The Changing Face of PEQ

Abstract

The spectacular relief of the sandstone inselbergs is maintained by an interplay of geological structure and weathering/erosion processes, in that vertical joints and faults provide the foci along which most weathering and erosion take place. There are three major varieties of sandstone breakdown; the first is failure of large rock masses along vertical joints, leading to rockfall. Associated with this process is the mechanical breaking of falling blocks upon impact, in some cases right down to the origjnal sand grains. Rockfall maintains vertical or steep slopes, provided basal talus is removed. The second variety is liberation of small blocks by weathering along closely-spaced joints and bedding planes. Rock prone to this style of erosion tends to be less steep and may have basal slopes buried by rubble. The third variety is grain by grain weathering by solution of cement. This process is the most fundamental, as it not only wears away the surfaces but attacks joints, leading to the processes described above. Grain by grain weathering is slowed or prevented on some surfaces by development of oxide rinds, particularly where run-off is concentrated.

These processes result in deposition of debris at slope bases, but in most cases the debris is quickly reduced to sand and removed by wind and water. Relatively clean slope bases allow slopes to retreat parallel to themselves. Where debris collects faster than it is reduced to sana, slope angles tend to decline until they reach the angle of repose of the debris.

Differences in structural expression of the various lithological units result in differing erosional characteristics. The Saleb Formation is typified by relatively gentle slopes littered with debris, due to thinly spaced joints. The Ishrin Formation, witll widely spaced vertical joints, is typified by rockfall of large masses. It is the major cliff-former. Grain by grain weathering, influenced by variations in varnish development, has produced spectacular tafoni on some Ishrin cliffs. The Disi Formation is extremely friable and although slopes are relatively gentle they are mostly rubble free. The Disi in many places forms rounded domelike shapes which may be due to exfoliation along pressure-relief joints. The Um Sahm Formation is highly fractured and similar in appearance to the Saleb.

Igneous rocks, where exposed below the sandstones, are undergoing chemical weathering, particularly along joints. The results are tors, tafoni, and large amounts of grüss.

The desert floor between inselbergs is in some places a bare bedrock surface with an integrated drainage network, and in other places a sand or playa surface. Running water seems to have been a major agent in shaping the floor, but is less important now than in the past. Transportation of sand by wind is common but there is no evidence for significant eolian aggradation or degradation at the present time.

A minimum rate of surface retreat by grain by grain weathering is 5 cm./1,000 years, based on weathering ofNabataean ruins. Overall slope retreat should be significantly greater, due to added effects of rockfall and removal of blocks by running water.     

The Changing Face of Neolithic and Bronze Age Ireland: A Big Data Approach to the Settlement and Burial Records

This paper synthesizes and discusses the spatial and temporal patterns of archaeological sites in Ireland, spanning the Neolithic period and the Bronze Age transition (4300–1900 cal BC), in order to explore the timing and implications of the main changes that occurred in the archaeological record of that period. Large amounts of new data are sourced from unpublished developer-led excavations and combined with national archives, published excavations and online databases. Bayesian radiocarbon models and context- and sample-sensitive summed radiocarbon probabilities are used to examine the dataset. The study captures the scale and timing of the initial expansion of Early Neolithic settlement and the ensuing attenuation of all such activity—an apparent boom-and-bust cycle. The Late Neolithic and Chalcolithic periods are characterised by a resurgence and diversification of activity. Contextualisation and spatial analysis of radiocarbon data reveals finer-scale patterning than is usually possible with summed-probability approaches: the boom-and-bust models of prehistoric populations may, in fact, be a misinterpretation of more subtle demographic changes occurring at the same time as cultural change and attendant differences in the archaeological record.     

Graffiti Revelations and the Changing Meanings of Kilmainham Gaol in (Post)Colonial Ireland

Kilmainham Gaol (1796–1924) became the de facto holding center for political prisoners in Ireland by the mid-nineteenth century. Officially closing in 1910, it reopened a number of times for “emergencies” before its final closure after the Irish Civil War (1922–23). After 1924 it lay abandoned until reopening as a heritage attraction in the early 1960s. It was taken into state protection in 1986. Using a range of graffiti assemblages predominantly dating from 1910 onwards this paper will explore the “imperial debris” of contested narratives of meaning, ownership, and identity that the prison walls continue to materialize.     

