EXCURSIONS. 
237 
On Saturday morning CastletoA\Ti was again the starting- 
point. Here some of the members inspected the Castle by the 
courtesy of the Governor, and were sho^Ti the collections which 
form the nucleus of the Manx National Museum. 
Others proceeded at once to Scarlet Point, where Friday's 
researches into the relation of the Volcanic Series to the Car- 
boniferous Limestone were resumed. 
Passing along Port St. Mary Bay in the direction of Pool- 
vash, the beds of ash and lava were seen to be strongly folded, 
and in some instances brecciated, blocks of the harder lavas being 
involved in the soft ashy beds. 
On nearing Poolvash the ash beds were found to be less 
and less contorted, and in some instances to contain fossils. 
These were evidently similar to those of the neighbouring 
limestones, and prove that these ashes were deposited in the 
form of mud in the Carboniferous Sea and that the volcano 
which produced these Scarlet beds was active during the Car- 
boniferous Period. 
On the cliff is a large quarry in Black Flaggy Limestone, the 
" Poolvash Marble." With regard to these beds there appears 
to be little difficulty, since they contain fossils characteristic of 
the Pendleside Series, and therefore rest on the top of the Car- 
boniferous Limestone. 
On the foreshore, however, the Flaggy Limestones are ex- 
posed in a number of folds, the surfaces of these somewhat 
resembling that of an over-turned boat. As one proceeds 
further along the coast these domes have their summits broken 
through and a White Limestone with abundance of fossils can 
be seen through the openings thus produced. On passing still 
further in the same direction the White Limestones are seen to 
form a number of knolls, from which the Black Flaggy Beds 
dip away in all directions. 
There was considerable difference of opinion as to the mode 
of origin of these knolls, and the discussion of them was left 
over until the evening. 
On the way from Poolvasli to Port St. Mary a fault was 
crossed, bringing in the Manx Slate Series. 
