XXX.—The Dolerite Isles of the North Minch

1931 ◽  
Vol 56 (3) ◽  
pp. 753-766 ◽  
Author(s):  
Frederick Walker
Keyword(s):  
Sea Level ◽  
Igneous Rocks ◽  
Present Communication ◽  
North East ◽  
The North ◽  
The Subject ◽  
Sketch Map

North of Skye the waters of the Minch conceal Tertiary igneous rocks, probably of great interest, the nature of which may be surmised only from the study of a few small skerries or islands projecting above sea-level. The group of the Shiant Isles is the best known and most interesting of these, and has been described elsewhere; but the more southerly islets, which form the subject of the present communication, are not without importance in themselves, besides forming a useful geological connecting link between the Shiants and Trotternish. As shown in the sketch map (fig. 1), they comprise the little archipelago a league off the Trotternish coast, which will be referred to as the Fladda group; the island of Trodday, two miles north-east of Rudha Hunish in Skye, and three small rocks or skerries lying close to the track of the Harris mail steamer.

scholarly journals Keurbooms Estuary floods and sedimentation

2015 ◽  
Vol Volume 111 (Number 11/12) ◽  
Author(s):  
Eckart H. Schumann ◽  
Keyword(s):  
Sea Level ◽  
Vegetative State ◽  
Ocean Waves ◽  
Exit Channel ◽  
North East ◽  
The North ◽  
Longshore Drift ◽  
The Subject ◽  
Major Floods ◽  
First Time

Abstract The Keurbooms Estuary at Plettenberg Bay lies on a wave-dominated, microtidal coast. It has a dune-topped sandy barrier, or barrier dune, almost 4 km long, with a narrow back-barrier lagoon connected to its source rivers, the Keurbooms and Bitou. The estuary exits to the sea through this barrier dune, and it is the geomorphology and mouth position in relation to floods, which is the subject of this paper. Measurements of rainfall, water level, waves and high- and low-tide water lines were used to analyse the mouth variability over the years 2006–2012. Two major floods occurred during this time, with the first in November 2007 eroding away more than 500 000 m3 of sediment. The new mouth was established at the Lookout Rocks limit – the first time since 1915. The second flood occurred in July 2012 and opened up a new mouth about 1 km to the north-east; high waves also affected the position of the breach. The mouth has a tendency to migrate southwards against the longshore drift, but at any stage this movement can be augmented or reversed. The effectiveness of floods in breaching a new mouth through the barrier dune depends on the flood size and the nature of the exit channel in the back-barrier lagoon. Other factors such as ocean waves, sea level, vegetative state of the dune and duration of the flood are also important and can determine where the breach occurs, and if the new mouth will dominate the old mouth.

The Metamorphosed Limestones and Associated Contaminated Igneous Rocks of the Carlingford District, Co. Louth

1932 ◽  
Vol 69 (5) ◽  
pp. 209-233 ◽  
Author(s):  
G. D. Osborne
Keyword(s):  
Igneous Rocks ◽  
The South ◽  
Ordnance Survey ◽  
Igneous Complex ◽  
North East ◽  
The North ◽  
South West ◽  
Carboniferous Limestone ◽  
Contamination Effects

THE Carlingford-Barnave district falls within the boundaries of Sheet 71 of the Ordnance Survey of Ireland, and forms part of a broad promontory lying between Carlingford Lough on the north-east and Dundalk Bay on the south-west. The greater part of this promontory is made up of an igneous complex of Tertiary age which has invaded the Silurian slates and quartzites and the Carboniferous Limestone Series. This complex has not yet been investigated in detail, but for the purposes of the present paper certain references to it are necessary, and these are made below. The prevalence of hybrid-relations and contamination-effects between the basic and acid igneous rocks of the region is a very marked feature, and because of this it has been difficult at times to decide which types have been responsible for the various stages of the metamorphism.

