AUSTEN ON THE BOULONNAlsf "^^^ " 243 



Succession of Beds. Conditions Indicated. 



,, ri?.: Pure massive limestone ^ Deep open sea. rOfffi "^irfT 



A. < b. Napoleon marble zone t Zone of Terebratula elongata. /^ • 



Lc. Thick-bedded limestone ... t : .>.;i 



■' — -^ (Sequence broken.) ^'-^^is eili iv ' 



uosoBaodTr: 



fd. Micaceous sandstones : upper Clean drift sand.>q^ b Biitro't osIk i 



surface denuded. i ^ >i>! ■- ••Ajra ev£i{ 



B,-^ e. Alternations of shales and Sublittoral oscillations : "' fjf^^S 



j marine sandstones. ductus. - '"*"' 



If. Shales and coal-seams } Ferns; Calamites. Alternations 



J of terrestrial surfaces. 



>. Black limestone: chert- a«o:li?h«ma sdT 



seams j Brachiopoda; Tul-bindlise. 



h. White friable limestone ... ^ Productus giganteus zone. 



i. Calcareous sands f Lithostrotiq)p^ iis, jj;;,i;ijUiial aiiw I 



j. Thin-bedded limestones and rf rfifw -t'lrrr Tf-^lRrrffi'" 



shales f Productus, Spirifer. 



___ (Interrupted sequence of Haut- 



banc limestone.) 



c.<; 



D. k. Lower limestone of Haut- -"" smupiu 



banc, 170 feet thick j; Deep open sea. ' urijK. . 



2 J 



Z. Shales J Facies of marine fauna changes. 



E. -j m. Clean micaceous sandstones ^ CucuUsea, Cypricardiaj.:i i.; sj.. 

 ;. Red shales and clays f ti jStiOitasr. ; rl 



"o. Calcareous shales ^ Zone of Spirifer Verneuilii. 



p. Coral limestone of Fiennes ... Open sea coast-line distant. 



q. Shales. 



F. <( r. Dolomitic lime and sand ... t Drift beds. 



s. Shales t 



I t. Black compact limestone ... t 



[u. Shales J 



«' 'k Micaceous sandstones, coarse — Proximity of a terrestrial surface. 



w. Red and black shales f 



G. -l X. Black limestones f 



y. Shales ^ 



