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ADDITIONAL NOTES ON THE GEuLOGY AND PALAEON- 

 TOLOGY OF OTTAWA AND VICINITY. 



hY HENRY M. AMT, B.A., ASST. PALAEONTOLOGIST GEOL. S'JRV. OF CANADA. 



7iert(f J/^th March, ISSo. 



Evirther ciifjuiry into the varied anl interesting as well as exten- 

 sive series of strata exhibited in the Ottawa valley, both above and 

 below the city, has added not a little to the sum of 'our knowledge 

 already recorded in the transactions of this society and elsewhere. Both 

 in palaeontology and s'ratigrajjhy, tiiuch new to the locaUty, to Canada, 

 and in some instances to science, has been discovered. 



The field of research is vast and important, but fortunately a 

 decided increase in the interest taken in geological science has marked 

 the season just closed. No less than sixteen members of the geological 

 section took advantage of the sub excursions, a number of whom made 

 collections whilst others took only a partial yet a[)preciative interest in 

 the subject. 



The beautiful sequence of the lossiliferous sedimentary strata, 

 ranging from the Upper Potsdam to the Hudson River inclusive, is here 

 well defined and may be studied to great advantage not only from a 

 mere chronological standpoint but also in com[)arison with rocks con- 

 sidered to be synchronous with these, and deposited under rather dif- 

 ferent conditions in other portions of this continent. To trace out 

 accurately and ascei'tain the degree of submergence and elevation 

 which at different times are known to have occurred in this neighbour- 

 hood during the palteozoic period; and likewise to note the sequence of 

 life during this same period as evinced from the palceontological data 

 already o^jtained and still coming in, the changes in the flora and 

 fauna corresponding to the changes of water-level, are indeed tasks 

 worthy of a Murchison, of a Sedgwick, a Barrande, a Logan, or 

 a Billings. Without going into details as tp the result of a number of 

 sections which have been studied from exposures in this neighbourhood, 

 the general results obtained in the field during the past summer may be 

 summed up as follows, the notes on each formation being given 

 separately. 

 9 



