… OF SHERDS AND SOIL AND SEALING LAYERS, OF COBBLING AND COINS…

Summary. From 1985 to 1987 an experiment was conducted alongside an excavation to examine the effect of trampling on cobbled layers, and to see if the movement of small objects could change their stratigraphic relationships. An experimental area was excavated and backfilled with soil and a cobbled layer containing plastic markers, flower pot sherds and coins. The area, part of a path, was subjected to daily trampling, and was excavated after seventeen months, using normal excavation methods; all the soil was dry sieved. The results show varying recovery rates and horizontal movements for different types of object, and demonstrate the need for further investigation of the causes and implications of differential movement of buried objects.     

HONEY AND DRIPPING: NEOLITHIC FOOD RESIDUES FROM RUNNYMEDE BRIDGE

Summary. This paper illustrates the prospects for a fuller understanding of ancient foodstuffs by applying a range of analytical techniques to charred food residues on pottery. The relevant techniques of organic chemistry are briefly described. First results on Neolithic material from Runnymede stand amongst few for prehistoric Europe. They demonstrate the potential importance of such analyses both in redressing imbalances present at the site level and in opening wider issues, such as the functions attached to particular pot forms. The identification of beeswax in a British Neolithic context prompts an enquiry into the nature of early bee management and the suggestion that 'forest beekeeping'may have been widespread in temperate Neolithic Europe.     

Experimental study of the effect of variation in in‐situ stress on capillary residual trapping during CO2 geo‐sequestration in sandstone reservoirs

During a geo‐sequestration process, CO₂ injection causes an increase in reservoir pore pressure, which in turn decreases the reservoir net effective stress. Changes in effective stress can change all the reservoir and cap‐rock properties including residual saturations. This article presents the results of an experimental work carried out to understand the potential change in the volumes of residually trapped CO₂, while the porous medium tested underwent change in the net effective stress under in‐situ reservoir conditions of pore pressure and temperature. The experimental results obtained show that an initial 1725 psi (11.9 MPa) decrease in the net effective pressure caused 1.4% reduction in the volumes of residually trapped CO₂, while another 1500 psi (10.3 MPa) reduction caused a further 3.2% drop in the residual saturation of CO₂.     

Estimation of Soil Erosion Using Field and Modelling Approaches in an Undisturbed Arnhem Land Catchment,Northern Territory,Australia

An assessment of slope erosion at Tin Camp Creek catchment, Arnhem Land, Northern Territory, Australia, was carried out using the fallout environmental radioisotope caesium‐137 (¹³⁷Cs) as an indicator of soil erosion status, two numerical models (SIBERIA and the Revised Universal Soil Loss Equation (RUSLE)) and erosion pins. This undisturbed drainage basin is situated in the seasonally wet‐dry tropics, with high energy storms and a mean annual rainfall of 1389 mm. Tin Camp Creek catchment is unaffected by European agriculture or pastoral activities, but often experiences fire during the dry season. Two transects were sampled for ¹³⁷Cs in 2002 and 2004, and two models were used to convert ¹³⁷Cs measurements into soil loss estimates. Two methods using the theoretical Profile Distribution Model (PDM) gave net soil redistribution rates between +2.72 and –22.19 t ha^?1 yr^?1 and +2.95 and –24.06 t ha^?1 yr^?1, respectively, while an Australian empirical model (AEM) for uncultivated soils produced estimates between +1.84 and –7.00 t ha^?1 yr^?1 (negative values indicate soil erosion, positive, deposition). The RUSLE gave estimated soil losses for the two transects of approximately 10 t ha^?1 yr^?1, while the SIBERIA model produced values between 0.5 and 2 t ha^?1 yr^?1 for the transects and between 3.5 and 11 t ha^?1 yr^?1 for the total catchment. Average net soil losses of 14 and 15 t ha^?1 yr^?1 for the total catchment and slopes, respectively, were measured by erosion pins. The soil losses in the catchment are similar to those for some other transects in the Northern Territory and the Kimberley region of Western Australia (measured by the ¹³⁷Cs AEM), even though these areas are affected by pastoral activities. This may be at least partly explained by erosion in Tin Camp Creek catchment during high intensity rainstorms at the commencement of the wet season, especially if the slopes have been affected by fire during the previous dry season.     

A Powerful Place of Pictland: Interdisciplinary Perspectives on a Power Centre of the 4th to 6th Centuries ad

OUR UNDERSTANDING of the nature of late and post-Roman central places of northern Britain has been hindered by the lack of historical sources and the limited scale of archaeological investigation. New work at Rhynie, Aberdeenshire, Scotland (NJ 49749 26345), has begun to redress this through extensive excavation and landscape survey. This has revealed a Pictish central place of the 4th to 6th centuries ad that has European connections through material culture, iconography and site character. In addition to reviewing the place-name and historical context, this article outlines preliminary reflections on five seasons of excavation and survey in the Rhynie landscape. The article also provides a detailed consideration of chronology, including radiocarbon dating and Bayesian statistical analysis. The results reveal the multi-faceted nature of a major, non-hillfort elite complex of Pictland that comprised a high-status residence with cult dimensions, a major centre for production and exchange, and a contemporary cemetery. A series of sculptured stones stood in association with the settlement and cemetery and the iconography of the stones, along with the wider archaeological evidence, provides a rich dataset for a renewed consideration of the central places of early medieval northern Britain with broader implications for the nature of power and rulership in late and post-Roman Europe.     

‘A Tiny Little Footnote in History’: Conservative Centre Forward

In May 1985, two years after he had returned to the back benches, Francis Pym launched the first organised display of dissent within the parliamentary Conservative Party against Margaret Thatcher's leadership: Conservative Centre Forward. Those Conservative MPs who joined the group were very much believers in One Nation Conservatism. Conservative Centre Forward survived for barely a week after going public; it rapidly collapsed amid accusations of disloyalty and inept leadership. The group proved to be a short-lived experiment which achieved little of note and exposed those who were involved to widespread ridicule. Yet, it was precisely because Conservative Centre Forward collapsed so quickly and achieved so little that it was significant. In its own way, the short life of the group provided a revealing commentary upon the character of the mid-1980s Conservative Party. It was a party which, on the one hand, was moving inexorably to the right and therefore ever further away from the values of One Nation Conservatism which Conservative Centre Forward espoused. On the other hand, it was a party which was still traditional enough to view open displays of dissent, of whatever magnitude, as a threat to the unity upon which its continued electoral success depended.