CANNINGTON PARK IJMESTONE. 129 



We now know more than one characteristic shell ; we 

 have many sheUs, corals, etc., from Cannington Park, 

 agreeing with fossUs common in the Mountain Limestone 

 of Mendip, to guide us, besides the oolitic structure and 

 general resemblance of the stones. Is it not likely there- 

 fore that the Cannington Limestone is an outlyer of the 

 Mendip strata, tlie southwest side of which dipa towards 

 the Quantocks, and probably passes deep under the inter- 

 vening valley, and is upUfted at this eastern branch of the 

 Grauwacke Hills? 



Since I had the pleasure of reading the above short 

 paper at our conversazione, in March, I have met with 

 some observations on the Cannington Park Limestone, in 

 the late Rev. D. Williams's manuscript work, from which 

 I make the following extracts : — 



« The fact of the Cannington Limestone being an out- 

 lying mass, and altogether insulated in the New Red 

 Sandstone, caused me for a tirae some doubt and embar- 

 rassment, as to its true position and relations. On a review 

 of all its circumstances, however, 1 entertain Uttle doubt 

 that it is a purer variety of the Withycombe, Doddington, 

 and Stowey Limestones, or, inversely, that the latter indi- 

 cate the Cannington Limestone to be passing out to the 

 westward, among the Old Bed Sandstone, by a less pure 

 — bv coarse arenaceous and carbonaceous beds. It is on 

 the'direct roll of the Old Red, from the Quantocks to- 

 wards the Mendips It commonly exhibits a 



very minute, concretionary-looking structure, consisting of 

 Uttle pale grey oviform and spheroidal granules, closely 

 packed together. . . . Organic remains are at times 

 abundant in thla Limestone, but usually so mmute, almost 

 mlcroscopic, that most of them, I beüeve, have hitherto 

 eluded Observation. They consist of minute plates and 

 1853, PART n. ^ 



