139 



Remarks on the Lias of Barrow in Leicestershire, compared with 

 the lower part of that Formation in Gloucestershire, Worcester- 

 shire, and Warwickshire. By the Rev. P. B. BRODIE, M.A., 

 F.G.S., Vice-President of the Warwickshire Naturalists' Field 

 Club. 



READ 27TH JANUARY 1857. 







DURING a late visit to the well-known Lias quarries at Barrow- 

 on-Soar, I was able to compare the various sections there 

 exposed with those in the equivalent beds in Warwickshire, 

 Worcestershire, and Gloucestershire ; and, although I could de- 

 tect no remains of Insects, nor even a trace of them *, the posi- 

 tion of the strata, and their lithological characters, are identical 

 with the true Insect limestones in the counties above men- 

 tioned. 



As Mr. Jukes has already described the lower Lias at Barrow 

 and the neighbourhood in ' Potter's Charnwood Forest/ it will 

 be needless for me to repeat those sections ; but it will be neces- 

 sary to give one not referred to by him, taken from an upper 

 quarry of Mr. Lee's, in order to identify the beds, where we 

 have, in descending order, 



ft. in. 



1 . Alluvial drift, sand and red clay/with rolled boulders of Lias 8 



2. Blue shale 3 



{Hard blue limestone (Rummels), with young Plagiostoma gi- "j 

 gantea, Lima rudis, and numerous Ammonites, similar to > 

 the Plagiostoma-bed in Gloucestershire J 



4. Thick blue shale 4 



6. Blue limestone (representative of Insect-bed) 6 



(I. Black shale 1 2 



7. Limestone (representative of Insect-bed) 6 



8. Black shale 1 



{Blue nodular and crystalline limestone (top hurls) a very "j 



peculiar band, resembling a bed near to the 'frestone ' of > 6 



Warwickshire, as at Grafton in that county J 



10. Shale. 



Bottom of quarry. 19 5 



As Mr. Jukes truly observes, the strata vary considerably 

 even in adjacent quarries certain beds thin out and others come 



* Although, in the short examination I was able to give the Barrow 

 limestones, I could discover no Insect remains, nor could hear of any 

 rvi-r having been found, it is possible that a closer research would detect 

 them. 



VOL. II. N 



