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By R. G. Park
This memoir provides a descriptive account and 1:20,000 colored map of 1 of the main severe and engaging components of the Lewisian advanced of NW Scotland - a indifferent fragment of a supercontinent made of Laurentia, Siberia and Baltica, which existed on the finish of the early Proterozoic interval. The Gairloch region, including neighbouring Loch Maree, is the single a part of the mainland Lewisian outcrop the place Palaeoproterozoic supacrustal rocks (the Loch Maree workforce) and their relationships to the Archaean basement should be studied, and has been the topic of a large amount of study, spanning a interval of greater than 40 years. The Loch Maree workforce represents an amalgamation of oceanic, trench, and arc assemblages with continental basement, and types a part of a Palaeoproterozoic collisional orogen stretching from Labrador via South Greenland to Scandinavia. additionally on hand: The Geology of britain And Wales - ISBN 1862391998 The Geology of Scotland - ISBN 1862391262 The Geological Society of LondonFounded in 1807, the Geological Society of London is the oldest geological society on this planet, and one of many greatest publishers within the Earth sciences.The Society publishes quite a lot of fine quality peer-reviewed titles for teachers and execs operating within the geosciences, and enjoys an enviable foreign popularity for the standard of its work.The many components within which we submit in include:-Petroleum geology-Tectonics, structural geology and geodynamics-Stratigraphy, sedimentology and paleontology-Volcanology, magmatic reviews and geochemistry-Remote sensing-History of geology-Regional geology courses
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Example text
The amphibole sheaves are randomly oriented and the rock does not possess a marked foliation, although a crude compositional striping is usually present. The garnets are manganese-bearing spessartites (Tilley 1938: Al-Ameen 1979). 2 Geochemistry The BIF of the Gairloch district was the subject of detailed studies by Al-Ameen (1979) and Williams (1986). Al-Ameen carried out both whole-rock and mineral analyses on a representative set of 16 THE LOCH MAREE GROUP samples, including both silicate and oxide-facies rocks, for both major and trace elements.
Diopside also occurs in some outcrops. The meta-dolostone, which weathers to a distinctive yellow colour, occurs generally as narrower bands within the quartzchlorite schists of the Flowerdale marble belt. 1). 3. Chemical analyses of LMG meta-limestones and meta-dolostones from Gairloch; after Rock (1987). 02 28 12 9 13 25 23 4 4 305 5 21 1 3 1 102 9 62 22 3 13 16 7 10 37 14 1 6 456 3 28 1 1 1 155 18 127 44 4 6 5 3 4 8 14 5 16 11 4 6 13 15 1 3 145 2 5 1 1 1 2721 12 9 16 9 7 212 2 4 1 1 2 898 4 9 10 <1 17 Total iron small amounts of quartz, and bands rich in green chlorite, with minor phlogopite (Fig.
Immediately SW of the LMG outcrop, this concentration reaches its maximum expression, with over one-third, and in places almost half, the outcrop area being occupied by dykes. This belt of extreme dyke concentration is about 2 km wide; its margin to the NE is marked by a line extending SE from Shieldaig Lodge and to the SW by the track leading SE from Loch Braigh Horrisdale. g. Fig. 1). The dykes in this belt are typically deformed, particularly along their margins, and the whole belt has been affected by Laxfordian deformation.