1906 | _ REPORT OF THE GEOLOGICAL BRANCH. 211 
nodules were seen. They vary in size from two feet in length to 
the size of a pea. Not one in fifty that may be picked up indis- 
criminutely appears to hold remains of organic origin worth col- 
lecting. These calcareous or lime concretions appear to be the 
result of the gathering of materials around some nucleus or centre 
which forms an initial point. 
CARP, ONTARIO. 
On the 1oth of June the O. F. N. C. visited Carp, Ont., and 
the Geological Section paid a flying visit to various openings for 
minerals in the vicinity of the village. On pages gr to 94 of THE 
Ottawa NatTuRALisT, Vol. XIX, No. 4, for 1905, an account is 
given of the principal finds made. Amongst these must be men- 
tioned the curved crystals of the mineral hornblende. Similar 
crystals have been noticed by Dr. Victor Goldschmidt, of the 
University of Heidelberg, in the Bulletin of the University of Wis- 
consin, No. 108, Science Series, Vol. 3, No. 2, p.p. 21-38, March 
1904, in which he describes the measurement of crystals by means 
of the two-circle goniometer. To the members of the Geological 
Branch such curved crystals were new and hitherto unrecorded. 
The distinct curves formed by the sides of the crystals appear to 
be continuous at times, and at others somewhat shattered. 
Whilst the inside curves are continuous the shattered and cracked 
or V-shaped openings on the outer curves appear to indicate that 
distinct breaks have taken place subsequent to and attending the 
curving process whatever that was. The nature of the force which 
caused the curvature has not been determined. Goldschmidt 
points out in the same piper that there are two sorts of curved 
surfaces of crystals, namely, that due to the growth of the crystal; 
and the second due to dissolution. The curved crystals indicated 
appear to be those of hornblende and are associated in the vein of 
mica and magnetite with crystalline Calcite, much of which has 
suffered dissolution or in other words has been dissolved leaving 
the hornblende crystals standing in relief in colonies. 
The deformation of the crystals from their normal erect form 
in the Carp specimens may be due either to force developed during 
crystallization cr since they were formed. In the light of the ex- 
periments in the flow of rocks by Dr. Frank D. Adams, of McGill 
University, Montreal, it is not improbable that these crystals 
