64 REPORT—1863. 
instances, but it is important to suggest to you that this is a class of phenomena 
especially calling for the observation of local workers, and one which, I venture to 
add, would relieve the monotony of mere business underground visits with an 
interest of a wider and a higher character. 
It is well known that the ironstone bands of the coal-measures are among 
the most prolific sources of the objects of these studies, and I must, in con- 
clusion, refer to the very interesting lists and parallels of fossils prepared by 
Mr. Salter for the two last numbers of the “Iron Ores of Great Britain,” in the 
‘Memoirs of the Geological Survey.’ The rich stores obtained by zealous col- 
lectors in South Wales, and those yielded by the productive strata of the Pot- 
teries coal-field, have been formed under his careful hands into a very valuable 
foundation, upon which I trust that we may soon see in course of erection a sys- 
tematic and comparative natural history of the British coal-fields. 
On the Metamorphic Origin of the Porphyritic Rocks of Charnwood Forest. 
By Professor D. T. Anstep, 2.8, 
The proposition of the author was that the so-called igneous rocks of the district 
were a series of metamorphosed sedimentary deposits, probably comparable with 
those of North Wales. The slates of Charnwood, with their contained rolled pebbles 
and faint traces of life-remains, are known to alternate with rocks having the 
appearance of syenite; but he regarded the whole as of sedimentary origin. 
On a Deposit of Sulphur in Corfu. By Professor D. T. Anstep, F.R.S. 
Among certain gypseous marls and extensive deposits of gypsum on the northern 
side of the transverse limestone-axis of the island of Corfu many thin seams of native 
sulphur, almost chemically pure, are known to occur. Of these one series, from } of 
an inch to 12 inch in thickness, was examined by the author; and he was informed 
of another lower series of thicker beds. The surface of the sulphur in some cases 
presented a somewhat stellate appearance not unlike that common in wayellite. In 
the village of Spagus, near the deposits, the houses and walls are built of the 
gypseous rock, with occasional sulphur bands. _ Springs of water, smelling strongly 
of sulphuretted hydrogen gas, exist in the neighbourhood, A large quantity of 
sulphur had been removed for local use. 
The sulphur has not been found on the south side of the principal mountain-axis of 
Corfu, though it recurs in some of the other Ionian Islands, especially in Cephalonia. 
All the islands are subject to frequent earthquake-disturbances, but these are by no 
means synchronous—the earthquakes that affect the different islands not being in any 
way identifiable. Thus, within the author’s experience, earthquakes had occurred on 
one day in Santa Maura and on the same day in Cephalonia at a very short distance, 
but by no means at or near the same hour. The author connected the sulphur 
phenomena with the volcanic operations going on at a moderate depth beneath 
the surface, 
On some Facts observed in Weardale. By C. Arrwoon, 
On the Pennine Fault in connexion with the Volcanic Rocks at the foot of 
Crossfell ; and with the Tyndale Fault, called “ The Ninety-fathom Dyke.” 
By W. Baryeriver, F.G.S. 
After a brief description of the great escarpment of the Mountain Limestone 
system, underlaid at the base by the Old Red Sandstone conglomerate, the effects 
of the fault are traced in the line of “ edge beds” from Ravenstonedale to Tindale 
Fell, which consist, in different places, of the Great Scar Limestone, the Old Red 
Sandstone, the Silurian Slates, the Coniston Grit and Limestone, and northwards 
from Hartside Fell of the higher beds of the Mountain Limestone system. 
The band of volcanic rocks, about two miles in its greatest width, 1400 feet in 
height from the base in Murton Pike (the highest of the Pikes), and about 20 miles 
in length, occurs between the New Red Sandstone of the Vale of Eden and the 
