UPPER LIAS : MARKET HARBOROUGH. 
281 
bottoms of these valleys being masked by superficial detritus* 
its beds are seldom exposed in them. 
" A few small outliers of Upper Lias rising above the plateaux 
of the Marlstone Rock-bed also exist, as those of Great Bowden, 
Slawston, Staunton Mill, and Barleythorpe, and some of these 
are capped by beds of Inferior Oolite. 
" The Upper Lias also forms a series of inliers in the midst of 
the Lower Oolite plateaux. Some of these form the bottoms of 
the valleys of the rivers which cut through these strata, which, 
as we shall show, thin out rapidly to the eastward, so that the 
Upper Lias is reached at comparatively small depths. This is 
the case in the parts of the valleys of the Glen, the Wansford 
Brook, and the Welland. In other cases, as at Stanion, Corby, 
and Helpstone brickyard, the Upper Lias is brought np by 
faults and exposed as inliers along the lines of certain small 
valleys."* 
Sections of the Basement-beds have been noticed by Prof. 
Judd, and the subdivisions appear to be persistent in the area 
The paper-shales and " Serpentinus Beds " have been noticed at 
Slawston Hill, between Hallaton and Keythorpe, at Barleythorpe 
near Oakham, and at Edmondthorpe. I have seen the paper- 
shales in a cutting north of Wymondham, on the Bourn and 
Saxby railway ; and a little further west about 12 feet of the 
shales, with a nodular band of Fish and Insect Limestone, were 
exposed. Crushed specimens of Ammonites serpentinus and 
A. communis occurred, but there was no evidence of the Transition 
Bed at the base of the Upper Lias. The beds rested on the 
Marlstone (see p. 238), and were covered in places by chalky 
Boulder Clay. 
At Great Bowden and Market Harborough there are two small 
outliers of Upper Lias. The only important sections here are in 
the Market Harborough brickyard, opposite to the railway-station, 
and in the adjoining railway-cutting. Here we have the following 
section described by Prof. Judd : 
Soil 1 ft. 
Boulder Clay - - - - 2 to 3 ft. 
(Laminated blue clay weathering to a 
yellow colour, with Ammonites com- 
munis and Belemnites compressus 1 to 4 ft. seen. 
("Hard, brown, ferruginous band of im- 
pure ironstone - - - 9 in. 
Softer and more sandy bed full of, 
Ammonites serpentinus. 
bifrons. 
communis. 
Basement Beds < 
communis. 
Holandrei. 
Belemnites compressus, 
and other 
Middle Lias 
fossils 
Hard, very ferruginous bed 
Light-blue, laminated clays 
A thin vein of sandstone (very incon 
stant) 
^Light-blue, laminated clays 
Marlstone Rock-bed. 
Din. 
3 to 6 in. 
3 to 4 ft. 
about 1 ft. 
5ft. 
* Judd, Geol. Rutland, pp. 80, 81. 
