62 Rev. E. Hill — Geological Visit to Brittany. 



taven, supposed to be of Pre-Cambrian age. The granite is not 

 perfectly homogeneous, but has some faint appearance of structure 

 or incipient foliation, and I noticed a seam that to me resembled a 

 line of crush. Scattered masses tend to weather into oval boulders. 

 North of the village, a short distance on the right bank, we saw 

 granite closely followed by a much contorted rock ; a gneiss or mica- 

 schist in contact with the granite. This gneiss is regarded as rather 

 later than that of Quimperle. 



Eeturning as far as Eiec, and then diverging south-east, we passed 

 rocks of varying nature, named as sometimes granitic gneiss, and 

 sometimes gneissic granite, till where a new road has been made 

 for a mile or two skirting the estuary of the Belon, a series of fine 

 sections ai'e furnished. Any geologist interested in the question of 

 mica-schist and gneiss oi'iginating out of igneous rocks should especi- 

 ally study the sections in a cutting which succeeds an embankment 

 made for the road. 



Thence we drove through Moelan and Clohars to the mouth of 

 the river Elle, from Quimperle, and descended to the sandy beach 

 at Port Clohars (gay with bathers, country people, the tourist is 

 unknown). Here the cliffs to the east afford fine exposure of a 

 succession of stratified rocks regarded as Pre-Cambrian in age. 

 Some are hornblende schists, fairly compact ; some are extremely 

 coarse-grained rock, that seemed to me an arkose of a coarse gneiss, 

 and are by no means highly indurated : there are also some quart- 

 zite beds, and some chlorite schists, besides an intrusion or two. 

 These beds recur in similar order, so that there are probably repeti- 

 tions by faults ; unfortimatelj'^ I had not time to study this most 

 interesting section, and had to be satisfied with viewing it in a simple 

 traverse. We rejoined the carriages at St. Julien, and returned to 

 Quimperle, obtaining good specimens of the Quimperle gneiss 

 (gneiss of Pontscorff), after passing under the railway, at the entrance 

 to the town. 



On Tuesday morning our procession of vehicles defiled from the 

 town to the north-east along the road to Le Paouet. Granite was 

 examined at Le Combout, but nothing remarkable was seen till 

 ■when, within two miles of Le Paouet, we left the carriages and passed 

 the very interesting church of St. Fiacre. Making our way east- 

 wards by footpaths we came out on another high road, near the mill 

 of Eochepierou, to view the (Cambrian) Phyllades of St. Lo, at or 

 near their junction with a granite (granulite) : the only sections are 

 small roadside outcrops. Thence we walked to Le Paouet, which 

 was made a lively scene by the occurrence of a fair that day. Be- 

 tween this place and Gourin ' granulite ' is passed at Pont du due, 

 and a rather fine-grained granite at Le Saint. Gourin is said to be 

 the critical point for deciding on the conformability or otherwise 

 between the conglomerates of Gourin and the phyllades of St. Lo ; 

 but the evidence is I believe only circumstantial. Grey schists are 

 well seen near a rivulet just before entering Gourin, and the con- 

 glomerates in a quarry about 1^ miles east of the town on the road 

 leading to Plouaray. We again saw the red conglomerate north- 



