No. 3.] SPENCER — PALEOZOIC GEOLOGY. 137 



Section IV. (along Rosseaux Creek). 



This section along Rosseaux Creek, extends from Albion Falls (in 



Barton Township) to Carpenter's Limekilns, on the Hamilton 



and Caledonia road. This line follows nearly the strike of the 



formation. The section is in descending order. The numbering 



of the beds refers to the corresponding strata at Hamilton and 



Dundas. 



Only the Niagara Formation is represented. 

 Beds. Thickness. 



No. Feet. 



Dark gray bituminous dolomites at Carpenter's Lime- 

 kiln, R. VI, lot 15, Barton. The top bed is two feet 

 thick, with glaciated surface. This bed contains 

 abundance of Stromatopora 11.5 



Beds concealed 42 . 7 



Grey bituminous dolomites (Range VII, lot 7, Barton) 

 beds 0.25-1.0 foot thick, containing cavities filled 

 with barite, calcite, selenite, fluorite, galenite, spha- 

 lerite, and other minerals in beautiful crystals, 

 besides bituminuous matter - ... 15.1 



Covered beds 5.7 



Earthy compact dolomite (Range VII, lot 5) 6,2 



(The following is down the creek, R. VII, lots 4-1.) 



Fine grained dark dolomite, in one bed, with glaciated 



surface 2.2 



Areno-argillaceous dolomites, in thin beds with shaly 

 partings, 0.2-0.4 foot thick 12.3 



Dark brown flags, areno-argillaceous, with films of 

 dolomite 1.3 



Shaly dolomite (with abundance of StrepteLasma) ... 2.5 



Blue arenaceous shales, hardened with crystalline 

 particles of dolomite 2.9 



Argillaceous dolomites 3.2 



Blue and red shaly rock 3.0 



Dolomitic flags ( Avicula bed), dark brown arenaceous 5 . 4 



Covered beds 3.0 



Earthy dolomites, forming bed of creek 7.5 



Covered beds 3.7 



Thin gray dolomites (areno-argillaceous), forming 

 brow of escarpment, just west of Falls 4.0 



132.2 



11 12 



. ' Cherty dolomites, at Albion Falls 18.4 



10 Argillaceous dolomites, in thin beds, with shaly part- 

 ings 22.6 



9 Blue hard dolomitic shales, with beds of shaly do- 

 lomites 12.0 



8 Gray crystalline dolomite, in one bed 4.9 



7 Argillo-arenaceous dolomites, in thin beds 7.7 



65.6 



Total thickness of Niagara beds 197.8 



Vol. X. I 2 No. 3. 



