scholarly journals VII.—Experimental Researches in Mountain Building

1889 ◽  
Vol 35 (1) ◽  
pp. 337-357 ◽  
Author(s):  
Henry M. Cadell
Keyword(s):  
Detailed Examination ◽  
Geological Survey ◽  
Rock Masses ◽  
Mountain Building ◽  
North West ◽  
The North ◽  
Experimental Researches

Among most of the geologists who had of late years been engaged in investigating the structure of the North-West Highlands, and especially among those who did not concur in Murchison's explanation of the phenomena exhibited there, it was a growing belief that great overthrusts had been largely instrumental in producing the remarkable stratigraphical relations of the rock masses of that region. After a most careful detailed examination of the ground by the Geological Survey, the existence and importance of such thrusts was not only placed beyond a doubt, but a variety of additional remarkable structures were discovered, which open up new fields of investigation to the physical geologist.

scholarly journals III.—On the Metamorphic and Intrusive Rocks of Tyrone

1879 ◽  
Vol 6 (4) ◽  
pp. 154-160
Author(s):  
J. Nolan
Keyword(s):  
Detailed Examination ◽  
Geological Survey ◽  
The North ◽  
Intrusive Rocks ◽  
Metamorphic Series

The rocks I propose to describe in this paper belong to that great metamorphic series which occupies so large a portion of the north of Ireland, extending over most of the counties Tyrone, Londonderry, and Donegal. For the present I shall confine, my observations principally to that portion of them situated about the central parts of Tyrone, from the vicinity of Omagh eastwards and north-eastwards towards Slieve Gallion. This district has “Geological Report on Londonderry and parts of Tyrone and Fermanagh”; but as, during the progress of my work for the Geological Survey, I have had opportunities for a very detailed examination of it, I beg, briefly, to offer some further remarks and conclusions.

II.—Notes on the Pleistocene of the North-West Territories of Canada, North-West and West of Hudson Bay

1894 ◽  
Vol 1 (9) ◽  
pp. 394-399 ◽  
Author(s):  
J. Burr Tyrrell
Keyword(s):  
Geological Survey ◽  
Hudson Bay ◽  
North West ◽  
The Past ◽  
North Shore ◽  
The North ◽  
South West ◽  
North West Territories

In the extreme northernmost part of Canada, lying between North Latitudes 56° and 68° and West Longitudes 88° and 112°, is an area of about 400,000 square miles, which had up to the past two years remained geologically unexplored.In 1892 the Director of the Geological Survey of Canada sent the writer to explore the country north of Churchill River, and south-west of Lake Athabasca;in1893 the exploration was continued northward, along the north shore of Athabasca Lake

scholarly journals Investigations of detrital zircon, rutile and titanite from present-day Labrador drainage basins: fingerprinting the Grenvillean front

1969 ◽  
pp. 77-80
Author(s):  
Tonny B. Thomsen ◽  
Christian Knudsen ◽  
Alana M. Hinchey
Keyword(s):  
Newfoundland And Labrador ◽  
Sedimentary Basins ◽  
Geological Survey ◽  
Drainage Basins ◽  
Grenville Province ◽  
Collaborative Project ◽  
North West ◽  
North East ◽  
The North ◽  
Three Samples

A multidisciplinary provenance study was conducted on stream sediment samples from major rivers in the eastern part of Labrador, Canada (Fig. 1). Th e purpose was to fi ngerprint the sources that deliver material to the stream sediments and to the reservoir sand units deposited off shore in the sedimentary basins in the Labrador Sea. We used a multimineral U-Pb geochronological approach employing rutile and titanite in addition to zircon to obtain unbiased age data. Th e purpose of this was to characterise the diff erent igneous and metamorphic episodes that occurred in Labrador, which is an area with highly variable geology characterised by the Palaeoproterozoic south-eastern Churchill province in the north-west, the Archaean Nain plutonic suite in the north-east, the Palaeoproterozoic Makkovik province in the east and the Mesoproterozoic Grenville Province to the south. Th e fi eld work was carried out in 2012 and 2013 and the study is a collaborative project between the Geological Survey of Denmark and Greenland and the Geological Survey of Newfoundland and Labrador. In this paper we focus on three samples from the southern part of the study area where two parts of the Grenville orogeny are found (Fig. 1).

scholarly journals Field work in the north of the Ivisârtoq region, inner Godthåbsfjord, southern West Greenland

1983 ◽  
Vol 115 ◽  
pp. 49-56
Author(s):  
B Chadwick ◽  
M.A Crewe ◽  
J.F.W Park
Keyword(s):  
Field Work ◽  
Geological Survey ◽  
West Greenland ◽  
North West ◽  
The North ◽  
Field Investigations ◽  
New Findings ◽  
Host Rocks

The programme of field investigations in the north of the Ivisartoq region begun in 1981 by Chadwick & Crewe (1982) was continued in 1982. Julia Park began mapping the Taserssuaq granodiorite, its host rocks and the Ataneq fault in the north-west. Dur team was joined by D. Bellur, Geological Survey of India, nominally as an assistant. In this report we present only summary notes of new findings relevant to the interpretation of the geometry and chronology of this segment of the Archaean crust in southern West Greenland. We use the established terminology for the Archaean rocks of the Godthåbsfjord region.

