Gudbx. — Succession of Tertiary Beds in Pareora District. 



255 



towards the dolerite. The highest exposure of the red sands occurs about 

 20 ft. below the dolerite, but, as at Sutherland's and Southburn Cutting, 

 the uppermost beds are devoid of fossils. The intermediate parts of the 

 red sands — namely, those with concretions and layers of shelly sand- 

 stones — are not well exposed on the left bank, but they appear on the other 

 side of the valley, in Holme Station. 



N.W. 



SE. 



Fig. 7. — Section across south-west corner of Mount Horrible. Distance, 

 about l£ miles; direction, N.W. - S.E. ; clip, 15°. 1. Limestone. 

 2. Blue clays. 3. Red sands. 4. Gravel. 5. Ash. 6. Dolerite. 

 7. Talus. 



From the blue clay I collected the molluscs tabulated in column 7 of the 

 table, and in addition Pachymagas parki (Hutt.), Flabellwm circulare T.-AV.. 

 F. laticostatum T.-W., Trochocyathus mantelli T.-W., and annelid-tubes. 

 From the upper red sands I obtained Ampullina suturalis (Hutt.), Hetm- 

 conus trailli (Hutt.), and Chione sp. 



Cave ami Sutherland's. 

 The beds exposed in these two localities are — the lower sands and 

 sandstones, the crab-beds and marls, the limestone, the blue clay, and 

 the upper red sands. The sequence is exactly the same as at Squire's. 

 Farm. Mount Horrible, and Cannington. The lower red sands are seen 

 in the right bank of the Tengawai, a quarter of a mile above the railway- 

 station. They contain only a few fossils, as they are the uppermost 

 horizon ; the lower horizons, with corals, have not yet been cut into by the 

 river. In one exposure these sands show current-bedding. 



N 



Fig. 8. — Section across Tengawai River, at Cave. Distance. \ mile ; 

 direction, N.-S. ; dip, 35°. 1. Greywacke. 2. Sands. 3. Crab- beds 

 (greensands) with concretions. 4. Marls. ' 5. Dark arenaceous lime- 

 stone. 6. Ordinary limestone. 7. Gravel-. 



The crab-beds and marls are well exposed on the left bank, above Cave. 

 They have their usual lithological character, but the concretions contain 

 molluscs, chiefly lamellibranchs, instead of crabs. On the left bank the 

 marls are seen to be overlain by a dark arenaceous limestone, which is 

 thicker than usual. From the surface of contact I collected Lima imitata 

 Sut. and various pectens. The limestone is also seen in the bed of the 

 river and in the right bank at the bridge. Just below the bridge I col- 

 lected a number of fossils from the limestone. Fine exposures are found 