Changing Harvest Dates in Post-medieval Ireland

Abstract

During the last three centuries, agricultural writers and other commentators on Irish life frequently criticised Irish farmers for the late date at which they began to harvest both hay and grain. This paper will outline the reasoning behind these criticisms and the defence given by farmers in return. It will be argued that the rationality of common practice is demonstrated by the willingness of farmers to change the dates of harvest once changes in other practice made this desirable. The physical evidence for change will be described, and the paper will conclude with a discussion of possible implications of this for archaeology.     

The Left(s) and Nationalism(s) in contemporary Western Europe

This article introduces our themed section on The Left(s) and Nationalism(s), which provides a comparative analysis of the relationship between nationalism and different left-wing parties in Western Europe. It highlights the innovative comparative perspectives offered by this themed section, which not only concerns a series of different geographical cases studies but also involves the ideological plurality of the Left. The larger research question that our contributors address is how different left-wing parties have dealt with the inherent ideological tension between the universality claimed by the Left and the particularism inherent in nationalism, as a doctrine and a principle of political legitimacy. The article stresses three main contributions of our themed section: (1) Western European left-wing parties do engage with the themes of nationalism and nationhood, but they often rely on convenient silence to solve some of the contradictions with their progressive ideology. (2) None of these parties have formulated thick versions of the respective national identities. (3) State-wide left-wing parties have used instrumental conceptions of nationhood to address the challenge of separatist parties, but only with mixed results.     

Railway Architecture: The Great Northern Railway (Ireland) at Dundalk

ABSTRACT

This article is adapted from the dissertation ‘Railway Architecture: The Great Northern Railway (Ireland) at Dundalk’, completed by Siobhan Osgood for the MPhil in Art History: Art + Ireland, where it was awarded a distinction. The study provides an historical analysis in the context of architectural development and broader railway culture in Ireland to provide an interpretation and understanding of the use of polychromatic yellow, red and black brickwork to create a visual identity for railway architecture. The use of accented colours to pick out key features is repeated across a series of buildings, thus creating a distinctive style of ‘brick-branding’. These are most prominent in the town of Dundalk, where the GNRI had its central engineering works at the halfway point on the Dublin to Belfast mainline and at the point where the Irish North line extended west and north. The buildings were each intricately designed by the GNRI's first chief engineer, William Hemingway Mills, a second-generation railway engineer who merged the roles of architect and engineer using an amalgamation of architectural designs from his earlier career in Derby, Scotland, Mexico and Spain. Mills thus created his own ‘Millsian’ style of industrial architectural design.     

世界水族馆 科尔特斯海

正世界水族馆大约500万年前,频繁的地震和火山活动撕裂了墨西哥大陆的西部,形成了加利福尼亚半岛和本土间的巨大鸿沟,太平洋海水灌入,从而产生了如今的科尔特斯海(Sea of Cortez),又叫加利福尼亚湾(Gulf of California);持续的火山喷发形成了科尔特斯海中诸多的小岛。墨西哥征服者埃尔南·科尔特斯听闻这座海域的岛上遍地黄金,海里到处是珍珠,于是派遣了弗朗西斯科·乌略亚前去勘探,结果自然是没有找到珍宝,不过乌略亚还是用他上司的名字——科尔特斯命名了这片海域。     

The Journal of Religious History 1960–2010: The Changing Face of Religious History over Fifty Years

The fiftieth anniversary of this journal offers an opportunity to reflect on both its history and that of the larger field of religious history. At its foundation, the journal drew inspiration from the approach to the history of religion taken by Lucien Febvre and other French Annalistes, with their emphasis on including religion as an integral part of the analysis of the past. Though the journal continued to publish a good deal of ecclesiastical history as more traditionally understood, these founding ideals have continued to shape the character of the journal. The increasing interest in the history of mentalities (partly due to the decline of Marxist historiography) has heightened an interest in the history of religion in ways which have proved increasingly congruent with the journal's founding ideals.     

Correspondence(s) in The Pen Friend by Ciaran Carson

In The Pen Friend published in 2009, Ciaran Carson draws upon the form of the epistolary novel, albeit in a somewhat non-conformist way. How to convey reality through language, or languages – photography, painting among others – is once more the purpose of the writer, even though subject and form have been renewed. This article aims at showing how the reader is transported into a world full of correspondences, a world transfigured by the power of language.