43 



be discerned in the datum line of railway. The Black shales xn 

 this section measure no less than 60 feet, the ^eds varying xn 

 thickness from 5 to 15 feet. I have no doubt thxs sec^on 

 agrees almost bed for bed with the two sections xn Watchett 

 Harbour. Great difficulty was experienced in determxnxng and 

 corellating the three sections, viz. this one, the ^-b^^;-^ 

 St. Audrey's, owing to the seaward posxtxon of the Haxbour 

 sections. When first constructed this Railway series afforded 

 xne much assistance and information. I append the details 

 as they were very exactly done at the time, but owing to 

 weathering and vegetation much is now obliterated. 



Eailway Section. 



Thirty-two beds of shales and impure Limestones were 

 carefully examined and measured in this Eailway citing 

 immediately south of the station, and which co-tituted «ie 

 entire thickness of the upper Rh.tic beds (at least) at th-^ 

 spot. The Grey and Tea Green Marls were below the datum 

 li,e of the railway. All these beds re-appear again north ot 

 ^e harbour, or north of the east and west fault that traverses 

 the shore, and are of great thickness. The -PP^L^^. '"'' 

 of the section compxises the White Lias, with Pecten Yaloniens.s 

 in the lowest Limestone band, but does not occur higlxer. ^me 

 feet of Black Shales with irregular bands of impure Limestone, 

 fdl of the same shell, underlie the White Lias, and at xts base 

 is a bed of hard chrystaUine Limestone, which is physicaUy 

 the same as that at Beer Crowcombe, and contains the same 

 fossils. Twenty-seven feet of Black Shales succeed, divided by 

 aband of impure grey earthy fossiliferous Limestone four inches 

 thick, and six feet six inches of Black Shales with a tlnn band 

 of ChrystaUine Limestone at their base containing also the Jieer 

 Crowcombe species; another set of shales six feet thick with 

 septaria below, and Mr. Moor's flinty bed, and a brown Lmies one 

 with fish remains, completes the Section so far as the Black 

 Shales are concerned. At the top of the underlying sandy 

 Marls I noticed, as at St. Audrey's, Anuelide bui-rows and 

 Myophoria ; all below was covered by the EaUway. 



