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21/02/2009 13:39:14
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P number: P221047
Old photograph number: D05417
Caption: Beinn Bheula Schist Formation, Firkin Point, Loch Lomond, Dumbartonshire.
Description: Inverted beds of the Beinn Bheula Schist Formation. The inverted rocks are gritty wackes, micaceous psammites, semipelites and more quartzose arenites. The Beinn Bheula Schist Formation is part of the Southern Highland Group of the Dalradian. A prominent finely-spaced S1 - S2 near 'bedding' parallel cleavage is seen in the psammites. The rocks are open folded (F4) and also contain a weak sub-vertical S4 cleavage. Late quartz veins cross-cut all structures. Note the sharp contrast of the gritty wacke unit and the semipelite. In individual areas of study of the Dalradian separate identifiable episodes of deformation have been termed D1, D2, D3 etc. in order of decreasing age. D1 is the onset of deformation, D2 the peak deformation and metamorphism, D3 waning deformation and metamorphism, D4 late deformation. The Southern Highland Group is the topmost group of the Dalradian succession. It is composed of a c. 4 km. pile of coarse-grained turbiditic sedimentary and volcaniclastic rocks deposited in a rapidly deepening basin.
Date taken: 01/05/1995
Photographer: MacTaggart, F.I.
Copyright statement: NERC
X longitude/easting: 233900
Y latitude/northing: 700800
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 395.08 KB; 1000 x 722 pixels; 85 x 61 mm (print at 300 DPI); 265 x 191 mm (screen at 96 DPI);
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