SEC. 5.] LODAEE AND JOORUN RANGE. 147 



north being probably the result of dislocation accompanying' a fracture 



occupied by a large trap dyke a few yards to the south. Crossing this 



dyke, a mass of shales and clays, varying from yellow to gray and black, 



and having a thickness of at least 300 feet, is met with. The only 



fossils they contain are a few small pecten-like finely striated bivalve 



. shells so imperfectly preserved that they could not be determined. 



These beds are intersected by one or two curious narrow 



dyke-like veins of blue pyritous sandstone or 

 Sandstone veins. . . .. 



quartzite which distinctly cut through the beds 



for several feet without dislocating them, though only an inch or two 



in thickness. Resting on these shales are the sandstones which form 



the summit and south side of Roha hill, and then a long succession of 



clayey, flaggy, and shaly beds overlaid by the red variegated yellow, 



purple, white, and ferruginous sandstones of the upper Jurassic o-roup. 



The section being as follows from near Joorun southwards up the 



river course : — 



Dip N. 45° to vertical. 



7. — Fine grained flaggy light coloured beds ... ..,^ 



6. — Coarse, weathered, friable white sandstone and shales, dip to I 



N. 80°, or vertical ... ... ... __ j 



Trap dyke, dark gray, slightly amygdaloidal, finely crystalline ... [ '''• 



5. — Muddy gypseous brown sandy clay ... ..^ 



4. — Rugged sandstone and soft raggy clay ... ... ... j 



3.— Sandstone and couglomeritic beds with silicious layers and red~\ 



jaspery fragments ■... ... ... ( c,^^ 



2. — Soft buff sandstone overlying purple obliquely laminated ditto... ) 

 1- — Very hard fine brownish purple thin-bedded sandstone and 

 purple quartzose conglomerate over soft rugged orange 

 earthy beds, with fossil wood ... ... ... 150 



Axis. ' 



Dip S. average 35° or 30°. 

 5 or 6.— Soft sandy clays containing numerous Beletnnites like B.'^ 

 Jiastatus ... ... ,,, ... j 



Dip S. 30°. I 



Fault and trap dyke here strike north of east slightly : trap gray and " 



solid 

 Red, greenish, black and gray shales, with few fossils ...J 



6.— Sandy and shaly beds with traces of Ammonites and plants seen 



west of section, thickness uncertain ... ... ? 100 



( 147 ) " 



