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.

A Late Celtic Burial and a Series of Early Iron Age Occupation Sites at Waddon, Croydon, Surrey

1925 ◽  
Vol 5 (1) ◽  
pp. 80-82
Author(s):  
Prescott Row
Keyword(s):  
Sea Level ◽  
Iron Age ◽  
Early Iron Age ◽  
Wide Spread ◽  
The South ◽  
Ordnance Survey ◽  
Parish Church ◽  
North East ◽  
The North ◽  
South West

The old manor of Waddon is part of the Parish of Croydon and lies to the south west of the Parish Church of that town. Here at the head of the Wandle River there are many evidences of a wide spread population in prehistoric times and the fields on the lower slopes of the North Downs which steadily rise from Waddon Station towards Purley are littered with flakes and have yielded many implements.The particular site to which I draw the attention of the Society, and indicate as the Cedars Estate, is easily reached by the bridle path running westward by Waddon Mill on the banks of the river, and the section under discussion, is the north east corner of the plot marked as Brandy Bottle Hill on the six inch Ordnance Survey. A hillock of Thanet sand here rises and extends eastward over the next field, the top of which is some 140 feet above sea level and makes a vantage spot with a good look out, over the wide stretches of the level plain running north from the present course of the Wandle river, in early times no doubt a stretch of marshland. It is still called Waddon Marsh.

scholarly journals The Igneous Complex of Y Foel Fras, Caernarvonshire

1922 ◽  
Vol 59 (3) ◽  
pp. 134-139 ◽  
Author(s):  
Norman L. Silvester
Keyword(s):  
Coastal Plain ◽  
Geological Survey ◽  
The South ◽  
The West ◽  
Igneous Complex ◽  
North West ◽  
North East ◽  
The North ◽  
South West

The area under consideration is a portion of the mountain massif bounded on the east by the Conway River, on the north by the narrow coastal plain between Conway and Bangor, and on the west and south by the popular tourist route through Nant.-Francon pass by Llyn Ogwen and down the Afon Llugwy to Bettws y coed. The investigation includes the horseshoe-shaped ring of mountains, of which the highest is Y Foel Frâs (3,091 feet), surrounding the upper course of the Aber River (Cwm yr Afon Goch). To the north-west this igneous complex is bounded by the precipitatious crags over which the above stream descends by leaps and bounds, forming the well-known Aber Falls. Upon Sheet 78, south-east of the old Geological Survey map the area is coloured as “Massive intrusive felspathic rocks”, surrounding two oval patches indicated as “Greenstones”, whilst a further elongated patch of the latter forms the south-west boundary. The north-east boundary is limited by the Aber-Llanbedr fault. Besides the hog-backed summit of Y Foel Frâs, the area includes the similarly outlined summits of Y Drosgl West (2,483 feet), Yr Arryg (2,875 feet), Llwydmor Bâch (2,256 feet), and the more rugged summits of Bera Mawr (2,587 feet), Bera Bâch and Llwydmor (2,749 feet).

Part VI. The Cyclopean Terrace Building and the Deposit of Pottery beneath It

1954 ◽  
Vol 49 ◽  
pp. 267-291
Author(s):  
Elizabeth B. Wace
Keyword(s):  
Contour Line ◽  
The South ◽  
Main Road ◽  
North West ◽  
North East ◽  
The North ◽  
South West

The Cyclopean Terrace Building lies to the north-west of the Lion Gate on the northern end of the Panagia Ridge and faces almost due west across the valley of the Kephissos and modern main road from Corinth to Argos. It lies just below the 200 m. contour line, and one terrace below the houses excavated in 1950–51 by Dr. Papadimitriou and Mr. Petsas to the east at the same end of the ridge. The area contains a complex of buildings, both successive and contemporary, and in view of the discovery of structures both to the south-west and, by the Greek Archaeological Service, to the north-east it is likely that this whole slope was covered by a portion of the outer town of Mycenae. This report will deal only with the structure to which the name Cyclopean Terrace Building was originally given, the so-called ‘North Megaron’, supported by the heavy main terrace wall.The excavation of this structure was begun in 1923. The main terrace wall was cleared and two L.H. IIIC burials discovered in the top of the fill in the south room. In 1950 it was decided to attempt to clear this building entirely in an endeavour to find out its date and purpose. The clearing was not, however, substantially completed until the close of the 1953 excavation season, and this report presents the available evidence for the date as determined by the pottery found beneath the building; the purpose is still a matter for study, though various tentative conclusions can be put forward.

