part 2] LIMESTONK OF THE LEICESTERSHIBE COALFIELD. 07 



skin, which sometimes reveals impi-essions of coral. These impres- 

 sions arc mci'c surface-markings which are mostly indeterminate, 

 and although coral structures exist in the rock, they too are so in- 

 distinct that sections are generally of even less value than the 

 surface-markings. Undoubted sj^ecimens of Cyathophyllum aff. 

 murchiioni occur in the rock; but the massive bedding and hard- 

 ness of the dolomite make it almost imix)ssible to extract them. 

 Other sui-face-impressions indicate the presence of large single 

 corals having a complex tabulate area, but it is innxissiblc to refer 

 them definitely to DihunophijUum or any other genus. 



Good sj)ccimens of Lithoat ration irregulare have been found, 

 and this suggests that the eastern beds are not lower than 1),, a 

 point supported by the total thickness of rock in the inlier, and by 

 other evidence. 



Syriiu/opora occurs particularly in certain beds at the extreme 

 eastern end, where masses of shells resembling papilionaceous 

 CJiouetea are also found : but a s})ecilic determination of these is 

 not ])Ossiblc. 



Breedon Cloud. 



A distance of three-(|uarters of a mile separates the two Breedons. 

 The quarry-face of the Cloud works extends for a length of about 

 500 yards, and is very often par.illel to the strike : consequently 

 the .section is not so useful as that at Breedon-on-the-Hill, 



The Carboniferous Limestone sequence at Breedon Cloud is as 

 follows : - 



r 3. Thinly-be<Me<l re<l dolomites with very thin shaly partings. 

 P.^-D.,.< 2. Yellow dolomites, apparently of • ccmtemporaneous ' origin, and 



[ C(mtaining a variable quantity of chert. 



Part of ri. Yellow dolomites yielding Proibirfus /i»/iH<?rojji/«. but containing 

 D,. I no chert. 



(Thickness unknown.) 



On account of the amount of material removed by quarrying 

 oj)erations and the })resence of many heaps of refuse, etc., an 

 accurate statement can hardly be made concerning the actual 

 thickness of the subdivisions. A few points concerning the 

 divisions enumerated alH)Ve may be noted here. 



The lower, relatively barren, yellow dolomites yielding Producfus 

 Iiinnfrottiis, Ci/rfina srpfoaa, and Piignax ptignus are best seen at 

 the extreme northern end of the works, where faulting has pro- 

 duced a certain amount of lateral displacement. The positions 

 where Pr. hitincrnsua was obtained are indicated on the plan 

 (fig. 2, )). OS) by the letter H. 



These beds are evidently equivalent to the corresi>onding 

 hunu'romia dolomites at lireedon-on-the-Hill. At one other ]>oint 

 towards the southern end of the inlier I obtained the s;ime s|X'cies 

 of PnuliK'tKx at the top of the hill, a little distance east of the 

 large amphitheatral cpuirry marked B on the plan. In no part of 

 these beds was any chert found. 



The succeeding' v.-llow dolomites form the bulk ,.f tli.' fXDose.l 



