Epilogue: recommendations of the Workshop Session

1986 ◽  
Vol 88 ◽  
pp. 291-298
Author(s):  
I.N. McCave
Keyword(s):  
Continental Margin ◽  
Focus Of Attention ◽  
Regional Studies ◽  
East Side ◽  
Workshop Session ◽  
Research Papers ◽  
The West ◽  
Norwegian Sea ◽  
Downward Flux ◽  
Organic Productivity

Following the presentation of research papers, a group of invited participants examined the opportunities for further research in the Rockall Channel area. The chairman suggested that fundamental oceanographic problems which were well displayed in the area should be the focus of attention rather than regional studies for their own sake. It is indeed fortunate that a region so close to home ports should show many features whose examination would lead to general advances in oceanography. The area has an important slope current on its east side and influx of Norwegian Sea Overflow along the west. These produce differing sedimentary signatures. The downward flux of energy and rapid flux of particles are perhaps responsible for seasonality shown in reproduction of benthos. The continental margin shows significant upwelling and high organic productivity

The Cedar Mountain, Nevada, earthquake of December 20, 1932*

1934 ◽  
Vol 24 (4) ◽  
pp. 345-384 ◽  
Author(s):  
Vincent P. Gianella ◽  
Eugene Callaghan
Keyword(s):  
Sierra Nevada ◽  
Horizontal Displacement ◽  
Vertical Displacement ◽  
Relative Movement ◽  
East Side ◽  
Owens Valley ◽  
The West ◽  
Horizontal Movement ◽  
San Andreas

Summary The Cedar Mountain, Nevada, earthquake took place at about 10h 10m 04s p.m., December 20, 1932. It was preceded by a foreshock noted locally and followed by thousands of aftershocks, which were reported as still continuing in January 1934. No lives were lost and there was very little damage. The earthquake originated in southwest central Nevada, east of Mina. A belt of rifts or faults in echelon lies in the valley between Gabbs Valley Range and Pilot Mountains on the west and Cedar Mountain and Paradise Range on the east. The length of this belt is thirty-eight miles in a northwesterly direction, and the width ranges from four to nine miles. The rifts consist of zones of fissures which commonly reveal vertical displacement and in a number of places show horizontal displacement. The length of the rifts ranges from a few hundred feet to nearly four miles, and the width may be as much as 400 feet. The actual as well as indicated horizontal displacement is represented by a relative southward movement of the east side of each rift. The echelon pattern of the rifts within the rift area indicates that the relative movement of the adjoining mountain masses is the same. The direction of relative horizontal movement corresponds to that along the east front of the Sierra Nevada at Owens Valley and on the San Andreas rift.

Anorogenic magmatism and the Grenvillian Orogeny

1989 ◽  
Vol 26 (3) ◽  
pp. 479-489 ◽  
Author(s):  
Brian F. Windley
Keyword(s):  
United States ◽  
South America ◽  
Continental Margin ◽  
South Atlantic ◽  
Island Arc ◽  
The South ◽  
The West ◽  
Continental Block ◽  
Grenvillian Orogeny ◽  
Alkaline Complexes

The Grenvillian Orogeny was preceded by extensive anorogenic volcanism and plutonism in the period 1500–1300 Ma in the form of rhyolites, epizonal granites, anorthosites, gabbros, alkaline complexes, and basic dykes. An analogue for the mid-Proterozoic anorogenic complexes is provided by the 2000 km by 200 km belt of anorogenic complexes in the Hoggar, Niger, and Nigeria, which contain anorthosites, gabbros, and peralkaline granites and were generated in a Cambrian to Jurassic rift that farther south led to the formation of the South Atlantic. An analogue for the 1 × 106 km2 area of 1500–1350 Ma rhyolites (and associated epizonal granites) that underlie the mid-continental United States is provided by the 1.7 × 106 km2 area of Jurassic Tobifera rhyolites in Argentina, which were extruded on the stretched continental margin of South America immediately preceding the opening of the South Atlantic. The mid-Proterozoic complexes were intruded close to the continental margin of the Grenvillian ocean and were commonly superimposed by the craton-directed thrusts that characterized the final stages of the Grenvillian Orogeny. The bulk of the Keweenawan rift and associated anorogenic magmatism formed about 1100 Ma at the same time as the Ottawan Orogeny in Ontario, which probably resulted from the collision of the island arc of the Central Metasedimentary Belt attached to the continental block in the east with the continental block to the west. The most appropriate modern equivalent would be the Rhine Graben, which formed at the same time as the main Alpine compression.

