118 



G. EdTYionds- 



beds. Beside this general lagoon-phase of the Seventh Limestone 

 there are other deposits in the series, which tell of still greater 

 restriction of the sea, or even of its temporary exclusion ; these 

 occur between the Seventh and Sixth Limestones, between the 

 Sixth and Fifth, between the Fifth and the Fourth, in the middle of 

 the Fourth, between the Third and Second, and between the Second 

 and First. The following are details of (1) the succession at the 

 base, (2) between the Seventh and Sixth Limestones, and (3) at 

 the top of the Sixth Limestone. 



Shallow Water Phase at the Base of the Seventh Limestone, 

 YEATHOtrsE Station, Frizington. 

 Limestone with a standard marine fauna, rests upon :— 



Thickness. ft. in, 

 16. Calcareous mudstone ^ with ostracods and small gasteropods 



Nematophyllum minus McCoy appears 

 15. Black shale . . . ' . . . . . . 



14. Calcareous mudstone with ostracods and small gasteropods 

 13. Calcareous shale with sandy layers .... 



12. Calcareous mudstone with ostracods and fish-teeth fragments 

 11. Black shale or mudstone ...... 



10. Calcite-mudstone with conchoidal fracture 

 9. Dark dolomitic shale or mudstone .... 



8. Dolomite-mudstone, hematite-stained, with Bellerophon sp. and 

 large gasteropods ..... 



7. Sandstones and shale (with dolomitic bands) 



8. Thin beds of dolomite-mudstone and calcite-miidstone with thin 



interlayers of shale {Spircrbis sp. and small easteropods) 

 5. Dolomitized limestone with casts of Productus and stray 



corallites of TAthostrotion martini Edw. & H 

 4. Dark shale or mudstone 

 ■3. Calcite-mudstone (chinastone-limestone) with Spirorbis-\\ke 



annelids and small gasteropods ..... 1 6 



2. Black shales and thin dolomite-mudstones, 1 to 9 inches thick, 



with pyritic nodules, in hollows in the bed below . . 2 



1. Basement conglomerate of small crushed quartz-pebbles ; 



rests unconformably upon Skiddaw Slates . . .20 



Shallow Water Phase at the Top of the Seventh Limestone, 

 ToDHOLES Opencast, Cleator. 



Thickness. ft. in. 

 Blue-grey limestone with Spiriferina cf. laminosa McCoy (Puncto 



spirifer) in abundance, with Pugnax pugnus (Mart.), and 



Seminula cf . ficoidea Vaughan 



Black Shale _ . 



Calcite-mudstone weathering white and " flaking " Ion: 



with Spirorbis sp. ..... 



Black calcareous shale ..... 



Dark blue-grej'- limestone ..... 



Black shale finely laminated .... 



Dark blue-grey limestone {Psephodus magnus McCoy) 

 Black limestone ...... 



gitud 



nallv 





 1 



6 



3 



2^ 



7 



1 The calcareous mudstones (12, 14, and 16) are differentiated from the 

 " calcite-mudstones " of E. E. L. Dixon in that they do not weather white and 

 have no conchoidal fracture ; thej' have a peculiar texture that can only be 

 described as wood-like. The beds marked " calcite-mudstones " are like those 

 described in the " Cower Paper ", pp. 516-17. 



