OEGANISMS IN ACADIA. 



139 



strike also occurs at this point. This might suggest a repetition of the measures by a 

 fault and overlap. But we do not find any evidence elsewhere to sustain such a view, 

 unless it be the thinness of the measures in other parts of the field. A difference in the 

 strike is also found at the base of the St. John group, where the two series meet at the 

 millpond, but here the dip of the two series coincides. 



Fig. 1. 



I re- Comb 



Hills 



M'JFFrcs House 



Sasal Series 



S Jonn Group 





Sketch Map and Section op Cambrian Rocks at Hanford Brook. 



Siale TOO ffti to an i.-ufi. 



The contact of these two series (the Basal series and the St. John group) is not visible 

 on this brook, being concealed under the low ground around the milldam of McAfee's 

 mill, but several miles west on EadclifF's millstream, a branch of Mispeck River, it is 

 apparent in the bed of that stream There the first layers of the grey sandstones at the 

 base of the St. John group are seen to be mingled with red sand derived from the beds of 

 the lower series. 



The grey sandstone («) at the base of the St. John group is a very persistent deposit, bein"- 

 found in all the basins of Cambrian rock near St. John. It appears to have been formed 

 not far from shore, but the actual shore line of this band has been preserved only at one 

 place on the " Straight Shore " in the upper part of the harbor of St. John, where a small 

 area of pebbly beach, the equivalent of this sandstone, has been let down by faulting amon"" 

 the other rocks oa the margin of the Laurentian area. The pebbles in this conglomerate 

 are small and are mostly composed of fragments of quartz and greenish slates, with a few 

 pebbles of Laurentian limestone. Ledges of Laurentian limestone are found on both 

 sides of this little patch of conglomerate, and the locality is au interesting one, as showino- 

 the irregular contour of the seabottom in this region in early Cambrian time. 



The Basal series of Cambrian rocks is well exposed in the valley of the Lous' Reach, 

 in King's county, though here the rocks are more disturbed than at Hanford Brook, and 

 the thickness and succession of the measures is not so clear, but judging from the dip and 

 the areas exposed, the former must be considerable. 



Caton's Island, a small island of the St. John River in this valley, gives the clearest 