scholarly journals The Soviet mapping of Poland – a brief overview

2019 ◽  
Vol 23 (1) ◽  
pp. 5-15 ◽  
Author(s):  
Alexander J. Kent ◽  
Martin Davis ◽  
John Davies
Keyword(s):  
Twentieth Century ◽  
Regional Studies ◽  
The West ◽  
City Plan

Abstract The Soviet military mapping project was the most comprehensive cartographic endeavour of the twentieth century. The resulting maps have been commercially available to the West since at least 1993, when a Latvian business first offered Soviet plans of Western cities for sale at the 16th International Cartographic Conference in Cologne, Germany. Covering the globe at a range of scales, Soviet military maps provide a fascinating – if disconcerting – view of familiar territory with a striking aesthetic. But they also provide a substantial untapped geospatial resource, often with an unparalleled level of topographic detail. This paper gives an overview of the Soviet global military mapping programme and its coverage of Poland, including the 1:25,000-scale city plan of Warsaw (printed in 1981). By illustrating the extensive topographic symbology employed at various scales of mapping, it suggests how these maps may offer scope for regional studies and how their cartographic language can provide some solutions for addressing the ongoing challenges of mapping the globe.

scholarly journals LINEARIZATION OF RELATIVE HUMIDITY OVER THE PACIFIC OCEAN ON THE EQUATORIAL LINE

2019 ◽  
Vol 16 (33) ◽  
pp. 630-640
Author(s):  
C. M. DÍEZ ◽  
C. J. SOLANO
Keyword(s):  
Pacific Ocean ◽  
Relative Humidity ◽  
Earth Science ◽  
Southern Oscillation ◽  
Correlation Coefficients ◽  
East Side ◽  
The West ◽  
Enso Events ◽  
The Pacific ◽  
The Pacific Ocean

The atmosphere system is ruled by the interaction of many meteorological parameters, causing a dependency between them, i.e., moisture and temperature, both suitable in front of any anomaly, such as storms, hurricanes, El Niño-Southern Oscillation (ENSO) events. So, understanding perturbations of the variation of moistness along the time may provide an indicator of any oceanographic phenomenon. Annual relative humidity data around the Equatorial line of the Pacific Ocean were processed and analyzed to comprehend the time evolution of each dataset, appreciate anomalies, trends, histograms, and propose a way to predict anomalous episodes such ENSO events, observing abnormality of lag correlation coefficients between every pair of buoys. Datasets were taken from the Tropical Atmosphere Ocean / Triangle Trans-Ocean Network (TAO/TRITON) project, array directed by Pacific Environmental Laboratory (PMEL) of the National Oceanic and Atmospheric Administration (NOAA), and the Japan Agency for Marine-Earth Science and Technology (JAMSTEC). All the datasets were processed, and the code was elaborated by the author or adapted from Mathworks Inc. Even occurrences of relative humidity in the east side of the Pacific Ocean seem to oscillate harmonically, while occurrences in the west side, do not, because of the size of their amplitudes of oscillations. This fact can be seen in the histograms that show Peak shapes in the east side of the ocean, and Gaussians in the west; lag correlation functions show that no one pair of buoys synchronize fluctuations, but western buoys are affected in front of ENSO events, especially between 1997-98. Definitely, lag correlations in western buoys are determined to detect ENSO events.

Adapting to Life Without the Legions

2005 ◽  
Author(s):  
David A. Hinton
Keyword(s):  
High Order ◽  
East Side ◽  
The West ◽  
Roman Britain ◽  
Imperial Authority ◽  
The North ◽  
Hadrian's Wall ◽  
Gold Coins ◽  
Subsequent Failure ◽  
Late Roman

