IV.—The Fluvio-glacial Gravels of the Thames Valley

1916 ◽  
Vol 3 (3) ◽  
pp. 111-117
Author(s):  
R. M. Deeley

At about 55 miles we reach the Hendon Lobe fan. At Dollis Hill the base of the fluvio-glacial beds lies at a height of about 200 feet, whilst their upper limit at Hendon is about 280 feet. On Finchley Hill to the north-east the Boulder-clay lies between the levels of 240 and 340 feet. This was a small lobe, and the fluvio-glacial fan may have sloped rapidly towards the fluvio-glacial gravels of the main stream. On the section, Fig. 2, the heights are shown without correction for slope towards the River Thames.

1937 ◽  
Vol 15 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Allan H. H. Fraser ◽  
David Robertson

1. To determine the upper limit of the abomasal worm infestation of healthy lambs was the main object of the investigation. The results show that a lamb slaughtered fat before or shortly after weaning and therefore presumably a healthy lamb, may contain up to 2,100 Haemonchus and up to 4,670 Ostertagia.2. Infestation with Haemonchus conlortus is negligible until August.3. Infestation with Ostertagia remains almost steady from early May until mid-September.4. Infestation with Trichostrongylus axei occurs from May until mid-September, but is never a heavy one.5. The evidence suggests, but does not prove, that in mid-summer there is a wide difference in the infestation of single and twin lambs.6. The results, so far as they affect the seasonality of infestation are, strictly speaking, applicable only to the flock of the Duthie Experimental Stock Farm, but are probably true for the North-East area of Scotland.


2001 ◽  
Vol 203 ◽  
pp. 344-346
Author(s):  
T. Yokoyama ◽  
K. Akita ◽  
T. Morimoto ◽  
K. Inoue ◽  
J. Newmark

We find an important piece of evidence for magnetic reconnection inflow in a flare on March 18, 1999. The flare occurred on the north-east limb, displaying a nice cusp-shaped soft X-ray loop and a plasmoid ejection typical for the long-duration-events. As the plasmoid is ejected, magnetic reconnection occurs at the disconnecting point. A clear ingoing pattern toward the magnetic X-point is seen. The velocity of this apparent motion is about 5 km sec−1, which is an upper limit on reconnection inflow speed. Based on this observation, we derive the reconnection rate as MA = 0.001 − 0.03, where MA is a Alfvén Mach number of the inflow.


1864 ◽  
Vol 1 (4) ◽  
pp. 150-154
Author(s):  
Harry Seeley

Ely stands on a hill extending somewhat beyond the city as a ridge to the north; and a mile north-east of the Cathedral, at a spot variously named Roslyn or Roswell Hole, its flank is reached at a well-known pit, where the Kimmeridge Clay is dug for mending the river-banks; and the excavation shows some Boulder-clay and Chalk. What the relative positions and relations of these latter deposits may be has been long disputed; some holding that the Chalk is there in sitû, let down by a fault; others maintaining that it is merely such a drifted mass, included in the Boulder-clay, as those which form so strange a feature in the Drift of the Norfolk Coast.† Professor Sedgwick has long been convinced that this latter view is a groundless hyothesis; for when the railway was made from Ely to Lynn, it exposed at about 100 yards off a section showing Kimmeridge Clay and Chalk side by side, and Boulder-clay between them; so the conclusion inevitably followed that there had been a great fault; letting down the Chalk for at least two or three hundred feet. This section was still to be seen in the spring of 1860, when I examined it. The faulted faces of both stratified formations were perfectly erect, parted by a column of Boulder-clay, some twelve feet wide, which from a distance looked like a basaltic dyke.


1927 ◽  
Vol 64 (11) ◽  
pp. 501-502
Author(s):  
H. G. Mantle

At the commencement of the year 1925 the Post Office authorities, for the purpose of laying down telephone lines, were making a trench from the corner of Rochester Road (Camden Town) north-eastward up the Camden Road and across it into and along Murray Street in the direction of St. Paul's Road, and were laying ducts at the depth of about 10 ft. The distance from the corner of Rochester Road to a point opposite the corner of Murray Street is 160 yards, the direction north-east, with a slight rise in that direction. Previously the London County Council tramway cable ducts had been laid down to the depth of 3 ft. 6 in., but below this level the whole of the ground excavated was in an undisturbed state. The trench was 2 ft. 7 in. wide. A man-hole had been sunk at the corner of Rochester Road, another at the end of the works on the Camden Road, and a third opposite to it at the corner of Murray Street, all to a depth from the surface of more than 12 ft. In fact the Camden Road man-hole was sunk to the depth of 15 ft. 6 in., so as to enable the excavators to tunnel under the road to Murray Street in order that the stream of traffic along the Camden Road might not be disturbed.


