Introduction

When, about fifteen years ago, I along with many other new workers in the field of rock magnetism, started to read ourselves into the subject of continental drift, we found a complex, controversial and perplexing situation, with a very long history. In about 1620, Francis Bacon, in his search for regularities in nature, wrote: ‘...the very configuration of the world itself in its greater parts presents Conformable Instances which are not to be neglected. Take for example Africa and the region of Peru with the continent stretching to the Straits of Magellan, in each of which tracts there are similar isthmuses and similar promontories; which can hardly be by accident. Again, there is the Old and New W orld; both of which are broad and extended towards the north, narrow and pointed towards the south.’ Though Bacon thought the similarity of shape could not be by accident, he did not explicitly suggest that the two continents might have once been together. This hypothesis seems to have been first mentioned by von Humboldt about 1800: he also suggested a possible mechanism as to how the continents might have drifted apart:

1929 ◽  
Vol 19 (1) ◽  
pp. 67-87 ◽  
Author(s):  
Jocelyn Toynbee

The paintings in the triclinium of the Villa Item, a dwelling-house excavated in 1909 outside the Porta Ercolanese at Pompeii, have not only often been published and discussed by foreign scholars, but they have also formed the subject of an important paper in this Journal. The artistic qualities of the paintings have been ably set forth: it has been established beyond all doubt that the subject they depict is some form of Dionysiac initiation: and, of the detailed interpretations of the first seven of the individual scenes, those originally put forward by de Petra and accepted, modified or developed by Mrs. Tillyard appear, so far as they go, to be unquestionably on the right lines. A fresh study of the Villa Item frescoes would seem, however, to be justified by the fact that the majority of previous writers have confined their attention almost entirely to the first seven scenes—the three to the east of the entrance on the north wall (fig. 3), the three on the east wall and the one to the east of the window on the south wall, to which the last figure on the east wall, the winged figure with the whip, undoubtedly belongs.


1897 ◽  
Vol 29 (2) ◽  
pp. 205-226
Author(s):  
Robert Brown

Amongst the most remarkable instances of the result of careful observation and systematized thought which Western Asia has given to the world at large, are the Signs of the Zodiac, and the ancient extra-zodiacal constellation-figures, northern and southern; and by ‘ancient’ I mean those which have been enshrined for all future time in the Phainomena of Aratos. Of the Twelve Signs I shall only speak incidentally. It is now many years since Ideler and Guigniaut, contrary to the views of Letronne, arrived at the correct conclusion that the Signs of the Zodiac came, with so much else of archaic thought and civilization, from, the Euphrates Valley; and, having firmly established themselves in Hellenic usage, were afterwards carried by Greek conquerors as far as India in the east and Egypt in the south. But, although modern research has supplied an immense amount of material for the purpose, it is remarkable that the classic work of Ideler still gives the best account of the constellation-figures and their various stars. Surely, then, it is time that an effort was made to utilize in a connected form some at least of the results of subsequent investigation; and, although the inquiry, like all such, is progressive, and, like all researches into the ancient and archaic past, is beset with numerous difficulties, yet the principles to be applied and the general outlines of the subject are clear and distinct.


1998 ◽  
Vol 8 (1) ◽  
pp. 21-41 ◽  
Author(s):  
Beatrice Forbes Manz

Temür has been many things to many people. He was nomad and city-builder, Turk and promoter of Persian culture, restorer of the Mongol order and warrior for the spread of Islam. One thing he was to all: a conqueror of unequalled scope, able to subdue both the vast areas of nomad power to the north and the centres of agrarian Islamic culture to the south. The history of his successors was one of increasing political fragmentation and economic stress. Yet they too won fame, as patrons over a period of brilliant cultural achievement in Persian and Turkic. Temür's career raises a number of questions. Why did he find it necessary to pile conquest upon conquest, each more ambitious than the last? Having conceived dreams of dominion, where did he get the power and money to fulfill them? When he died, what legacy did Temür leave to his successors and to the world which they tried to control? Finally, what was this world of Turk and Persian, and where did Temür and the Timurids belong within it?


