VOL. XVI.(1) TOP-BEDS OF INFERIOR OOLITE 73 
The only geologist who has paid any serious attention 
to these “Top-Beds” in the neighbourhood of Stroud is 
Edwin Witchell.*| He made the following subdivision of 
them at Rodborough Hill :— 
Thickness in 
feet inches 
1. White Oolite : seen ny ah us Kop alee Bhat) 
2. Clypeus-Grit ; brown, friable, sande or gritty 
beds, largely composed of Zerebratula globata 2 6 
3. Clypeus-Grit; brown, rubbly limestone; Zeze- 
bratula globata, abundant, Rhynchonella suble- 
trahedra, Holectypus depressus, H. ie titan 
Nerinaa Guisei, etc. ... oe) 
4. Limestones, hard, brown, fine- grained; ateraet 
destitute of fossils 26 iG 
5. Limestones, hard, brown; casts of Piacnie 
sp., Pholadomya sp., etc. oP day ogee Fe) 
6. Upper Coral-Bed .. oF a 03 ed ae a 
7. Upper Zrigonia-Grit 
On Rodborough Hill and its south-easterly prolongation 
are three principal quarries—those at “The Fort,” Mount 
Vernon, and Mount Surat. The first is abandoned, but 
the second and third are in work. It is only, however, at 
the Mount-Vernon Quarry that the Upper Coral-Bed is 
present, and therefore this section is given first. 
MOUNT-VERNON QARRY, RODBOROUGH HILL 
Thickness tn 
Jeet inches 
Clypeus- 1. Limestone, pinkish-grey, with large oolite 
Grit. granules ; Zerebratula globata, Sow. Be- 
comes less fossiliferous and better-bedded 
in the lower portion which belongs to 
Witchell’s ‘‘ brown limestones”: seen Boe 7G 
Upper 2. Limestones, white, irregularly - bedded; 
Coral-Bed Anabacia complanata (Defrance): not 
usually distinctly marked off from the bed 
belowr a. ... es oh te vanes iB eda? 
1 See Proc. Cotteswold Nat. F. C., Vol. vii, pt. 2 (for 1879-80), pp. 119, 120; and 
“ Geology of Stroud,” 1882, pp. 53, 54; ond 60- ba. 
2 This bed is only tentatively assigned to the Upper Coral-Bed, but there is no doubt 
about bed 3. 
