CHAP. 7.] ROCK FORMATIONS. — SUB-NUMMULITIC. 71 



very perfect easts of shells^ among wliicli univalves are most numerous. 

 At a short distance above the typical rocks of the series the marine 

 tertiary fossils begin to appear, and some strong- beds of laterite still 

 occurring in that formation seem to link this portion to the lower group. 

 The following sections taken from field notes will help to convey 

 a general idea of the sub-tertiary beds — ■ 



Section neae Wag-ka-Puddite. 

 J^atural order. 

 6. — Ferruginous bed with concretionary lumj^s of iron ore. 



6. — Blue and brown shales, thinly laminated gypseous above with rusty layers 

 and yellow ochreous concretions and vegetable markings. Lower part 

 darker and bituminous, with leaf impressions, &c. 

 4. — Blue-gray unctuous bed without lamination ; where damp, plastic ; and where 



- dry, the surface disintegrates to powdery incrustations. 

 3. — Faintly colored and white smooth magnesian (?) soft rock very irregularly 

 deposited, without lamination. Colors of the most delicate tints pale 

 gTeenish white, creamy white, pink, &c. 

 2. — More strongly and richly colored white, steatitio (.P) rock, red, purple, lavender 



and mottled, traversed by tangled ferruginous strings. 

 1. — Soft white aluminous bed with a sooty black hsematitic mineral largely segre- 

 gated in it. 

 X. — Gray augitic trap weathering with a glistening greenish crystalline surface. 

 „ Stratified traps. 



Section neae Mhuee. 

 Natural order. 

 6. — Yellow clays and shales — Tertiary. 

 5. — White unctuous clays alternating with beds of laterite. 

 4. — Shaly layers and red and white clays, some thin bedded. 

 3.— A thick irregular stratum of red and white earthy soft unctuous breccia, 



with large ' spauly' spheroids, the centres of which are of crystalline trap. 

 2. — Iron stained concretionary orystaUine trap. 

 1. — Dark gray traps. 



Section neae Eutteia. 

 Natural order. 

 5. — Brown and purple laterite earthy with glazed surfaces. 



4. — Pale pui-ple mottled, and white thick unctuous earthy rook with lenticular and 

 in-egular intersti-atifications of coarse gravelly quartzose sandstone and shale. 



( 71 ) 