2003 ◽  
Vol 28 ◽  
Author(s):  
Barendra Purkait

The Ganga-Brahmaputra river system together forms one of the largest deltas in the world comprising some 59570 sq km. The waterpower resources of the Brahmaputra have been presumed to be the fourth biggest in the world being 19.83 x 103 m3s1. The entire lower portion of the Brahmaputra consists of a vast network of distributary channels, which are dry in the cold season but are inundated during monsoon. The catchment area of the entire river is about 580,000 sq km, out of which 195,000 sq km lies in India. The maximum discharge as measured at Pandu in 1962 was of the order of 72800 m3 s-1 while the minimum was 1750 m3 s-1 in 1968. The drainage pattern in the valley is of antecedent type while the yazoo drainage pattern is most significant over the composite flood plain to the south of the Brahmaputra. The Brahmaputra valley is covered by Recent alluvium throughout its stretch except a few isolated sedimentary hills in the upper Assam, inselbergs/bornhardt of gneissic hills in the Darrang, Kamrup and Goalpara districts and a few inlying patches of Older Alluvium in the Darrang and Goalpara districts. The basin is very unstable. The present configuration of the basin is the result of uplift and subsidence of the Precambrian crystalline landmasses. Four geotectonic provinces can be delineated in the N-E India through which the Brahmaputra flows. These are bounded by major tectonic lineaments such as the basement E-W trending Dauki fault, a NE-SW trending structural feature of imbricate thrusts known as 'belt of Schuppen' and the NW-SE trending Mishmi thrust. Hydrogeologically, the Brahmaputra basin can be divided into two distinct categories, viz(a) dissected alluvial plain and (b) the inselberg zone. The first category is rep resented in the flood plain extending from the south of Sub-Himalayan piedmont fan zone in the north to right upto the main rock promontory of Garo Hills and Shillong Plateau. The inselberg zone is characterized by fractured, jointed and weathered ancient crystalline rocks with interhill narrow valley plains, consisting of thin to occasionally thick piles of assorted sediments. From the subsurface lithological data, two broad groups of aquifers are identified. These are i) shallow water table and ii) deeper water table or confined ones, separated by a system of aquicludes. The shallow aquifer materials, in general, consist of white to greyish white, fine grained micaceous sand and the thickness ranges from 1.2 to 10.3 m. The sand and clay ratio varies from 1: 2.5 to 1:26. The bedrock occurs at depth ranges of 30.4 to 39.5 m. The materials of the deeper aquifers comprise grey to greyish white, fine to medium grained sand. The sand and clay ratio varies from 1:2 to 1:7. The effective size of the aquifer materials varies from 0.125 to 0.062 mm with uniformity co-efficient around 4.00, porosity 38 to 42%, co-efficient of permeability 304 to 390 galls per day/0.3m2. The ground water is mildly alkaline with pH value 6.5 to 8.5, chloride 10 to 40 ppm, bi-carbonate 50 to 350 ppm, iron content ranges from a fraction of a ppm to 50 ppm. Total dissolved solids are low, hardness as CaCo3 50 to 300 ppm, specific conductance at 25 °C 150 to 650 mhos/cm. The yield from shallow aquifers is 1440 litres to 33750 litres/hour and for deeper aquifers ~ 1700 litres/hour at a drawdown of 13.41 m, specific capacity 21 litres/minute. The temperatures of ground water are 23°-25° C during winter, 24°-26° C during pre-monsoon and 27°- 28° C during peak monsoon. The general hydraulic gradient in the north bank is 1:800 whereas in the south bank it is 1: 300-400 The Tertiary sediments yield a range of water from 200 to 300 l.p.m whereas the yield from the Older Alluvium is 500 to 700 1.p.m. The estimated transmissibility and co-efficient of storage is of the order of ~ 800 1.p.m/ m and 8.2 x 10-3 respectively. Depths to water levels range from 5.3 to 10m below land surface (b.l.s). In the Younger or Newer Alluvium, ground water occurs both under water table and confined conditions. Depths to water levels vary from ground level to 10 m b.l.s. Depth to water ranges from 6 m b.l.s. to 2 m above land surface. The yield of the deep tubewells ranges from 2 to 4 kl/minute for a drawdown of 3 m to 6 m. The transmissibility of the aquifers varies from 69 to 1600 l.p.m/m and the storage co-fficient is of the order of 3.52 x 10-2.


2018 ◽  
Vol 24 (2) ◽  
pp. 85-110
Author(s):  
Joanna Kulwicka-Kamińska

The religious writings of the Tatars constitute a valuable source for philological research due to the presence of heretofore unexplored grammatical and lexical layers of the north borderland Polish language of the 16th-20th centuries and due to the interference-related and transfer-related processes in the context of Slavic languages and Slavic-Oriental contacts. Therefore the basis for linguistic analyses is constituted by one of the most valuable monuments of this body of writing – the first translation of the Quran into a Slavic language in the world (probably representing the north borderland Polish language), which assumed the form of a tefsir. The source of linguistic analyses is constituted by the Olita tefsir, which dates back to 1723 (supplemented and corrected in the 19th century). On the basis of the material that was excerpted from this work the author presents both borderland features described in the subject literature and tries to point the new or only sparsely confirmed facts in the history of the Polish language, including the formation of the north borderland Polish language on the Belarusian substrate. Research involves all levels of language – the phonetic-phonological, morphological, syntactic and the lexical-semantic levels.