1933 ◽  
Vol 7 (2) ◽  
pp. 188-198
Author(s):  
A. Raistrick

For a distance of four miles north of Newbiggin-on-Sea, Northumberland, the coast presents a stretch of low cliffs and headlands of sandstone, alternating with shallow bays flanked by sand-dunes, the dunes usually resting visibly on a low boulder clay cliff, not usually rising more than 20 ft. above high tide level. The river Lyne reaches the coast now about two miles north of Newbiggin, at Lyne Sands, but in preglacial and early post-glacial time, entered the sea at Newbiggin bay. The old course of the river is occupied by the “Carrs,” a strip of swampy peat, proved at several places by boring, to reach a depth of over twenty feet and to be underlain by river gravel on boulder clay. The basal layers of the peat are proved by pollen analysis to be of latest Boreal age. Between this old channel and the sea, lies Newbiggin Moor, between 30 ft. and 50 ft. OD. a wide stretch of sandstone covered by thin soil, and occasional peat and blown sand. In early Boreal time this would be a headland prolonged southward between the sea on the east and the river Lyne on the west. At a subsequent period the Lyne has broken through its present course to the sea, north of Lyne Sands. The foreshore is made up by a wide stretch of sandstone, flats and skerries overlain by boulder clay, making the low cliff in the southern part, with sand dunes resting directly on the clay. Northward the sandstone gradually rises and towards Cresswell Point makes the whole cliff, with only a thin boulder clay cover on top.


1985 ◽  
Vol 51 (1) ◽  
pp. 181-213 ◽  
Author(s):  
R. Inman ◽  
D. R. Brown ◽  
R. E. Goddard ◽  
D. A. Spratt

Round houses and an enclosure, surviving parts of a nucleated settlement on boulder clay terrain at Roxby (near Staithes, north-east Yorkshire), discovered from the air in 1972, were excavated 1973–81. Most were dated to the immediately pre-Roman Iron Age, but one round house, standing in an area of marks of former cross-ploughing, had native Romano-British pottery, and in the last phase of ditch silting, sherds of sixth century AD Anglo-Saxon stamped ware. The economy was based on mixed farming, but two of the Iron Age houses also contained iron working comprising both smelting and smithing. These houses also yielded fragments of jet and glass and were interpreted as a repair workshop, rather than a production unit. Great structural detail had been preserved and was recorded. The houses were architecturally different and represent a significant addition to the prehistoric round house data. They lie in that part of the township of Roxby which escaped medieval ploughing, and probably represent a fraction of the total original settlement. This and other data in north-east Yorkshire show that an economy based on settled mixed farming, not on semi-nomadic pastoralism, was widespread across the boulder clay encircling the North York Moors.


It is now generally recognised that the Benettitales occupied a dominant position in the vegetation during part of the Mesozoic period, and the elucidation of their reproductive structures is therefore of special importance. An additional stimulus has been given to the study of their remains by the suggestion, on the part of some botanists, that in the morphological features of these plants we may find a solution of the problem of the origin of the Angiosperms. The Estuarine beds of North East Yorkshire which had provided some of the earlier specimens had remained for a long time unexplored until the chance discovery of the beautiful Williamsonia spectabilis flower by Prof. Nathorst. Subsequently to Nathorst’s discovery I commenced a systematic examination of the Jurassic plant-beds of, Yorkshire, and Dr. Halle paid a visit to the coast in 1910 which resulted in the discovery of many important specimens. The previously described specimens belonging to the genus Williamsonia were found in the Lower Estuarine beds near Whitby, Runswick and Marske, while other well preserved examples were derived from the Middle Estuarine beds at Cloughton Wyke. The examples now to be described were obtained from the famous Gristhorpe plant-bed, which had not previously—so far as I know—yielded any examples of fertile structures clearly referable to the Bennettitales. The Gristhorpe bed is a layer of bluish-grey shaly clay, 1-3 feet thick, and containing very beautifully preserved plant remains. It is exposed on the shore at the northern end of Gristhorpe Bay, which lies between Scarborough and Filey; it runs up into the cliff (Bed Cliff) towards the north, but is here covered by Boulder Clay and unworkable. About four or five hundred yards farther it descends again and is found on the shore at the extreme southern (or south-eastern) end of Cayton Bay, but soon runs out to sea once more. It would appear that most of the fine specimens collected in former days by Williamson, Bean and other workers from this locality were obtained on the Gristhorpe Bay side, and this may perhaps account for the non-discovery of such recently discovered genera as Williamsoniella, Eretmophyllum and Caytonia We must also remember that coast-erosion is proceeding at a rapid rate in Yorkshire, and that the parts of the bed now exposed may well contain new plants, for in a distance of a few yards the assemblage of forms may change completely. It is unnecessary to describe the strata in which the plant-bed occurs, but it has been shown by Williamson that they belong to the Middle Estuarine Series of the Middle Jurassic.


Antiquity ◽  
1976 ◽  
Vol 50 (200) ◽  
pp. 216-222
Author(s):  
Beatrice De Cardi

Ras a1 Khaimah is the most northerly of the seven states comprising the United Arab Emirates and its Ruler, H. H. Sheikh Saqr bin Mohammad al-Qasimi, is keenly interested in the history of the state and its people. Survey carried out there jointly with Dr D. B. Doe in 1968 had focused attention on the site of JuIfar which lies just north of the present town of Ras a1 Khaimah (de Cardi, 1971, 230-2). Julfar was in existence in Abbasid times and its importance as an entrep6t during the sixteenth and seventeenth centuries-the Portuguese Period-is reflected by the quantity and variety of imported wares to be found among the ruins of the city. Most of the sites discovered during the survey dated from that period but a group of cairns near Ghalilah and some long gabled graves in the Shimal area to the north-east of the date-groves behind Ras a1 Khaimah (map, FIG. I) clearly represented a more distant past.


1999 ◽  
Vol 110 (5-6) ◽  
pp. 455-463 ◽  
Author(s):  
S. Güvenç ◽  
Ş Öztürk
Keyword(s):  

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