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FELSPATIIIC PORPHYRIES, ETC., MERIONETHSHIRE, 195 



93. — Felspathic trap — Locality as above. Specimen Upper 

 similar to the last. Amygdaloidal substances, in part decom- 

 posed out of the cavities, which contain calc spar. 



, 94. — Felspathic trap. 

 nethshire. Map 74, S.W 



Mowddwy, Merio 



n No. 28 



also section above, No. 7. Compact greenish-grey fel- 

 spathic rock ; weathers white. Continuation of the same 

 set of rocks as 92 and 93. 



95. — Felspathic trap. 



Mer 



of turnpike between Dolgelly and Bala, near the eighth 

 milestone. Map 64, S.W., and horizontal section No. 37, 

 line 3 ; also section above, No. 7. Compact greenish fel- 

 spathic rock ; weathers brown. 



Aderyn rocks, Nos. 94, 95, and ! 

 the river Wnion. Section No. 7. 



Mowddwy and Careg 

 repeated by a fault at 



96. — Decomposing felspathic trap. 



Meri 



o 



nethshire, as above. Similar to No. 96, but bleached and 

 porphyritic, from interspersed yellow felspar crystals, partly 



decomposed. 

 97. — Felspathic trap. — Clogwyn-yr Eglwys, 7 miles 



3, Merionethshire. Map 



74, S.W. Dark bluish-grey porphyritic felspathic rock, 

 with interspersed white crystals of felspar from same set of 



traps as above. 



This is a good typical specimen of this set of rocks, when 



freshly fractured and undecomposed. 



98. — Fflspathic porphyry. — West of Llyn Arenig, 6 



Merionethsl 



Map 



Dark 



greenish felspathic rock, with interspersed crystals and con- 

 cretions. Felspar shows an irregular scoriaceous surface. 

 From a continuation of the same rocks as No. 97. 



99. — Felspathic trap. — Q 



of a mile south of 



Moel 



y-Menyn ; 6 miles west-south-west of Bala, Merio- 

 nethshire. Map 74, S.W. Compact dark bluish-grey fel- 

 spathic rock. Conchoidal fracture. Weathered white to 

 the depth of quarter of an inch on the exposed faces. 



G 2 



