VOL. XV. (2) ROCKS COLLECTED IN CYPRUS 103 
iron-oxides (as magnesite, haematite, and limonite), while 
the silica is liberated as quartz. Some of these alterations 
may be seen in the specimens before us, notably the 
change to iron-oxide, some of the crystals of diallage 
having their centres converted into that substance. By 
these decompositions great changes have been produced 
in the earth’s crust, basic igneous rocks being transformed 
in mass into crystalline schist and iron-ores. Similar 
alterations have taken place in the ancient rocks of the 
Malvern Hills, as I described in outline to the Club 
in 1898." 
Some of the specimens show a laminated structure, 
serpentine and steatite being arranged in alternating layers. 
This effect would be ordinarily produced if the decom- 
position took place under pressure, the new minerals, as 
they were generated, being squeezed out into lamine. 
This structure led the old school of geologists to assign a 
sedimentary origin to many igneous rocks. It was per- 
haps this laminated or schistose appearance that suggested 
to Capt. A. R. Saville, in his Report on Cyprus, that the 
gabbro was produced from stratified deposits by a process 
of metamorphism. This, as I have attempted to show, is 
a misapprehension of what has actually occurred. 
The rocks of Cyprus have been recently described in a 
paper read before the Geological Society of London 
by Mr C. V. Bellamy, assisted by Mr A. J. Jukes-Browne.”* 
Mr Bellamy refers to the plutonic masses, and considers 
that they have been intruded into the sedimentary strata 
of the island in the interval between the Oligocene and 
the Pliocene periods. Assuming the accuracy of this 
observation, it is interesting to notice so many points 
of resemblance between rocks comparatively so. modern 
and the ancient crystallines of Malvern. 
1 Proc. Cotteswold Nat. F. C., Vol. xii., p. 239. 2 Proc. Geol. Soc., Session 1904 - 
1905, p. 29. 
