Palaeozoic Geolor/y of Victoria. 



109- 



Five separate areas have been observed within the region here 

 discussed, wliere rocks regarded as Ordovician have been observed. 



Three of these are quite small inliers, two occurring in the bed. 

 of Boggy Creek (Sees. C. and E.), and the third in Ironstone Creek 

 (Sec. D.) The relationship to the " Snowy River Porphyry Series "' 

 can be studied at all these sections, but its best seen at Section E, 

 Nowa Nowa railway bridge. (See Maps 4 and 5, and Section E.) 



Though the strike and dip of the two series are similar in direc- 

 tion, the junction is seen to be unconformable. 



No fossils have been obtained from any of these inliers, but the- 

 outcrops at both sections, E and D, appear to be on an extension 

 of the strike of a larger belt to the north, where graptolites have- 

 been obtained, and the" rocks are lithogically similar. All that can 

 be said, therefore, with regard to the age of the succeeding igneous, 

 series is that it is post Upper Ordovician. 



The two remaining occurrences are of larger extent, and their- 

 position will be seen by reference to Map 5. One occurs as a 

 narrow strip about a mile in width, and nine miles long, with a. 

 general bearing a few degrees east of north. It is almost sur- 

 rounded by the " Snowy River Porphyries." Its southern continu- 

 ation is maskedl by the Upper Kainozoic sands and gravels. 



These deposits also border it for alout two miles along the north- 

 western boundary. 



About two-thirds of the length of the belt coincides with the- 

 crest of the Tara IJanue, but at the northern end it lies a little* 

 to the west of the watershed. 



w 



LOWtR DEVONIAN 



,:^.7.7/f^V) MI.s-^j. 



^mmlln 



'^ b C d € 



SLCTioN A. Boggy Creek. 



a.Lifhr^reen chlonh'c shult. Jr. Purpk sUe wirh sericfhc markinos 



c. Porphjrj hrewa , d. CfiocoUe shdie simi/cirto h. 

 e. L'l^ht colourec/ ^hedred fe/si/e 



HorizoTifal Scale i° ," v"-" 



Verfical i ° . . .. ^'° v "" 



BocGY Creek Region 



