234 REPORTS ON THE STATE OF SCIENCE. 



known natural exposures and the feasibility or otherwise of opening up 

 additional transverse sections. 



Note. — The letters distinguishing the various beds on the following 

 pages are only applicable in each case to tlie individual sections under 

 description, and are not to be taken as implying correlation of strata. 

 The names employed are either existing appellations for strata or groups 

 of strata in use among geologists, or new names now proposed for adoption. 

 The latter, where used for the first time, are given with quotation marks. 

 The beds are in all cases described in descending order. 



No. 1. The Coinley Quarry Section. 



The rocks described in Part I. are those of the eastern portion of the 

 Quarry enclosure, and have long been exposed by the ordinary quarrying 

 operations carried out for the extraction of road metal. 



The rocks described in Part II. are those of the western portion of 

 the Quarry enclosure as laid bare for the first time by the present exca- 

 vations and by the clearing away of debris and overgrowth from an old 

 disused quarry face. 



All the strata have an approximately N. and S. strike, with an 

 easterly dip of about 70°. 



Owing to the working back of the Quarry face and some faulting the 

 section now to be seen is not quite the same as it was formerly. 



P.\RT I. Rocks previously exposed by the ordinary Quarryimj Operations. 

 East End of Section : — 



a. The Comley ' Quarry Ridye Grits,' with Paradoxides. 



Ft. 111. 



rt, Brownish, coarse, quartzose Orits with much glauconite and, in 

 places, becoming conglomeratic. Bedding planes, ill-defined, 

 at 2 to 3 feet intervals (top not seen) . . . . . 21 



fflj Conf/Ionwratic bed, becoming calcareous at the base, with a matrix 

 quite similar to that of the grits above (a,), but containing 

 (i) pebbles, (ii) rather large subangular to angular blocks of 

 rocks deri\ed from the beds below, and (iii) very many black 

 or brown lumps of phosphatic material ..... 3 



The included materials comprise : — 



(i) pebbles, more or less rounded, of quartz and of igneous rocks, one 

 of which compares very closely with the ' granitoidite ' of the 

 Cardington Hill volcanic group. 



(ii) lenticular pieces of limestone, some of which exactly corre- 

 spond with the ' French Grey Limstone ' bed d below, and 

 have, in the quarry, or in Section No. 2 (see page 236), or in 

 intervening natural exposures, yielded man}' fragments of 

 Olenellui referred to O. (^Holmia) Callavei, Lapw. ; Anomooare 

 (Aff7-aulos in the sense used by Walcott), a pustulate species 

 not yet identified ; Liniiarsonia and other Brachiopods ; and 

 subangular to angular pieces of greenis-h and yellowish mica- 

 ceous sandstone very similar to beds /below. 



(iii) black or brown lumps of phosphatic material, which are very 

 irregular in shape, often weathered out so as to form cavities ; 

 they may be contemporaneous with the formation of the bed 



Where very calcareous the matrix of the conglomerate is of a pinkish 

 grey colour very siruilar to that of th^ ' French Grey l^ime- 



