292 ME. T. 0. BOSWOETH ON THE [June 1912^ 



EXPLANATION OF PLATES XIX-XXVI. 

 Plate XIX. 



Fig. 1. Croft Quarry, showing a view of the localities C, D. A, B, marked on. 

 the map, Pi. XXIII. 

 2. Steep rock-slope found beneath Xeuper Marl at the north side of Clint 

 Hill Quarry, Stoney Stanton. 



Plate XX. 



Fig. 1. Fretted 'nuggets' of 'syenite' found in Keuper Marl at Croft Quarry. 

 2. TJnweathered angular rock-fragment, 12 inches long, found in Keuper 

 Marl 5 feet above rock, at Sheet Hedges Wood Quarry, Groby, in 

 1906. 



Plate XXI. 



Fig. 1. Complete section around Groby Village Quarry, lettered to correspond 

 with fig. 1 (p. 282) and PI. XXIII. 



2. Section in Sheet Hedges Wood Quarry, Groby, showing catenary 



bedding in a gully. 



3. Section in the mineral railway-line leading out of Lanes Hill Quarry, 



Stoney Stanton, showing Keuper Marls tipping away from a buried 

 rock-slope. 



Plate XXII. 



General geological map of the country around Charnwood, on the scale of 

 2 miles to the inch (or 1 : 126,720), showing the relation of the Trias to the 

 Charnian rocks, and also indicating the direction of the winds which controlled 

 the water-ripples. 



Plate XXIII. 



Map of quarry in Groby Yillage, showing the contours of the buried hill. 

 (Scale, 1 : 2500.) 



Plate XXIV. 



Map of Croft Quarry, showing the contours of the buried rocks. (Scale^ 

 1 : 2500.) 



Plate XXV. 



Map of Bardon Hill Quarries, showing the contours of the buried hills. 

 (Scale, 1 : 2500.) 



Platk XXVI. 



Map of Sheet Hedges Wood Quarry, Groby, showing the contours of the 

 buried hills. (Scale, 1 : 2500.) 



Discussion. 



Mr. Beenaed Smith drew attention to the conditions obtaining 

 during Keuper times in Nottinghamshire, where the recent geological 

 survey had just been brought to a close. This area lay to the east of 

 high land, composed of uplifted Carboniferous rocks, upon which dry 

 continental conditions of climate prevailed. During Keuper times 

 the east and south of Nottinghamshire appears to have been the 

 site of a very shallow (but widespread) inland sea or lake, subject 

 to fluctuation in breadth and depth during wet and dry seasons. As 

 a result of investigation, more particularly upon the ' skerries,' he 

 concluded that the marls were laid down almost entirely in water ; 

 but that dry land may have been from time to time exposed, owing 

 to fluctuations in water-level. Direct evidence of this was diflScult 



