220 Geology. 



CardiflF. Besides this important section, and other and per- 

 haps better known ones at the Aust Cliff and Westbury-on- 

 Severn, wherever cuttings are made through the Lower Lias 

 sufficiently deep to the Keuper Marls below, these character- 

 istic beds are opened up, and expose sections more or less 

 thick, but rarely exceeding from 50 to 100 ft. (Mr. Moore says 

 rarely more than 30 ft.) in our district. Besides the above- 

 mentioned sections, and others described by Mr. Moore in 

 the Quart. Journ. Geol. Soc, vols. xvii. and xxiii., a most 

 typical one was exposed during the construction of the Mid- 

 land Railway between Bath and Mangotsfield, at Newbridge- 

 hill near the Weston Station on that line, giving the following 

 succession of beds from the Red Keuper Marls, which were 

 just seen at the N.W. corner, through the shales and White 

 Lias to the Lima gigantea beds of the Lower Lias above :— 



Ft. In. 



Lower Lias, limestones, with brown and blue clay 



partings 

 Arenaceous shale, with osirea liassica 

 White Lias (" Sun bed,") divided by a filmy parting 



of yellow clay ... 

 White Lias, more or less solid 

 Rubbly White Lias, very fossiliferous 

 Blue clay, marly stone, and reddish brown clay 

 " Landscape " stone, cream coloured and blue, so-called 



" Cotham marble " ... ... ... .., 



Blue and grey shales, with Marlstone 



Bone bed, dark pyritous limestone, resting on black 



clays, and Keuper marls ... ... ... i o^ 



This section can be easily visited, being so close to Bath, and 

 shows one of the best developments of the White Lias in 

 the neighbourhood and has the advantage up to the pre- 

 sent time of remaining fairly free from talus (vide " Proc." 

 B. N. H. and A. F. Club, vol. ii., p. 208). 



