Proceeding eastward from the city we find another interesting 

 exposure of this formation occufring at the bi-anching of the road lead- 

 ing to Beech wood cemetery, close to the swamp. Here a very inter- 

 esting section may be seen sliowing the contact of this formation with 

 the Utica, indicating the presence of a local fault or dislocation appar- 

 ently causing a downthrow on the west side of the fault of at least 200 

 feet. This fault is a remarkable one, and can be traced to a distance 

 of two miles on the Ontario side, traversing the country in an approxi- 

 mate north and south direction, crossing the swamp above i-eferred to, 

 and may be seen bringing the measures of the Trenton at a high angle to 

 the liorizjn on the east side of Mackay's Bay. The Black River forma- 

 tion here, as in other places about Ottawa, is characterised by beds of dark 

 blue and grey impure limestone affording good building stone, almost 

 throughout its whole measures. At this exposure the lower measures 

 of the formation are tilted at an aigle of 90^ where they come in con- 

 tact with the Ucica formation, then proceeding eastward the beds are 

 seen to dip at various angles to the east, the angle gradually d.^creasing 

 until the summit of the bluff and the cemetery are reached, where they 

 are practically horizontal, dipping but slightly to the east. 



Amongst the organic remains found here may be mentioned Telra- 

 dium Jibratum (Safford), I/elicotoiim jdanulata (Salter), PUurotomaria 

 lapici'la (Salter), besides lamfllibranchiata and bivalve ento'nostraca 

 in gi'eat numbers requiring further study. 



Trenton Formation. — In this tolerably well known and interesting 

 formation some points of interest are always sure to come uj), both as 

 regards its paheontological record and local stratigraphioal significance 

 At Ottawa and vicinity the Trenton, like its closely related formations, 

 is affected by a number of faults, an 1 it has been ])retty conclusively 

 ascertained from flexures in the strata, accompanied by faults, exhibit- 

 ing what is generally termed a monoclinal structure, or simply a, 

 " monocline "-T-that there has been in most instances a downthrow on 

 the west side of the faults, which have a generil north and south 

 bearing at right angles to the course of the Ottawa River. The Tren- 

 ton formation, as exposed at Nepean Point and old " Barrack," or 

 now "Parliament Hill," ))i'e3ents many interesting faults and 

 flexures. 