2021 ◽  
Author(s):  
Alexandra Rodriguez ◽  
Giuseppe La Gioia ◽  
Patricia Le Quilliec ◽  
Damien Fourcy ◽  
Philippe Clergeau

Global change, which regroups global warming, landscape transformations and other anthropic modifications of ecosystems, has effects on populations and communities and produces modifications in the expansion area of species. While some species disappear, other ones are beneficiated by the new conditions and some of them evolve in new adapted forms or leave their ancient distribution area. As climate change tends to increase the temperature in several regions of the world, some species have been seen to leave areas in equatorial regions in order to join colder areas either towards the north of the northern hemisphere or towards the south of the southern one. Many birds as have moved geographically in direction to the poles and in many cases they have anticipated their laying dates. Actually, two tit species that use to lay their eggs in a period that their fledging dates synchronize with the emerging dates of caterpillars are now evolving to reproductive in periods earlier than before the climate change. Several species are reacting like that and other ones are moving to the north in Europe for example. Nevertheless, and very curiously, European starling, Sturnus vulgaris, populations are behaving on the contrary: their laying dates are moving towards later spring and their distribution area is moving towards the south. In this study we explore and discuss about different factors that may explain this difference from other birds.


2020 ◽  
Vol 91 (5) ◽  
pp. 535-552
Author(s):  
Astrid Wood

In the post-colonial context, the global South has become the approved nomenclature for the non-European, non-Western parts of the world. The term promises a departure from post-colonial development geographies and from the material and discursive legacies of colonialism by ostensibly blurring the bifurcations between developed and developing, rich and poor, centre and periphery. In concept, the post-colonial literature mitigates the disparity between cities of the North and South by highlighting the achievements of elsewhere. But what happens when we try to teach this approach in the classroom? How do we locate the South without relying on concepts of otherness? And how do we communicate the importance of the South without re-creating the regional hierarchies that have dominated for far too long? This article outlines the academic arguments before turning to the opportunities and constraints associated with delivering an undergraduate module that teaches post-colonial concepts without relying on colonial constructs.


2020 ◽  
pp. 12-27
Author(s):  
Kenneth P. Miller

This chapter argues that the polarization of Texas and California can be traced to their origins. The chapter examines the two states’ common experiences as possessions of Spain and Mexico; their mid-nineteenth century American settlement, conquest, and admission as states; and their opposite positions on the questions of slavery and secession. Although the two origin stories have similarities, they also bear crucial differences. Texas’s bloody independence struggle and its decade-long career as an independent nation were different from California’s experience as a remote maritime province inundated by a global gold rush and its rapid admission to the Union. Most critically, Texas was settled by American southerners and was oriented toward the South, while California was settled by migrants from across the nation and around the world and was oriented toward the North. These differences became imprinted in the states’ identities and helped shape their futures.


Author(s):  
Arthur Holmes ◽  
H. F. Harwood

The suite of dikes that forms the subject of this paper is bounded on the south from Sleights Moor (south of Whitby) to Dalston (south of Carlisle) by the well-known series of dikes known collectively as the Cleveland-Cockfield-Armathwaite dike, and on the north by the nearly parallel and more continuous Acklington dike which stretchesfrom Bondicarr near Coquet Island across the southern margin of the Cheviots into Scotland.


1958 ◽  
Vol 26 ◽  
pp. 30-62 ◽  
Author(s):  
R. G. Goodchild ◽  
J. M. Reynolds ◽  
C. J. Herington

Cyrene's largest religious building, the great Temple of Zeus on the north-eastern hill of the city, has been the subject of several explorations. Its cella was partially dug out by Smith and Porcher in 1861, and was completely cleared of soil by the late Giacomo Guidi in 1926, in the excavation which brought to light the famous head of Zeus, pieced together from over a hundred fragments. Then, in the years 1939–1942, fuller work was carried out by Dr. Gennaro Pesce, who published a detailed report with admirable promptness. Despite the interruptions caused by the North African campaigns of the World War, Pesce was able to clear the greater part of the Temple and its fallen peristasis. At the conclusion of his work only the opisthodomos remained unexcavated, although much fallen stone still encumbered the pronaos and the eastern portico.


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