[Proc. Roy. Soc. Victoria, 32 (N".S.), Pt. If., 1920J. 



Art. XXL-^The Physiography and Geology of the Bulla- 

 Sydenham Area. 



ALBERT V. G. JAMES, B.A., M.Sc. 



[Head 11th December, 1920]. 

 (With Plates XXXII.-XXXIV.) 



Contents. 



1. Cartography. 



2. Physiography. 



3. Palaeozoic Rocks. 



(a) Ordovician .sediments. 



(b) Silurian sediments. 



(c) Metamorphic rocks. 



(d) Granodiorite. 



(e) Kaolinized granodiorite. 



4. Kainozoic Rocks. 



(a) Older-basalt. 



(b) Pre-older basaltic river valley. 

 • (c) Basic hypabyssal rooks. 



5. Kaiuozoic Sediments. 



(a) Normal Kainozoic grits. 



(b) Eucalyptus leaf beds. 



(c) Newer-basalt' — Lower Series. 



(d) Inter-newer-basaltic grits and conglomerates. 



(e) Newer-basalt — Upper Series. 



(f) Poist-newer-basaltic grits anjd conglomerates. 



6. Acknowledgments. 



7. References. 



Cartography. 



The area examined covers 20 square miles, and takes in the 

 eastern half of quarter-sheet 7 S.E., and the western portion of 

 quarter-sheet 2 S.W. There are neither dates nor compass points 

 on these sheets. 



The date of one edition of the quarter-sheet was probably 186.3, 

 but the dates of the other two editions could not be obtained. 

 Two different copies can be seen at the Melbourne Public Library, 

 and a third at the Geological Survey Department. One of the three 

 editions has the Silurian conglomerate south-west , of Hanging 

 Valley (Plate XXXII.) wrongly coloured as Kainozoic. 



The dips and strikes of the palaeozoic rocks on the quarter-sheet 

 are inaccurate. 



18 



