Sedimentary Rocks. 49 



and Mr. F. Chapman kindly examined the Melbourne National 

 Museum collection without finding any fossils from Ba 71. Sur- 

 face wash may have obscured the outcrop, but field evidence 

 leads us to doubt the occurrence of Bendigo beds at this particu- 

 lar locality. All outcrops we have examined north of the Bacchus 

 Marsh Road have yielded Upper Castlemaine or Darriwil species 

 and these occur plentifully 200 or 300 yards north of Ba 71 along 

 the line of strike. They alsg occur half a mile to the south. 



Outcrops, interesting on account of their field relations, their 

 accessibility, and the representative nature of their facies occur 

 along the railway line south and north of Macedon R.S. The 

 southerly locality, Lower Darriwil, yields almost the same species 

 as Ba 69 and 70, i.e., the typical Oncograptus fauna. Lasio- 

 graptus is also found. A continuation of these beds outcrops 

 in the Turritable Creek a short distance upstream from the cross- 

 ing of the Upper Macedon Road. The northerly locality — in a. 

 cutting north of the 45 mile post — is Middle Darriwil, and, in 

 addition to previously recorded forms, Cardiograptus morsus, 

 Harris and Keble, is also common. Localities along the railway 

 further north yielded few graptolites, and those found were in 

 all cases referable to the Darriwil series. Similar graptolites are 

 recorded from Allot. 1, Sect. Va, Newham, by Drs. Skeats and 

 Summers. 12 



North and west of Macedon, and near the Campaspe -west of 

 Woodend, there are several outcrops, all of which appear to be 

 of Upper Castlemaine or Darriwil. age. At Ba 74, west of Wood- 

 end, one of the commonest forms is a narrow Diplograptus, 

 found also at Guildford, in the Werribee Gorge, and recorded by 

 one of us 13 as Diplograptus }{ cf. angustifolius. Along Goodman's 

 Creek we obtained Upper Castlemaine graptolites from numer- 

 ous outcrops, some of which may be on the same band of slate. 

 From Cockatoo Gully we have recorded similar fossils, and, in 

 one case, Oncograptus ups'xlon, showing that the beds here ap- 

 proach the Darriwil series. As in the case of the D. bifidus 

 beds, our results here are in agreement withJDr. Hall's record. 14 



(b) Structure of Area. 



It 'has been demonstrated that all the Lower Ordovician series 

 except the Lancefieldian are represented in the Gisborne district.. 



12. 4, p. 41. 



13. 18, p. 70. 



14. 6, p. 203. 