3. Notes on a Cist discovered at Parkhill, Dyce, Aberdeenshire, in October 1881

1882 ◽  
Vol 11 ◽  
pp. 405-409
Author(s):  
William Ferguson
Keyword(s):  
North East ◽  
The North ◽  
The Subject

The station of Parkhill, on the Great North of Scotland Railway, is seven and a half miles from Aberdeen, and the cist which is the subject of these notes was situated in a mound of gravel and sand to the north-east of, and within one or two hundred yards of, the station. This is the second which has been uncovered at the same spot,—a previous one having been disclosed in 1867, the contents of which—a vase and some bones—are preserved in the Anatomical Museum, Marischal College, University of Aberdeen.

scholarly journals IV.—The Glacial Deposits of Northern Pembrokeshire

1906 ◽  
Vol 41 (1) ◽  
pp. 53-87
Author(s):  
T. J. Jehu
Keyword(s):  
Igneous Rocks ◽  
Earth’S Crust ◽  
The West ◽  
Great Abundance ◽  
Glacial Deposits ◽  
North East ◽  
The North ◽  
Earth's Crust

The area embraced in this paper consists of that part of Pembrokeshire which lies to the north and north-east of St Bride's Bay. Bounded on the west by St George's Channel and on the north by Cardigan Bay, it extends to the north-east as far as the mouth of the river Teifi, near Cardigan.That part of the country which lies in the immediate neighbourhood of St David's has, through the laborious researches of the late Dr Hicks and others, become well-known to geologists, and may now be regarded as classic ground. The solid geology of this promontory has given rise to much discussion, and has, perhaps, attracted more attention than that of any other part of the Principality. The reason for this great interest is to be sought in the facts that the rocks of this area are of a very great antiquity, and that the sedimentary series contain the remains of some of the earliest organic forms yet found in the earth's crust, whilst the igneous rocks are also displayed in great abundance and variety, and present us, in the words of Sir Archibald Geikie, with “the oldest well-preserved record of volcanic action in Britain.”

Woodeaton

1917 ◽  
Vol 7 ◽  
pp. 98-119 ◽  
Author(s):  
M. V. Taylor
Keyword(s):  
Sea Level ◽  
The South ◽  
North East ◽  
The North ◽  
Dry Seasons ◽  
The Village

Woodeaton is a small Oxfordshire parish, four miles north-east of the centre of Oxford city and a little west of the wide marshy level of the ‘Plain of Otmoor.’ It stands on a low, detached and rounded hill, 315 feet above sea level, and 120 feet above Otmoor. In old days it must have been difficult of access, for Otmoor spreads away to the east of it; low pastures along the river Cherwell close it in on the north and west, while south-westwards, too, the land is low-lying and marshy. Even to the south-east a marshy hollow separates it from the wooded slopes of Beckley and Elsfield, once part of Shotover Forest. However, the well-known Roman road which connects Dorchester (Oxon.) with Alchester, and which passes along the foot of Shotover, and traverses the village of Beckley and the plain of Otmoor, runs within two miles of Woodeaton; in dry seasons it may have helped those who wished to get to the spot.

Louis Hunton (1814-1838) - English Pioneer in Ammonite Biostratigraphy

1984 ◽  
Vol 3 (1) ◽  
pp. 58-68 ◽  
Author(s):  
H. Torrens ◽  
T. Getty
Keyword(s):  
Family Business ◽  
Scientific Work ◽  
North East ◽  
The North ◽  
The Family ◽  
The Subject ◽  
First Time ◽  
Practical Demonstration ◽  
Open Cast

In any discussion of the historical development of what was later to be named Biostratigraphy it is often assumed that a modern basis for the subject had already been reached by the cumulative work in the subject up to 1815; culminating in that of William Smith (1769-1839) and Alexandre Brongniart (1770-1847). But to this time fossils had only been used to identify (and discriminate between) often repetitive lithological units or to establish a relationship between rock units in different areas. The practical demonstration that particular lithological units could be regularly subdivided with significant consequences, on the basis of their contained fossils was a later achievement over several generations. One of the first to free stratigraphical palaeontology from such a lithological control was the forgotten Englishman Louis Hunton (1814-1838). In this paper Hunton's origins from a successful alum making family in the north-east of Yorkshire in the north of England and his short life and scientific work are described for the first time. The family business of alum making from the highly fossiliferous local alum shales, which were extracted open-cast, directly introduced Hunton to stratigraphical palaeontology. He followed up this work by study in London, where his pioneering paper was read to the Geological Society of London in 1836. He died less than 2 years later but had helped lay a foundation for major biostratigraphic advances by his insistence that only fossils collected in situ should be used in such work and then that the species, of especially ammonites, in his Yorkshire strata had particularly limited and invariable relative positions within that lithological sequence. His work is also compared with that of his contemporary W.C. Williamson and the conclusion reached that Hunton, because of his emphasis in the merits of ammonites, deserves more to be remembered as a pioneer of Jurassic biostratigraphy.

