78 



Seventh Limestone 



C. Edmonds — 



Thickness. 

 Evenly-bedded grey limestones with 

 diagonally-bedded sandstones near 

 base and summit ; chinastone- 

 limestone and pseudo-pisolite ; 

 chert nodules at one or two levels. 

 Doloroite-mudstones and caleite- 

 mudstones with black shales at 

 base ...... 



S.W. 

 ft. 



N.E. 

 ft. 



Basement Bed 



Millstone Grit 



First Limestone . 



Dark-grey shale, 

 glomeratic in 

 comminuted 

 throughout. 



sandy, and con- 

 parts, with small 

 quartz - pebbles 



60 160 



6 



Table II. — Pal.5:ontology. 



First Shale 



Second Limestone 



Orebank Sandstone 

 Third Limestone 



Third Shale 

 Fourth Limestone 



Fourth Shale . 

 Fifth Limestone 



Sandstone and Shale 



Sixth Limestone 



Thin Beds. 



Coarse grits and sandstones contain plant -impressions. 

 Black shales contain Goniatites in abundance, 

 Pterinopecten sp., Lingula sp., and many 

 gastropods. 



Productus giganteus Mart., P. latissimus J. Sow., 

 ScheUivienella crenistria (PhilL), Athyris plano- 

 sulcata (Phill.), and Orbiculoidea nitida Phill. are 

 the chief brachiopods. Corals abrmdant : 

 DibunophyUuni ■muirheadi Thom., Aulophyllum 

 fungites pachyendotheciwi Thom. em. S. Smith, 

 Koninckophyllum magnificum Thom.., Caninia cf. 

 sub-ibicina McCoy, and Lonsdaleia floriformis 

 (Mart.) mut. laticlavia S. Smith are chief forms. 



Plant-impressions and indeterminable casts of 

 lamellibranchs. 



Productus latissimus J. Sow. , P. semireticulatus Mart. , 

 Dihunophyllum sp., Zaplirentis cf. disjuncta Thom. 



Plant-impressions m many bands. 



Fauna sparse, Zaplirentis ennisJdlleni Edw. & H. 

 and Diphyphyllum lateseptatum McCoy are chief 

 corals. 



"No fossils. 



(For palaeontology of Fourth Limestone see 

 Table IV.) 



No fossils. 



Productus cf. maximus McCoy, P. semireticulatus 

 Mart., P. cora d'Orb. mut. Di, Chonetes 

 papilionacea (Phill.) are characteristic and 

 abundant brachiopods. Coral fauna contains a 

 maximum of Cyatliophyllum murchisoni Edw. & 

 H., Koninckophyllum sp., Carcinophyllum sp.,. 

 Dibunophylhim d Vaughan, with Lonsdaleia 

 duplicata (Mart.) mut. melmerbiensis S. Smith 

 highly characteristic. 



Sandstone contains worm-tracks, rain-prints, etc. 

 Black shale is crowded with Chonetes hardrensis 

 (Phill.), Leptaina analoga Phill., Productus 

 longispinus Dav., and many lamellibranchs. 



Productus maximus McCoy, Chonetes aff. papilionacea 

 (Phill.), Dibunophyllum 6 Vaughan (rare), 

 Carcinophyllum 6 Vaughan, I.ithostrotion inartini 

 Edw. & H. characteristic and abundant. 



Nodular bed i^robably algal. Spiriferina cf. laininosa. 

 McCoy abundant. Pugnax pugnus Mart, and 

 Seminnla ficoidea Vaughan. Fish teeth fairly 

 common. Calcite-mudstones contain Spirorbis- 



