Sidney Campbell Dyke, founder of the A.C.P., celebrates his 80th birthday on 5 September 1966. We all wish him continued good health and many happy returns of the day. In the early years of the A.C.P. everyone who attended our meetings knew Dyke personally: one might almost say, intimately. But nowadays there must be many of our members who know him only by sight or by reputation. Therefore it ...

We investigated the impact of managed retreat on mercury (Hg) biogeochemistry at a site subject to diffuse contamination with Hg. We collected sediment cores from an area of land behind a dyke one year before and one year after it was intentionally breached. These sediments were compared to those of an adjacent mudflat and a salt marsh. The concentration of total mercury (THg) in the sediment d...

Sidney Campbell Dyke, founder of the Association of Clinical Pathologists and for many years a member of the Advisory Board of this Journal, died on 3 March. He was 88. Obituary notices have already been published in the British Medical Journal and Lancet (22 March). These have recorded Dyke's distinguished scholastic career, his wide range of scientific interests, his motives in founding the A...

The analysis of Anisotropy of Magnetic Susceptibility (AMS) is a powerful and rapid technique to examine the preferred orientations of mineral (magnetic) fabrics and can indicate the nature of a magma transport (vertical or lateral). The relationship between magnetic fabric and geometry of a dyke swarm enables us to understand magma emplacement processes. Depending on the mutual relationship of...

in taleghan, olivine basalt-basaltic andesite dykes as part of tertiary mamgmatic activities in central and western alborz zone, intruded into both karaj formation and late eocene-oligocene volcanic rocks. these dykes have similar geochemical characteristic which suggest that they are originated from a common source. on the primitive mantle normalized spider diagram, the dykes are characterized...

Previous studies have shown that the 2.04 Ga Kangâmiut dyke swarm of SW Greenland was injected into an active tectonic environment associated with the formation of the Nagssugtoqidian orogenic belt. Major and trace element modelling of the swarm shows that its chemical evolution was controlled by simple clinopyroxene–plagioclase fractionation. However, such trends — although typical of continen...

DESCRIPTION An 18-month-old baby presented with decreased movements of right upper and lower limb since birth. The birth history revealed perinatal insult in the form of delayed cry that was followed by right-sided complex partial seizures. The patient exhibited delayed milestones. There is no history of cyanosis, jaundice or head injury in the neonatal period. At present, the patient is unable...

How much magma needs to be added to a shallow magma chamber to cause rupture, dyke injection, and a potential eruption? Models that yield reliable answers to this question are needed in order to facilitate eruption forecasting. Development of a long-lived shallow magma chamber requires periodic influx of magmas from a parental body at depth. This redistribution process does not necessarily caus...

For over a centmy, Dyke marsh along the Potomac River just south of Alexandria, VA, has been a favorite site for natural history studies. Despite earlier attempts at diking to create agricultural land and dredging for sand and gravel, the remaining marsh represents the last major tidal freshwater wetland on the upper Potomac River, and is now owned and maintained by the National Park Seivice as...

the right side. All the findings favoured diagnosis of Dyke David -Masson syndrome. Significant contrasting feature in our patient than the patient described in the journal was the presence of left sided cerebellar atrophy (Figure 1). DykeDavidoff-Masson syndrome associated with crossed cerebellar atrophy (CCA) has been previously described in some pat ients . There are two schools of thought r...