scholarly journals Late glacial to early Holocene development of southern Kattegat

1969 ◽  
Vol 28 ◽  
pp. 21-24 ◽  
Author(s):  
Carina Bendixen ◽  
Jørn Bo Jensen ◽  
Ole Bennike ◽  
Lars Ole Boldreel
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Late Glacial ◽  
Last Deglaciation ◽  
Isostatic Rebound ◽  
North East ◽  
The North ◽  
Tectonically Active ◽  
The Last Deglaciation ◽  
The Øresund Region

The Kattegat region is located in the wrench zone between the Fennoscandian shield and the Danish Basin that has repeatedly been tectonically active. The latest ice advances during the Quaternary in the southern part of Kattegat were from the north-east, east and south-east (Larsen et al. 2009). The last deglaciation took place at c. 18 to 17 ka BP (Lagerlund & Houmark-Nielsen 1993; Houmark-Nielsen et al. 2012) and was followed by inundation of the sea that formed a palaeo-Kattegat (Conradsen 1995) with a sea level that was relatively high because of glacio-isostatic depression. Around 17 ka BP, the ice margin retreated to the Øresund region and meltwater from the retreating ice drained into Kattegat. Over the next millennia, the region was characterised by regression because the isostatic rebound of the crust surpassed the ongoing eustatic sea-level rise, and a regional lowstand followed at the late glacial to Holocene transition (Mörner 1969; Thiede 1987; Lagerlund & Houmark-Nielsen 1993; Jensen et al. 2002a, b).

scholarly journals A hillfort complex in Myślibórz in the Sudety Mountains

2020 ◽  
Vol 72 (2) ◽  
Author(s):  
Ewa Anna Lisowska ◽  
Sylwia Rodak
Keyword(s):  
Sea Level ◽  
Warning System ◽  
Spatial Arrangement ◽  
Archaeological Sites ◽  
Early Medieval ◽  
The Past ◽  
North East ◽  
The North ◽  
Sudety Mountains ◽  
Defensive Sites

The Myślibórz Gorge, located within the Kaczawy Foothills, is well-known to environmentalists and scholars studying the past. The investigations launched in the 1990s made it possible to determine the chronology of three of the archaeological sites in this area. In 2018, two hillforts – on the Kobylica and Golica hills – were investigated. Czech literature classifies such hillforts as the ostrožna-type. The excavations of these hillforts made it possible to establish to date them between the 9th and 10th centuries.The hillforts were located on hilltops with similar altitudes above the sea level, less than 200 m from each other. Such a spatial arrangement made it possible to control the gateway to the Myślibórz Gorge from the north-east. Reasons for developing a defensive system in the southern part of the gorge are obscure, as is the role that two other early medieval hillforts played in it. Was it simply a warning system, or rather part of a comprehensive network of defensive sites?

Trioctahedral minerals in the soil-clays of north-east Scotland

1950 ◽  
Vol 29 (208) ◽  
pp. 72-84 ◽  
Author(s):  
G. F. Walker
Keyword(s):  
Clay Minerals ◽  
Decomposition Products ◽  
Widespread Distribution ◽  
North East ◽  
The North ◽  
Soil Clays ◽  
The Subject ◽  
Soil Clay

This paper deals with a series of soil-clay minerals which have a widespread distribution in the north-east of Scotland. The original member is a biotite-like mica which breaks down readily in the soil into (i) a vermiculite or (ii) a montmorillonite, depending on the soil-forming conditions operating. Apart from this 'clay biotite' and its decomposition products, the main crystalline constituents of the Scottish soil-clays are a member of the kaolinite group and illite (' clay muscovite'). Iron and aluminium oxides are present in all the clays in the amorphous condition, but crystalline varieties are scarce. The distribution of the minerals and their relationship to the various soft-forming factors will form the subject of a separate communication; here, the nature of the clay minerals and their interrelationships are considered.

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