LAKES IN RELATION TO GEOLOGICAL FEATURES 497 
EuN^ NAN (Tay basin). — Small tarn on high plateau. A rock-basin in 
dark schist and limestone^ which may be partly due to solution. 
Eye.— Vok IL Part L p. 290. 
Fad. — Partly rock-basin and partly drift-dammed along the line of 
shatter-belt of Toward Point fault, bringing Upper Old Red Sand- 
stone into conjunction with Highland schistose rocks. 
Fada (Ewe basin). — Rock-basin in Lewisian Gneiss, Torridon Sandstone, 
and Cambrian strata. The upper end is crossed by the shatter-belt 
of the Fasagh fault, which also determines its outlet. 
Fada (Gruinard basin). — Rock-basin in Lewisian Gneiss. 
Fada (N. Uist). — Irregular rock-basin in Lewisian Gneiss. 
Fadagoa. — Irregular rock-basin in Lewisian Gneiss, along the strike of 
the rocks. 
Fannich.— Vol. II. Part I. p. 288. 
Faoileag, nam. — Irregular rock-basin in Lewisian Gneiss. 
Fender. — Partly in crystalline schists and partly drift-dammed. 
FiART. — Rock-basin in metamorphic limestone associated with black 
schist along crest of anticline, partly due to ice erosion and partly to 
solution. The black schist underlies the limestone and forms the 
retentive layer, the level of the lake determining the saturation of 
the limestone in the synclines (see Baile a' Ghobhainn, ante, p. 489)- 
FiNLAS. — Partly a rock-basin in Lower Silurian greywackes, and partly 
ponded by drift. 
FiODHAiG. — Rock-basin in granulitic schists. 
FioNN (Gruinard basin). — Rock-basin in Lewisian Gneiss, drained by the 
Little Gruinard river, which leaves the loch by a series of rapids 
and waterfalls. It is one of the few Scottish lakes which fork down- 
wards towards its outlet — a fact of great importance in relation to 
the theory of ice-erosion, as shown by Penck. 
FioNN (Kirkaig basin). — Vol. IL Part I. p. 188. 
FiTHiE. — Resting on Old Red Sandstone, and ponded by drift. 
FiTTY. — Partly artificial, and lying in drift. 
Fleet. — Resting partly on rock (granite) and partly in drift. 
Flugarth. — Partly drift-dammed and partly a rock-basin in schist. 
Forfar. — Kettle-hole ponded by drift. 
Freuchie. — Partly a rock-basin in schists and partly ponded by drift. 
Frisa. — Valley rock-basin in Tertiary volcanic plateau, Mull. The 
direction of the valley has evidently been determined by the lines 
of fissure followed by the great series of Tertiary basic and acid dykes. 
The valley is open at both ends, and thus received a larger volume of 
ice than would have fallen to its share had it been closed at the head. 
Fyntalloch. — Hollow in boulder clay resting on Silurian greywackes. 
It drains into Loch Ochiltree. 
Gabhar, nan. — Drift-dammed shallow loch at foot of Glen Gour. It 
must have been filled with ice when the raised beaches at Corran 
were being formed. 
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