LOW-ANGLE FAULTING 
classic examples of the genus 
(Fig. 1). In the extreme north 
SE. 
of Sutherland the various rock 
groups overlying the Moine thrust 
plane can be shown to have been 
driven westward for a distance of 
ten miles.2. Horizontal shiftings of 
comparable magnitude occurred 
along the Ben More, Glencoul, and 
other planes of thrusting which le 
beneath the Moine thrust and add 
to the remarkable nature of the 
phenomena. ‘Though since thrown 7) 
into gentle folds, in many places it 
is clear that these planes of slippage 
were originally not far from the 
horizontal. In some other por- 
tions of the British Isles analogous 
phenomena have been observed. 
Similarly, in Scandinavia the 
very intense Caledonian deforma- 
tion manifested itself in horizontal 
overthrusting of astonishing magni- 
tude. The vertical displacement 
is slight, but the horizontal slip is 
measured in tens of kilometers. 
Allt’ Ealag 
AS 
Section from Elphin to Allt Ealag (about 6 miles in length). 
= 
EN 
Gj 
aa 
‘pp 
Tp 
z 
Cromalt 
Tz 
a ae 
CEA 
IN g 
TNS 
AE 
Md, 
2 
SS 
Pollan 
2 
< 
WS NG 
SRR WW 
T 
a 
Re) 
= 
=~ 
5 
QS 
S&S 
= 
6 
LAS 
s 
1G. 1.—The Scottish Highland type of overthrust. 
(T;) near Allt Ealag on the right is the Moine overthrust. 
the section is that of the Ben More thrust. 
Tk 
>— ——_ 
1B. N. Peach, John Horne, W. Gunn, 
C. T. Clough, and L. W. Hinxman, ‘‘The 
Geological Structure of the Northwest High- 
lands of Scotland,’ Mem. Geol. Surv. of 
Great Britain, 1907, pp. 463-504. 
2 John Horne, 7bid., p. 460. 
3A. E. Térnebohm, ‘‘Grunddragen af 
det Centrala Skandinaviens Bergbygegnad. 
Kongl,” Svenska Vet. Akad. Handl., Bd. 28, 
No. 5 (1896), pp. 190-95 and PI. IV; P. J. 
Holmquist, ‘‘ Bidrag till diskussionen om den 
skandinaviska fjaillkedjans tektonik,” Geol. 
Foren. Férhandl, XXUIL (1901), 55-71. 3 
Elphin 
The thrust plane 
From ‘Report on the Recent Work of the Geo- 
The gently folded thrust plane (72) which runs nearly the whole length of 
Two other major thrusts cut through the faulted slices near the left end of the section. 
4 
I 
logical Survey in the North-West Highlands of Scotland, Based on the Field-Notes and Maps of Messrs. B. N. Peach, J. Horne, 
W. Gunn, C. T. Clough, L. Hinxman and H. M. Cadell,” Quart. Jour. Geol. Soc., XLIV (1888), 426, Fig. 10. 
Note the relation of the overthrusts, or major faults, to the minor reverse faults. 
