Geological Society. 320 
PROCEEDINGS OF LEARNED SOCIETIES. 
GEOLOGICAL SOCIETY. 
June 20th, 1917.—Dr. Alfred Harker, F.R.S., President, 
in the Chair. 
The following communication was read :— 
‘The Inferior Oolite and Contiguous Deposits of the Crew- 
kerne District (Somerset).’ By Linsda]l Richardson, F.R.S.E., 
E.G.S. 
In this communication a detailed description is given of the 
Inferior Oolite of the Crewkerne District. 
Roughly speaking, the Upper Liassic Sands to the south-west 
of a line connecting South Petherton, Crewkerne, and South Perrott, 
are very similar to their equivalents in the Burton—Bradstock— 
Beaminster—Broadwindsor District. To the north-west of that 
line, however, limestones—largely made up of  shell-débris— 
replace a considerable portion of the yellow sands of mooret hemera, 
‘thickening’ from about 18 feet at North Perrott (‘ Perrott 
Stone’) to 78 feet at Ham Hill (‘Riddings’ and Ham-Hill 
Building-Stone). 
In the extreme south-western portion of this district, around 
say Drimpton, the Aalensis Beds are also probably very similar to 
their equivalents in the Burton—Bradstock—Beaminster—Broad- 
windsor District, and at Furzy Knaps, near Seavington St. Mary 
(4 miles north-west of Crewkerne), what is seen of them is 
highly fossiliferous. Hast of Crewkerne, however, these beds 
‘attenuate’ and ‘die out’ altogether between North Perrott and 
Yeovil Junction. 
~The Opaliniforme Beds at Broadwindsor, Whaddon Hill, and 
Chideock-Quarry Hill comprise, in descending order,— 
(a) Rusty Bed ; 
(b) Very fossiliferous sandstone; and 
(c) Sands and sandburrs. 
_ The equivalent of (6) is readily recognized at the Cathole Lane 
Section, Crewkerne, where it is very rich in ammonites. Above it 
are deposits which are with but little doubt equivalent to the Rusty 
Bed of more southern localities. Hast of Crewkerne, the Opalinz- 
forme Beds—like the Aalensis Beds—‘ attenuate,’ the lower beds 
apparently disappearing first. They ‘die out’ between East 
Chinnock and Yeovil Junction. 
