﻿418 



ME. L. EICHAEDSON ON THE EMETIC AND [Aug. I905, 



drive at Blue Lodge, near Siston, the White-Lias beds exposed are 

 as follows : — 



Thickness in feet inches. 



( Ostrea liassica, Proto 

 ^ Limestones, thin, with clay-partings. 



% Clay 



o 





I Limestone, in two beds with clay-parting. 



-j Clay, full of Ostrea : g- to 1| inches ... 



Limestone, sometimes in two beds 



( Clay or limestone 



< Limestone, often inconspicuous 



^ Brown and dark clay : 3 to 6 inches . 



B. Sun-Bed 1 



Clay 



Limestone, thin 



Limestone 



Clay-parting 



Limestone 



Shaly deposit 



C. Rubbly beds seen 1 



2 



1 

 4 



1 

 1 



4 

 1 



0* 



2 



7 

 0£ 



cardium Philip- 

 pianum. 



Pholadomya glabra. 



Ostrea liassica. 

 f Protocardium Philip- 

 \ pianum common. 



[Cotiiam Marble.] 



( Ostrea liassica, Lima 

 I valoniensis. Modiola 

 \ minima, Protocar- 

 ] dium Philippianum, 

 I Plicatula intus - 

 \ striata. 



The Sun-Bed is exposed in the quarry, but it will be observed 

 that below it is a deposit of which a thickness of 2 feet 2 inches is 

 seen, without any evidence of the Cotham Marble. But no doubt that 

 stratum would be found, if the excavation were a little deeper; and 

 then, below again, would occur the grey marls of the Upper Ehastic, 

 such as those seen in close proximity to the Carboniferous Limestone 

 seven-tenths of a mile south by 5° east of Abson Church. 1 



The rubbly beds (Cm the foregoing section) are interesting. 

 They seem to be present, as a rule, in the Bath district, but are 

 rarely exposed as they are of no industrial value, and quarrying 

 operations are therefore not prosecuted so deep down. These beds 

 are not present in the Lilliput section, but I recently (May 1905) 

 obtained evidence, from debris thrown out of a well, to show that 

 they do extend farther north than Blue Lodge, Siston, where they 



1 At an ochre-working, at the cross-roads near Gatheram Farm, Wick 

 Rocks, the following interesting section is exposed : — 



Thickness in feet inches. 

 /'Light-coloured, grey and yellow clay 



seen 2 9 

 Peculiar deposit of black and brown 



S J sandy clay, with impure limestone 



in places 



Sandy bed, with more or less angular 

 pieces of grit (the biggest measuring 

 2xUxlinch): £ to 2 inches 



Light-yellow and grey clay, with hard 

 masses of marlstone containing small 



quartz-pebbles about 2 



Reddish deposit, with yellow streaks... 1 



© | Yellow stone 1 



k^B Reddish stone, with yellow streaks 1 



p h I Hard, yellow stone : 5 to 7 inches 



^ EH I Working for ochre 



n S3 



H 



Sargodon tomicus 

 (Lepidotus?), Acro- 

 dus minimus (rare), 

 Gyrolepis Alberti, & 

 fragments of bone. 



