Quart. Journ. Geol. Soc. Vol. LXVIII., PI. XXV. 



a black line, Keuper Marl overlies the rock. 

 The small numerals around the margins express 



of the rock-floor upon which the Trias rests. 

 The letter K placed in front of a numeral in- 

 dicates that Trias rests upon the rock; the 

 letter R similarly placed indicates that there is 

 no Trias, and that the level taken is the top 

 of the rock at the present time. The dotted 

 lines are contours of the buried rock, inferred 

 from the measurements and from othor obser- 

 vations; the contours are for lo-foot intervals 

 The red arrows indicate the dip of the Triassic 

 deposits, and the red numerals show the angle 

 of the dip. 



MAP 



OF 



BARDON HILL QUARRIES. 



