J. E. Marr — Loicer Palceozoic Rocks of Settle. 37 



the Crummack Yalley. They consist of laminated blue, slightly 

 gritty flags, with 



Monograpliis priodon, Bronn. 



M. persoiiatus, TuUbg. ? 



M. cultellus, Tornq. 



Hetiolites Geinitziatius, Barr. 



Orthoceras. 



D. Grits. — These beds, the Grits A c 2 of Prof. Hughes' section, are 

 largely developed in both valleys. They have as yet furnished no 

 fossils.^ 



E. Upper Coniston Flags. — Seen at Studrigg, on the east side of tlie 

 Crummack Valley, and in Dryrigg, Arco Wood, and Combs Quarries in 

 Eibblesdale. They resemble, in lithological characters, the Lower 

 Coniston Flags, but the fossils are different. 



At Studrigg Monograptus Roemeri, Barr., was found by one of Prof. 

 Haghes' party, and the Ribblesdale quarries have yielded: — 

 Monograptus colonus, Barr. 



,, bohemicus, Barr. 



Favosites Jlbrosus, Goldi. 



,, alveolar is, Goldf. 

 Actinocriniis pulcher, Salt. 

 Fentamerus ? 



Orthoceras primmvum, Forbes. 

 Trochoceras giganteum, Sow. 



F. Grits. — Mentioned by Prof. Hughes as occurring above the 

 Flags (E) at Studfold Low Pasture, on the east side of Eibblesdale. 

 These are the highest Lower Palseozoic beds seen in this area. 



Comparison with other Areas. — The general resemblance between the 

 beds of this district and those of the Lake District, whether we take 

 into account lithological or palseontological characters, is so striking, 

 that there is little or no difficulty in correlating the beds of the two 

 areas. The following table shows the probable equivalents : — 



Lake District. 

 Coniston Limestone.^ 

 Ashgill shales. 

 Coniston Mudstones. 

 Pale slates. 



Brathay Flags. 



mmIiU^"^^"^^^^^^- 



Upper Coldwell beds. 

 Coniston Grits. 



Settle District. 

 Coniston Limestone Series. 

 Absent? 3 

 Absent ? 

 Conglomerate ? 

 Phacops elegans zone ? 

 Lower Coniston Flags. 

 Grits. 



Moughton Whetstones ? 

 Upper Coniston Flags. 

 Grits (Studfold). 



The most interesting feature of the rocks of the Settle District is the 

 approach to the characters of the Scandinavian beds. 



The Coniston Limestone series is much more shaly than the typical 



^ It is possible that the remarkable whetstones near the head of the valley, which 

 have not been detected in situ, are interstratified with the grits. Amongst the fossils 

 contained therein are : — 



Monograptus dubius, Suess. 



M. Nilssoni, Barr. 



M. uncinatus, Tullb. ? 



Orthoceras primmvum, Forbes. 



2 The beds with Bicellograptus anceps have not been detected in the Lake District 

 proper, but similar beds occur at Melmerby Scar, on the west slope of the Pennines. 



3 Unless the beds with Orthis testudinaria, immediately below the conglomerate, 

 are the equivalents of the Ashgill shales. 



