NO. I FORMATIONS OF BEAVERFOOT-BRISCO-STANFORD RANGE 



GENERALIZED SECTION OF SHEPARD 



Feet Meters 



Silurian or Devonian. 



Riclimond, Upper 



Cambrian (Upper), 



Mississippian ] Massive limestone i,ooo+ 304-8 



rThin-bedded limestone and shale. . . 500 -|- 152.4 



Devonian (Upper) . . .^ Quartzite 500+ 152.4 



[Massive limestone 2,500+ 762. 



Calcereous shales 900 + 274.3 



Massive crystalline limestone 600 182.8 



Boulder bed 300 " 91-4 



Massive gray limestone 650 198.1 



/Massive gray and black limestone. . 2,200 670.5 



■ t Sandstone and quartzite 400 121.9 



Richmond, Lower j Massive limestone 950 289.5 



Ordovician (Lowest) . j Thin-bedded limestones and shales. 1,600+ 487-6 



Shales and thin-bedded limestone. . 1,000+ 304.8 



Massive pink weathered limestone. . 1,000+ 304.8 



Cambrian (Upper f Thin-bedded Hmestone 1,500 457-2 



or Middle). tMassive gray and black limestone.. 500 152.4 

 Cambrian and Pre- /Conglomerates, sandstones, shales 



Cambrian. 1 and schists 5-000 + 1,524. 



This section locates the " Siluriah or Devonian," and beneath them 

 the Upper and Lower Richmond, Lowest Ordovician, and Upper 

 Cambrian.^ 



The formations inckided in this paper may be compared to those 

 of the Shepard section as follows : 



SHEPARD SECTION 



Brisco = Upper Richmond, also boulder bed of "Silurian or Devonian." 

 Beaverfoot = Lower Richmond, also massive pink weathering limestone of 



Upper Cambrian. 

 Wonah Quartzite = Base of Upper Richmond. 

 Sinclair = ^ 

 Mons = Ordovician (Lowest), also shales and thin-bedded limestone of Upper 



Cambrian. 

 Lyell = Massive gray limestone of Silurian or Devonian. 



Much in the Shepard section is necessarily theoretical, as he did 

 not attempt to work out any one section thoroughly. He made a 

 broad reconnaissance and added materially to the information in 



*Jour. Geol., Vol. XXX, 1922, p. 364. 



^ Shepard apparently did not meet with the shales and sandstones of the Ordo- 

 vician Sinclair formation carrying graptolites of the Beekmantown fauna. The 

 formation is finely exposed in a number of places in the Stanford Range. 



