214 



Yorkshire Natiiralists at Askrigg. 



of the Crav^en Fault would assist in solving the first step in the 

 problem we have been discussing-. We should then karn some- 

 thingf of the way the old Silurian floor was collapsing under the 

 sediments that were being- laid down on the bottom of the 

 Carboniferous ocean. Then we should be able to face the task 

 of tracing- the later movements, to discover when the inception 

 of the Market Weighton axis took place and how it progressed, 

 to describe how the Pennine Range was left standing as a mighty 

 barrier between the east and west, while the newer seas ebbed 

 and flowed and left the records of their teeming life. Perhaps, 

 then, we may learn why it is that the present limits of the coal- 

 fields are foreshadowed in the thinning of the coal measures 

 themselves towards those limits, as if the Carboniferous sea was 

 shaping the present form of the coal basin. 



This was the problem that suggested itself to the writer as 

 the familiar paths rendered famous by the father of Yorkshire 

 geology were gone over. It is a big one — much labour must 

 be expended before much progress can be made — hut every step 

 will make the rest easier, and it would be but fitting that in 

 Yorkshire should be worked out the history of the rocks — to 

 trace the margins of those ancient seas and the building of the 

 hills. For that after all is the Real Geology. 



APPENDIX 11. 

 BOTANICAL SURVEY AROUND ASKRIGG. 



Dr. W. G, smith, 

 Leeds. 



Askrigg proved to be a good centre for botanical survey, 

 but three days were only sufficient to show what a large district 

 has to be worked from that centre, and how interesting it is. 

 In spite of the remote situation of Askrigg, there was a satis- 

 factory muster of the Botanical Survey Committee. The routes 

 taken were those on the circular for each day, but an attempt 

 was made to ascertain the features necessary for a botanical 

 survey by selecting routes more suitable for this purpose. Thus, 

 on Saturday not only w^as Whitfield Gill explored by the main 

 party, but the moors on the N.E. side were also visited and 

 recorded ; while on Monday a longer and more upland route 

 was followed to supplement the observations of the main party 

 to Semmerwater and Parker Gill. The chief features of the 

 vegetation can only be briefly noted till further survey is carried 



Naturalist, 



