Secrion IV., 1911. [121] TRANS. R. SNC: 
Upon Some Curious Structures in the Gypsum of Albert County, 
New Brunswick. 
Bye We Barcex,/ LED: 
(Read May 17, 1911). 
Those who are accustomed to the examination of folded rocks 
are aware of the singular and sometimes almost inexplicable features 
presented by the latter, but it is very rarely the case that one meets 
with structures exhibiting such remarkable conditions as are to be 
found in the specimens to which these remarks refer, and of which 
photographic reproductions accompany this paper. 
In the proceedings of the Royal Society for 1906-1907 a pretty 
full description of the gypsums of Albert county, New Brunswick, is 
given, together with a discussion of.their probable origin. The beds 
cover a large area and are of unknown thickness, the exposures in the 
quarries being at least 200 feet, and vary from a pure white alabaster 
to greyish and reddish varieties, with but little selenite, and with a 
considerable admixture, very irregularly disposed, of anhydrite. They 
lie at the summit of the Lower Carboniferous system, resting upon 
grey limestone and in places unconformably covered by coarse sand- 
stones of the Millstone Grit formation. As a whole they lie in the form 
of a shallow basin, and in many places show conspicuous bedding 
planes which are nearly or quite horizontal, but at many points local 
plications or deformations can be observed, and are sometimes of an 
abrupt character. 
The peculiar structures to which reference is now more particularly 
made are quite local and confined to a very small area, not more than 
a few yards in extent. The beds at this point are more strongly folded 
than is usually the case, but in addition to the larger corrugations, at 
once attract attention on account of the remarkable and beautiful 
erumplings exhibited by individual layers, crumplings so regular as to 
suggest comparison with artistic designs. Being also apparently inde- 
pendent of the larger plications they naturally suggest queries as to 
the probable cause of their formation and may have some bearing upon 
the conditions of origin of the gypsum deposits themselves. 
As will be seen in the illustrations, the stratification is indicated, 
quite markedly, by alternate bands of pure white and of gray, which. 
at times is rather dark. The exact cause of the latter is not easily made 
out, but it is apparently due to a small admixture of organic matter. 
The gray bands are also usually a little harder than the white bands 
as though partly composed of anhydrite. Taking the two together over 