If gold and silver are a measure of wealth, late Roman Britain was very rich. Hoards of coins, jewellery, and plate buried in the late fourth and early fifth centuries show that their owners’ lifestyle was coming to an end as central imperial authority broke down, troops were withdrawn from the island, villas fell into disuse, and towns lost their markets and trade. Raiders threatened by land and sea: Irish from the west, Pictish from the north, Frisian, Saxon, and others from the east; and as civic order broke down, the likelihood of robbery by people living south of Hadrian’s Wall grew worse. The hoards’ owners were right to worry, and their subsequent failure to retrieve their valuables must testify to many personal catastrophes. Hoards containing dishes, bowls, and spoons as well as coins and jewellery have been found on the east side of Roman Britain from Canterbury, Kent, in the south to Whorlton, Yorkshire, in the north. Further west, coin-hoards are quite plentiful, although none has any plate. Some contain jewellery, like one found in 1843 at Amesbury, Wiltshire, that included three silver finger-rings; in the same area, another hoard with eight gold coins and one of silver was found in 1990, apparently concealed in a pot around the year 405, to judge from the date of the latest coin. But as with plate so with jewellery, the contrast with the east is still considerable; Thetford, Norfolk, has gold finger-rings as well as ornamental chains, bracelets, and a buckle; Hoxne, Suffolk, has gold bracelets, and again chains, these with elaborate mounts. Some of the craftsmanship shown in these pieces is of a high order, that only well-off patrons could have afforded. The plate suggests displays of tableware by a society that set great store on being able to offer lavish feasts and entertainment. These late Roman treasures may be giving a slightly false impression of Britain’s prosperity. Silver was probably extracted from the same native deposits that yielded lead, so would have been more available than in most parts of the Empire. Some may also have entered Britain from Ireland, where evidence of Roman intervention is accumulating.

scholarly journals Fabric and Origin of Lateral Moraines, Bethartoli Glacier, Garhwal Himalaya, India

1978 ◽  
Vol 20 (84) ◽  
pp. 547-553 ◽  
Author(s):  
Gerald D. Osborn
Keyword(s):  
Garhwal Himalaya ◽  
Lateral Moraine ◽  
East Side ◽  
The West ◽  
West Side ◽  
Lateral Ridge ◽  
Moraine Ridge

AbstractUnusually strong till fabrics in lateral moraines of Bethartoli Glacier provide information on the genesis and growth of the moraines. On the west side of the valley, down-stream of the present glacier snout, several lateral moraine crests are juxtaposed. Because the crests generally become higher towards the valley axis, they must represent re-advances of the glacier rather than recessional stages. On the east side of the valley only a single lateral ridge is found; presumably the ridge is composed of debris from several glacial advances. On the eroded proximal flank of this ridge a strong fabric is visible; the plane defined by a- and b-axes of stones is parallel to the distal flank of the moraine ridge, indicating that the moraine grew mainly by accretion of debris on to its distal flank. On the eroded proximal flank of the innermost west-side ridge the equivalent fabric is weaker, suggesting that distal flank accretion was less significant and proximal flank accretion more significant than on the east side.

Appalachian Orogen in Canada

1979 ◽  
Vol 16 (3) ◽  
pp. 792-807 ◽  
Author(s):  
Harold Williams
Keyword(s):  
Continental Margin ◽  
Eastern North America ◽  
Early Paleozoic ◽  
The West ◽  
Late Precambrian ◽  
Northwest Africa ◽  
Iapetus Ocean ◽  
History Of ◽  
Appalachian Orogen ◽  
Andean Type

The Appalachian Orogen is divided into five broad zones based on stratigraphic and structural contrasts between Cambrian–Ordovician and older rocks. From west to east, these are the Humber, Dunnage, Gander, Avalon, and Meguma Zones.The westerly three zones fit present models for the development of the orogen through the generation and destruction of a late Precambrian – Early Paleozoic Iapetus Ocean. Thus, the Humber Zone records the development and destruction on an Atlantic-type continental margin, i.e., the ancient continental margin of Eastern North America that lay to the west of Iapetus; the Dunnage Zone represents vestiges of Iapetus with island arc sequences and mélanges built upon oceanic crust; and the Gander Zone records the development and destruction of a continental margin, at least in places of Andean type, that lay to the east of Iapetus.The Precambrian development of the Avalon Zone relates either to rifting and the initiation of Iapetus or to subduction and a cycle that preceded the opening of Iapetus. During the Cambrian Period, the Avalon Zone was a stable platform or marine shelf.Cambrian–Ordovician rocks of the Meguma Zone represent either a remnant of the continental embankment of ancient Northwest Africa or the marine fill of a graben developed within the Avalon Zone.Silurian and younger rocks of the Appalachian Orogen are mixed marine and terrestrial deposits that are unrelated to the earlier Paleozoic zonation of the system. Silurian and later development of the orogen is viewed as the history of deposition and deformation in successor basins that formed across the already destroyed margins and oceanic tract of Iapetus.

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