180 PROCEEDINGS COTTESWOLD CLUB . $1906 
EXCURSION TO LAVERNOCK, NEAR CARDIFF 
THURSDAY, JUNE 22nd, 1905 
Director : L. RICHARDSON 
(Report by the Director) 
The second Field Meeting was devoted to a study of the Rhetic 
and contiguous deposits exposed in the fine cliff-sections between 
Lavernock Point and St. Mary’s Well Bay, Sully. The following 
Members were present :—The Rev Walter Butt (President) ; the Rev* 
H. H. Winwood, F.G.S., Dr C. Callaway, F.G.S., (Vice-Presidents) ; 
Mr A. S. Helps (Hon. Treasurer); Mr L. Richardson (Hon. Secretary); 
Lieut.-Col. J. C. Duke, Dep.-Sur.-Gen. G. A. Watson, Rev J. Evans, 
Messrs W. Bishop, W. R. Carles, F.L.S., W. Crooke, F.A.I., G. M. 
Currie, O. H. Fowler, C. E. Gael, J. W. Gray, F.G.S., F. Hannam- 
Clark, W. H. Jordan, H. Knowles, M. Margetson, V. A. Smith, C. 
Upton, Col. D, O’C. Raye, and Messrs J. H. Collett and H. I. 
Randall came as visitors. 
The party reached Lavernock Station at 12.38 p.m. and walked to 
Lavernock Point where they lunched. Whilst the Members were 
finishing their repast, Mr Richardson briefly described the geological 
history from the close of Coal-Measure times until the Rheetic Epoch. 
North of the deeply indented little bay, where the Members lunched, 
are seen the red marls of the Keuper, overlain by the ‘‘Tea-green and 
Grey Marls,” these by the Rhetic Black Shales, which in turn are 
succeeded by the greater portion of the Upper Rhetic. Then follow 
the regularly-bedded limestones of the Ostrea- and Planorbis-beds. 
Round the Point the strata are seen to be synclinally arranged and 
filling in the centre of the syncline are the grey shaly clays locally 
called the ‘‘ Lavernock Shales.”” Westwards older deposits rise up 
and the ‘‘ Tea-green and Grey Marls” are seen again at St. Mary’s 
Well Bay, Sully. 
Certain portions of the upper beds of the ‘‘ Grey and Tea-green 
Marls” are of a black colour, and the highest beds are fairly massive 
marlstones with very much water-worn surfaces (Plate VI., fig. 1.) 
Resting upon the marlstones is the very fossiliferous Bone-Bed locally 
called the ‘‘Fish-Bed.” The equivalent of the Bone-Bed of Garden Cliff 
occurs about 4 feet above this ‘‘ Fish-Bed.” Black Shales with the 
usual Lower-Rheetic fossils and two massive /ecten-limestones com- 
plete the Lower-Rheetic Stage. 
