Yd. 57.] 



OF THE NORTH COTTESWOLDS. 



153 



I 



Bates. 



Localities. 



Notes. 



'Pre-DumorttericB 

 hem era. 



'Pre-scissi hemera. 



In MurchismicB 

 hemera. 



Vre-discitcB hemera. 



Cotteswolds (Hares- 

 field Beacon and 

 northward.) 



Northamptonshire. 



Cotteswolds (Rand- 

 wick, Whittington, 

 Horsepools, etc.) 



Marked over the 

 Cotteswold.s,except 

 perhaps over sume 

 of the North 

 Cotteswolds. 

 D(jrset : Burton 

 Bradstock & Chid- 

 eock ; Somerset : 

 Br u ton. 



Possibly in Yorkshire, from 

 ibssil evidence. I do not 

 know the strata. 



Very marked :— strata of eight 

 hemerae having been re- 

 moved. Probably extends 

 irregularly to the North 

 Cotteswolds, but the erosion 

 is not so marked. 



Formation of pebbles, indicat- 

 ing penecontemporaneous 

 destruction. 



Erosion of the Upper Free- 

 stone marks this in many 

 parts of the Cotteswolds. 



Its extension over the Dorset- 

 Somerset district and in part 

 over the Cotteswolds has been 

 obliteral ed by the succeeding, 

 more marked erosion. 



The absence of fossils of the 

 h emerge concavi and discitcs 

 from much of the paliBon to- 

 logical literature of the 

 Continent probably indicates 

 a considerable erosion of 

 about this date on the 

 Continent of Europe. 



(b) Early Stepheoceratidan Epoch 

 (beginning of the Neojurassic Series). 



Vre-Garaniiancs 

 hemera. 



All over the Cottes- 

 wolds, Somerset, 

 and nearly all 

 Dorset, probably 

 over most of Eng- 

 land, and about the 

 same date over 

 Normandy. 



Oborne and Clatcombe near 

 Sherborne are the only 

 places that I know in 

 the South-west of England 

 which are unaifected. 



Such are the dates of a few penecontemporaneous erosions, and 

 their extension over part of England. It will probably be found 

 that they extended over many areas of the Continent. It may be 

 pointed out, however, that to follow such extension carefully a 

 system of minute zonal divisions is required, and that such a system 

 depends on a correct limitation of ammonite-species. 



