TRANsiACTIONS OF SECTION C. 



717 



indicates the presence of pyroxeulte ; but the latter is often found without the 

 I'urnior. 



Tlie apatite cxtract»'d from these deposits varies greatly in quantity; some- 

 vieldinjr a few hundred ]K)uud.s, other.-* a few tuns, and so up to over 7,000 tons 

 irora tlie larf^est worK-eil deposit, which is still beinfr worked. 



It lias Ix't'U met witli in pyroxenite havini;^ a schistose structure in masses ol' 

 from a few pounds to a few tons between tlie irn-ffular layers. 



Ileposits of apatite have been met with whicli, on the surface soil beinff 

 ri'iuovedjsliowed a length of, say, ten times the width; where the widtii is, sav, 

 I'dur iVt't the len<rth would be, say, forty feet, narrowing towards tlie ends. On 

 bein;,'' worlicd it frencrally happened that both the width and the length gradually 

 (locru^•^ed until the deposit ran out or left only a narrow streak of apatite; giving 

 one the iinjircssion tliat the di'posit was tlie segment of an irregular circular form, 

 of whicli llie greater part had been cut oil". Tlie strike is generally that of the 

 iifiL'hbourliood, and tlie mineral usually separated cleanly from one wall, bui 

 R'Moin fiom both. One might fancy such a deposit had been .squeezed into a bed- 

 like form. 



Alining has extended to a depth of 1;!() feet, but by far t lie greater qur.ntity 

 has been taken from surface workings— workings ojien to daylight. 



7, On the Ornirrcnce of the Nunverj'ian * ApaiitJiriur/pr* in Canada, vith it 

 fi'W notes on tlif mirrtisriipir chdvactrrs of some Laurcntian Amphiholilef. 

 'r>if FiaxK D. Adams, M.AihSc 



Tlie author first gave a short account of tlie investigations whicli have l)een 

 made on this aniphibol(>-scapolite rock in Norway, where all the principal deposits 

 of apatite either traverse it or occur in its immediate vicinity. Tlie deposits of 

 apatite in Canada generally occur associated with some variety of highly pyroxenic 

 rick, often holding orthoclase and qnartz. 



The ' Apatitbringer ' has, however, recently been found in the vicinity of the 

 town (if Arnprior on the River Ottawa. It closely resembles the Norwegian rock, 

 Ixitli in external appearance and in its microscopic characters, containing horn- 

 Uende, scapolite, and pyroxene as essential constituents. A number of amphibo- 

 litt's ill the museum of the (reological Survey of Canada, which resemble this rock 

 in appearance, have been sliced and examiiiv'd with the microscope, and one of them 

 found to contain scapolite in larg(! amount. It was collected at Mazinaw Lake, in 

 till' township of Abinger, and is from the samt? belt of hornblendic rocks as that in 

 which Arnprior is situated. The paper closed with a short account of some cf 

 these amphibolites. 



8. On the Acadian Basin hi American Geology. 

 By L. W. Bailey, M.A., F.Ii.S.G. 



The Acadian Basin, embracing the region bordering on and including the Gulf 

 of iSt. Lawrence, togetler with the provinces of New Brunswick, Nova Scotia, 

 Newfoundland, and Prince I'Mward L«land, constitutes one of the natural physical 

 divisions of the continent of North America, and exhibits many marked peculiari- 

 ties of climate and floral and fiiuiial distribution. In its geological structure, and 

 in the history which this reveals, its individuality is not less clearly marked, 

 being often in strong contrast with that of other portions of the continent larther 

 west; and in some periods and features even exhibiting a closer relationship with 

 the geology of Europe. In the present paper, the facts bearing upon this in- 

 dividuality are summarised and discussed; including the consideration of tho 

 varying land-surfaces of Acadia in dillerent eras, the time and nature of its jihysical 

 movements, its climati' and its life. A review of recent progress in the invest igatioa 

 of its geological structure is also given. 



