86 PROCEEDINGS COTTESWOLD CLUB igio 



Grit, occurs very sporadically indeed, the Upper Coral-Bed — a 

 deposit which indicates by its wide extent in the Cotteswold 

 Hills, Bath-Doulting District, and Dundry Hill, near Bristol, a 

 prevalence of very similar conditions in this part of the West of 

 England at the time of its formation. It was by the discovery 

 at the Coombe-Hill Quarry, near Wotton-under-Edge, of a 

 specimen of Lissoceras psilodiscum (Schloenbach) that the date 

 of the deposit was first definitely fixed. 



(iii.) Doulting Stone or Clypeus-Gxii. — At Doulting the 

 Doulting Stone is about 44 feet thick, but at Midford only 

 II feet 9 inches. At the southern end of the South Cotteswolds 

 it is probably about the same, and has similar faunal and 

 lithic characters. Traced to the north, however, it gradually 

 changes. At the Horton- Rectory Quarry it is easy to see in the 

 massive-bedded local Clypeus-Gni of that locality, although it 

 has become more rubbly and fossiliferous, the equivalent of 

 the Doulting Stone : and even as far north • as Selsley and 

 Rodborough Hills, the massive character is still to a large 

 extent preserved in the equivalent deposit. It is possible that 

 the bottom-portion of the Doulting Stone, or local Clypeus- 

 Gxii, of certain localities is equivalent to the top-portion of the 

 Upper Coral-Bed of certain others. 



(ii.) /l«a&aafl-Limestones or White Oolite. — The Anabacia- 

 Limestones are generally very distinct in the Bath-Doulting 

 district on account of their being whiter and more fiaggy than 

 the underlying yellower and more massive-bedded Doulting 

 Stone, and are usually characterised by an abundance of 

 the little cora] A nabacia complanata (Defrance). At the south- 

 ern end of the South Cotteswolds they are much the same in 

 appearance, but at the Horton-Rectory Quarry they are some- 

 what softer and more oolitic ; while at Scar Hill, Nailsworth, 

 they have changed again, being more compact and less-con- 

 spicuously oolitic. Nevertheless, the identity of these limestones 

 of the more northern sections with those of the southern 

 is evident. North of Sodbury it is best to use Witchell's term 

 " White Oolite" for these beds, for the characteristic coral is 

 not abundant thence. Interesting to relate, however, when 

 the White Oolite has assumed the appearance of typical, rubbly 

 Clypeus-Gvit, along with the Doulting Stone, as in the Chelten- 

 ham district, this little coral is frequently in evidence, and at 

 places is quite common. 



