Physiography of Bulla Area. 



34f> 



'^^Z- 2. — Photograph of the junction of the Uppei- and Lower Series 

 of Newer Basalt, near the Canyon, Bulla. The Lower 

 Series is resting on grit«, which show slight step-faulting. 

 The Upper Series is seen resting on the weathered surface 

 of the Lower Series. The junction of the two basalts is 

 indicated by xx on the photograph. 



t>, O T1 O Cb O .^ & r O f, < 



Retent Alluvium 



Kaihozoic ConQ,loniera.te Reduslributed on Spurs 



Gi-aiiod I'orite Detritus on Newer Bisa-lt 



Upper Series of Newer Ba-sa/lt 



Grits etc between Upper O/iid Lower Serial 

 ■ Lowev Series oF Newer Basa-lt 



Eucal^cptus Leaf 3ecis 



Pre- newer- ba.sa-1 tic l^iver Silt/ 



Strditifi&d Kaiinozoic Grits 



Older Bi.salt and fieosic Djlfes 

 Pre-older-bajsa-ltic KiverSilt a-nd CoM^tomeyeotei 

 Lower Situriin Pediments 



UppevOrdovicici/n 5edlment& 

 GraLnodiorite a-nd Acid I)yke^ (iDevonia/nY 



Rocks of the Bulla-S\(denViam Area Arranged m (J-onolo^ical Column. 



