508 ME. E. WETHERED ON THE INFERIOR 



The following table gives the percentages of residue in the Upper 



Freestone : — 



Percentage of Average size 

 Insoluble of Quartz- 



Residue, grains in mm. 



I. Leckharapton ; 09 0-11 



11. „ 11 013 



III. „ 0-6 012 



IV. Chedworth Wood 1-5 014 



V. „ 1-2 Oil 



VI. „ 1-7 0-15 



The percentages of residue from Leckhampton are low, and cor- 

 respond closely with those in the Lower Freestone. The percentages 

 from Chedworth are higher, but this is due to the presence of 

 pyrites, which cannot be regarded as detrital material. 



The following table gives the results from the Ragstones : — 



Percentage of Average size 

 Insoluble of Quartz- 

 Residue, grains in ram. 



I. Chj2misG:Yii 5-0 019 



II. Grey Limestone O'S 018 



III. Gryphite Grit, Chedworth Wood 2-6 016 



IV. „ Leckhampton 2-8 010 



The Cly^eus Grit shows a rather higher percentage of residue^ 

 compared with the Upper and Lower Freestones or even the Oolite 

 Marl ; in fact, there is a relatively higher residue throughout 

 the Eagstones when compared with the Freestones. This is ex- 

 plained by the fact that the Eagstones underlie the Fuller's Earth, 

 and therefore indicate the coming in of conditions which ultimately 

 gave rise to that formation. 



In order that we may the better compare the quantity of residue 

 in the divisions of the Inferior Oolite, I give the following table of 

 averages: — 



Percentage of Average size 

 Insoluble of Quartz- 



Residue, grains in mm, 



Ragstones 2-8 017 



Upper Freestone, leaving out the blue variety. 11 012 



Oolite Marl 3-2 009 



LoAver Freestone 1 "8 013 



Pea-Grit Series 5-0 014 



Transition Beds 38-3 013 



The above table shows a great falling- off in the percentage of 

 residue above the Transition Beds. That of the Freestones is re- 

 markably low, and it would appear that these rocks were formed 

 under conditions which allowed of very little sediment being 

 deposited. 



The size of the quartz-grains in the Transition Beds averages 

 •13 mm. There is a slight increase in the Pea-Grit Series, and a 

 decrease in the Lower Freestone. The quartz-grains in the Oolite 