VI.—The Salt Deposits of Dax and the Pyrenees

1904 ◽  
Vol 1 (6) ◽  
pp. 265-272
Author(s):  
P. W. Stuart-Menteath
Keyword(s):  
Rock Salt ◽  
Mineral Water ◽  
Igneous Rocks ◽  
Thermal Springs ◽  
Salt Formation ◽  
The South ◽  
North West ◽  
The North ◽  
South West ◽  
Salt Deposits

On the rail to Biarritz the roots of the Pyrenees first appear at Dax, and are accompanied by those ophites and thermal springs which are special features of the entire chain. Vast deposits of salt, to whose first development I contributed, have added an important industry to the resources of this ancient capital of Aquœ Tarbelliœ, where the exact harness depicted on Roman medals is still characteristic of every cart. Beneath the existing ditch of the Roman fortifications rock-salt was accidentally discovered by a boring for mineral water, and the salt is now worked at three miles to the south-east, and is indicated by springs for a distance of seven miles. The deposit is known to be about 100 feet in thickness, but is of unknown depth beneath the existing borings.Along the entire outskirts of both sides of the Pyrenees similar salt deposits abound, and they are often similarly accompanied by igneous rocks.The salt formation of Dax is distinctly limited by the valley of the Adour, which here ceases to wander among the sands of the plain, and is suddenly and sharply diverted along a tectonic depression, running towards the Pyrenees in a south-west direction. Precisely parallel to this course, in the Cretaceous and Tertiary rocks of the Pyrenees, there runs, at a dozen miles to the north-west, the most remarkable example known of a tectonic valley sunk beneath the ocean. The Gouf de Capbreton, sinking with steep sides to over 3,000 feet beneath the even bottom of the Atlantic skirt, and affording evidence of igneous rocks in its surroundings and in the irregularities of its floor, is a perfect analogue of the neighbouring tectonic portion of the Adour.

The West Court at Perachora

1967 ◽  
Vol 62 ◽  
pp. 353-371
Author(s):  
J. J. Coulton
Keyword(s):  
Short Distance ◽  
Sixth Century ◽  
East Side ◽  
The South ◽  
The West ◽  
Rock Face ◽  
North East ◽  
The North ◽  
South West ◽  
East And West

About 10 metres south-west of the sixth-century temple of Hera Akraia at Perachora, and nearly due west of the little harbour lies the small courtyard previously known as the ‘Agora’. Since its purpose is not known, it will here be non-committally referred to as the West Court. It was first excavated in 1932, and more fully, under the supervision of J. K. Brock, in 1933, but it was not entirely cleared until 1939, and it was at that time that the Roman house which stood in the middle of the court was demolished. The West Court is discussed briefly (under the name of ‘Agora’) in Perachora 1 and in the preliminary reports of the Perachora excavations. Short supplementary excavations were carried out in 1964 and 1966 to examine certain points of the structure.In shape the West Court is an irregular pentagon, about 24 metres from north to south and the same from east to west (Fig. 1; Plate 91 a, b). It is enclosed on the west, north, and on part, at least, of the east side by a wall of orthostates on an ashlar foundation. For a short distance on either side of the south corner, the court is bounded by a vertically dressed rock face which is extended to the north-east and west by walls of polygonal masonry. At the south-west corner the west orthostate wall butts against the polygonal wall, which continues for about 0·80 m. beyond it and then returns north for about 8 metres behind it.

Excavation of a homestead of the Roman era at Halangy Down, St. Mary's, Isles of Scilly, 1950

1955 ◽  
Vol 35 (3-4) ◽  
pp. 187-198 ◽  
Author(s):  
Paul Ashbee
Keyword(s):  
Material Culture ◽  
Ordnance Survey ◽  
North West ◽  
North East ◽  
The North ◽  
South West ◽  
West Part ◽  
Neighbouring Island ◽  
The Hill ◽  
The Village

Halangy Down (fig. 1) is the lower precipitous slope of the decline from Telegraph Hill (Ordnance Survey B.M. 166. 3 ft.) to the sea at Halangy Porth and Point. Halangy Down and the earlier chambered tomb upon the crest are often referred to locally as ‘Bants Carn’. The true ‘Bants Carn’ is a considerable rock outcrop dominating Halangy Point. This escarpment faces Crow Sound, which separates the north-west part of St. Mary's from the neighbouring island of Tresco. The hill-side is sheltered by the mass of Telegraph Hill from inclement weather from the north-east and east, but is fully exposed to the south-west and west.The existence of an ancient village site here has long been known in the islands. At the close of the last century, the late Alexander Gibson cleared away the underbrush from one of the more prominent huts and made a photographic record of its construction. Shortly after, the late G. Bonsor, of Mairena del Alcor, near Seville, in addition to excavating the chambered tomb, noted a considerable midden together with traces, of prehistoric occupation exposed in the cliffs of Halangy Porth just below the village site. Dr. H. O'Neill Hencken noted Bonsor's description of the midden, and, as nothing was known at the time of the material culture of the ‘village’, he associated the two.

