RECENT GEOLOGICAL WORK AT THE LIZARD. 
119 
much whether there is any stratification, in the ordinary sense 
of the word, in the Lizard peninsula." 
Colonel McMahon, of London, published a paper on "The 
Lizard Gabbros" in the Geological Magazine for February, 1887, 
and he is still working on the subject. He suggested a modifica- 
tion of Mr. Teall's view as to the cause of the foliation in the 
gabbros, thinking it produced by " shearing motion " in the rock 
after its consolidation had advanced considerably, but was still 
incomplete, and not by " earth-movements acting upon the solid 
rock." 
A paper on the " Occurrence of Porphyritic Structure in the 
Lizard Rocks," by Mr. Alexander Somervail and the lecturer, was 
read before the British Association in 1887, and appeared in the 
Geological Magazine for February, 1888. They were led to the 
conclusion that many of the rocks hitherto known as schists were 
of igneous origin. 
The work of German geologists was appealed to by Mr. Teall 
in support of his views. Professor Bonney, whilst acknowledging 
that English geologists formerly underrated the effects of " squash," 
considered the tendency now was to attribute too much to that 
agency. 
Mr. Teall's latest confession of faith was as follows : "I 
believe the granulitic series of Professor Bonney is an igneous 
complex ; that the south-west portion of the Lizard is a zone of 
intense dynamic metamorphism, in which basic dykes have been 
transformed into actinolitic schists ; that gabbros and serpentines 
have been foliated by dynamic metamorphism in various parts of 
the district : but I am quite unable to frame any general theory 
which will satisfactorily account for all the phenomena. I regard 
the origin of the hornblende-schists as one of the most important 
unsolved problems." 
