58 



Para — Section 1026, Hundred of Para Wirra, to Section 3064, 

 Hundred of Barossa, a distance of four and a half miles. 



Though clay-slate is frequently seen at the surface over the 

 south-western portion of Barossa, yet it is only from a few of 

 the outcrops that accurate bearings are obtainable. In Allot- 

 ment 330, dip 40°, and easterly strike 15° to w^est of mag. 

 north. The clay- slate here has been used for building pur- 

 poses, is of the usual argillaceous character, and of medium 

 hardness. In the bed of Spring GruUy — Section 5, Hundred 

 of Barossa — a fairly-readable section of the beds is exposed. 

 The dip is 35°, and easterly strike 10° east of north. In 

 Section 3034 the clay-slate is exposed in a vertical position. 

 On the north-western side, in Section 7, Hundred of Nuriootpa, 

 dip 45° easterly, strata somewhat talcose, and much crumpled 

 transversely to the line of strike ; also associated w4th siliceous 

 infiltrations. Section 3044 (Whitlaw Gully), dip 30° easterly, 

 beds presenting the ordinary appearance. 



Quartzites. — In Barossa, as w^ell as in Munno Para, as shown 

 in my geological sketch of that Hundred (Transactions of 

 the Eoyal Society of South Australia, vol. iii., page 106), do 

 the more massive intercalations of quartzite determine to a 

 large extent the surface configuration of the area in which they 

 occur. 



The gentle and undulating surface of Western Barossa con- 

 trasts with the rugged grandeur constituting the almost inac- 

 cessible slopes and peaks of north-western Munno Para. Of 

 the many quartzite bands so extensively developed in the latter 

 area only one or two at the most extend into "Western 

 Barossa, and that only for a distance of three-quarters of a 

 mile. But the quartzite bands that do occur in "Western. 

 Barossa are the northern extension of the quartzites of 

 "Western Para Wirra that are shown in the horizontal section 

 accompanying the " Geology of Munno Para" (Transactions 

 Eoyal Society of South Australia, vol. iii., plate 6, figure 2.) 



Though probably diminishing slightly in thickness as they 

 extend through Barossa, yet their stratigraphical characteris- 

 tics, especially those of the lower or western band, become 

 very interesting. 



On the south bank of the South Para Eiver, in Section 1702, 

 Hundred of Para Wirra, the first tangible sign of disturbauce 

 or folding of the strata is displayed ; and on the northern side 

 of the gorge, about 200 feet above the bed of the stream, on 

 the western boundary of Section 110, Hundred of Barossa, the 

 practised eye can discover that the strata have been subjected 

 to a powerful pressure acting transversely to the strike. In 

 Section 1702, Hundred of Para AVirra, the synclinal and anti- 

 clinal folding of the strata, as shown in the cross section 