scholarly journals A plutonic diorite complex in the north of the Fiskenæsset region

1976 ◽  
Vol 73 ◽  
pp. 72-80
Author(s):  
W.R Fitches
Keyword(s):  
The Body ◽  
Main Body ◽  
The South ◽  
North East ◽  
The North ◽  
South West ◽  
West Part ◽  
Preliminary Account ◽  
East End

A thick diorite-monzodiorite sheet over 2 km in length and up to 600 m in width (fig. 35) is exposed at 50°25'E and 63°55'N, about 7 km south of Qeqertaussaq by Kangerdluarssûngûp taserssua. Several diorite dykes, some over 10 m in thickness, tie parallel to the main body and up to 300 m from it. The north-east end of the body is covered by superficial deposits whilst the south-west part has not yet been mapped out. This is therefore a preliminary account, including petrography, fie1d relations and some geochemistry, and more information will become available during subsequent field seasons.

scholarly journals An ultrabasic pipe in the eastern Sukkertoppen region, southern West Greenland

1980 ◽  
Vol 100 ◽  
pp. 69-73
Author(s):  
R.P Hall
Keyword(s):  
Granulite Facies ◽  
The South ◽  
The West ◽  
West Side ◽  
West Greenland ◽  
North East ◽  
The North ◽  
South West ◽  
Unusual Occurrence ◽  
Anorthosite Complex

An unusual occurrence of ultrabasic material was located in the eastern Sukkertoppen region during the reconnaissance mapping programme of 1977, the findings of which were described by Allaart et al. (1978). It occurs on a small exposure on the west side of a north-pointing peninsula in the middle of the large nunatak Majorqap alangua (65°53'N, 50°40'W), to the north-east of the Majorqaq valley (Hall, 1978, fig. 21). The area is composed predominantly of a suite of granulite facies granitic gneisses which contain numerous enclaves of pyroxene-bearing amphibolites, and locally anorthositic and gabbroic rocks similar to those seen in the Fiskenæsset anorthosite complex (Myers, 1975). The gneisses in the centre af the nunatak are highly irregular in orient at ion, occupying the complex interseclion af closures af at least two major fold phases. A belt af amphibolitcs forms the cliff at the south-west tip af Majorqap alangua. Related rocks occur in arnphibolite facies in the acea around the lakc Qardlit taserssuat immediately to the soulh (Hall, 1978).

III.—On the Discovery of a Quartzose Conglomerate at Caldon Low, Staffs

1919 ◽  
Vol 6 (2) ◽  
pp. 59-64 ◽  
Author(s):  
J. Wilfrid Jackson ◽  
W. E. Alkins
Keyword(s):  
The South ◽  
North West ◽  
Good Fortune ◽  
North East ◽  
The North ◽  
South West ◽  
Limestone Quarries ◽  
Strong Joint

During a visit to the limestone quarries at Caldon Low last September we had the good fortune to discover an interesting exposure of a quartzose conglomerate containing numerous fossils. The bed was exposed in a strong joint-face running approximately N.N.W. to S.S.E., at the northern extension of the quarry on the north-west flank of the Low, just beyond the mineral line of the North Staffordshire Railway. The altitude is about 900 feet O.D. The conglomerate apparently extended some little distance to the south-west before the opening of the quarry, as we ascertained that some 20 or 30 yards had been removed in gaining access to the limestone behind. It appears to extend for some distance round the flank of the Low towards the north-east.

A study of apparent angles of emergence at Marathon Ontario from the Lake Superior data

1965 ◽  
Vol 55 (2) ◽  
pp. 405-416
Author(s):  
R. F. Mereu
Keyword(s):  
Particle Motion ◽  
Lake Superior ◽  
Seismic Events ◽  
The South ◽  
West Side ◽  
North East ◽  
The North ◽  
South West

Abstract A three component array of Willmore seismometers and a hydrophone were used to record the seismic events at Marathon, Ontario during the Lake Superior crustal experiment of 1963. The first part of each record was digitized and from an analysis of the particle motion diagrams, apparent angles of emergence of the seismic rays were determined. It was found that these angles can be used to distinguish between P2 and Pn waves. When the shot distance was less than 220 km., the first arrivals emerged with an apparent angle of 40-50°. As the shot distance was increased beyond 220 km., the rays emerged with an apparent angle of 51-70°. The apparent velocities of the (40-50) and the 51-70°) rays were 6.6 km/sec and 8.2 km/sec respectively. Further analysis of the results showed that the Moho below Marathon dipped downwards toward the south west with an angle of approximately 4°, indicating that the crust is considerably thicker on the south west side of Marathon than on the north east. A study of the ray azimuths gave some evidence of the presence of lateral inhomogeneities in the crust.

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