfica Miño-Sil.</p>

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