V.—Note on two Cephalopods Obtained by Lieut.-Col. Skinner, R.A.M.C., from the Valley of the Tochi River on the North-West Frontier of India

1904 ◽  
Vol 1 (10) ◽  
pp. 490-493
Author(s):  
G. C. Crick
Keyword(s):  
British Empire ◽  
Geological Survey ◽  
The West ◽  
Lower Eocene ◽  
North West ◽  
The Core ◽  
Fossil Remains ◽  
The North ◽  
North And South ◽  
Upper Mesozoic

The valley of the Tochi River is an outlying corner of the British Empire in India forming a portion of Waziristan, the boundary of which was delineated in 1894–5 by an Anglo-Afghan Commission from the Afghan provinces of Khost on the north and Birmul on the west. Mr. F. H. Smith, of the Geological Survey of India, accompanied this Commission as geologist, and his observations “On the Geology of the Tochi Valley” were published in 1895 in the “Records of the Geological Survey of India” (vol. xxxviii, pt. 3, pp. 106–110, pl. iii). On p. 109 he says:—“The range of hills between Idak and Mirán Shah is formed by an anticlinal ridge which approximately strikes north and south, and which is composed of these lower eocene beds. In the core of the anticlinal a considerable thickness of massive dark grey limestone is exposed, in which I could find no fossil remains; the age of this limestone is therefore doubtful, and there is no evidence of any kind to show whether it belongs to the lowest tertiary or upper mesozoic age.”

On Tapiolite in the Pilbara goldfield, Western Australia

1917 ◽  
Vol 18 (84) ◽  
pp. 107-121 ◽  
Author(s):  
Edward S. Simpson
Keyword(s):  
Western Australia ◽  
Geological Survey ◽  
North West ◽  
The North ◽  
The World ◽  
The Tropics ◽  
Considerable Detail ◽  
Mineral Product

The Pilbara goldfield lies in the north-west division of Western Australia within the tropics, and has been described in considerable detail by A. Gibb Maitland in Bulletin 40 of the Geological Survey of Western Australia. Though the chief mineral product at present is gold, the district abounds in other economic minerals, notably ores of copper and tin, and has already become famous as being by far the most important producer of tantalum in the world, the chief source of supply of this metal being the manganotantalite of Wodgina.

Further Discoveries of Flint Implements in the Brown Boulder Clay of North-West Norfolk

1932 ◽  
Vol 6 (4) ◽  
pp. 306-315 ◽  
Author(s):  
J. Reid Moir
Keyword(s):  
Sea Level ◽  
Geological Survey ◽  
Prehistoric Archaeology ◽  
East Anglia ◽  
North West ◽  
Terminal Moraine ◽  
The North ◽  
Boulder Clay ◽  
Western Portion ◽  
North Western

Since my original paper on the flint implements found in the Brown Boulder Clay of north-west Norfolk, I have continued my researches in that region, and now wish to give some account of these, and of the further specimens which have been discovered in this most recent boulder clay of East Anglia. I would take this opportunity of thanking the Trustees of the Percy Sladen Fund for their kindness in supporting this research with a money grant, and so enabling me to continue my examination of an era of much interest and importance to prehistoric archæology. I am also very grateful to my friends, Mr. J. B. Calkin, Mr. Guy Maynard, and Mr. J. S. Fisher, for the valuable help they have given me in carrying out the investigation of the Brown Boulder Clay.As is now widely known, this deposit, so far as Norfolk is concerned, is confined to the north-western portion of that county, and many years ago was examined and reported upon by the Geological Survey in two of their memoırs. The Brown Boulder Clay occurs approximately at sea-level at Hunstanton, while at Brancaster, as reported by Mr. Clement Reid, the deposit is exposed at low water upon the foreshore, underlying the ‘submerged forest’ which he saw there. At other places, such as Holkham brickfield, and the remarkable formation (probably a terminal moraine) in Hunstanton Park, the boulder clay rests at about 50 ft, above O.D.

V.—The Fossil Flora of the Ingleton Coal-Field (Yorkshire)

1912 ◽  
Vol 9 (2) ◽  
pp. 80-82 ◽  
Author(s):  
E. A. Newell Arber
Keyword(s):  
Geological Survey ◽  
Fossil Flora ◽  
Coal Field ◽  
Upper Carboniferous ◽  
North West ◽  
The North ◽  
North Eastern ◽  
Coal Measures ◽  
Coal Fields

The Upper Carboniferous rocks of the Ingleton Coal-field in North-West Yorkshire present a difficult study, and at the present time they are very imperfectly known. As mapped by the Geological Survey, there is apparently a perfect succession, passing up from the Yoredales, through the Millstone Grits, to the Lower and Middle Coal-measures. The coal-measures are in part overlain hy a series of red rocks, which have been assigned to the Permian, as in the case of other of the Midland Coal-fields. In the index of the Survey map of the north-eastern portion of the coal-field, the Deep Coal is taken as the top of the Lower, and the bottom of the Middle Coal-measures.

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