The relations of Dundry with the Dorset-Somerset* and Cotteswold 
areas during part of the Jurassic period, by S. 8. Buckman, 
F.G.8S. Read February 19th, 1889. 
The classical Hill of Dundry in North Somerset has always 
been mentioned by our foremost Geologists as an outlier of the 
Cotteswold range, from which it is distant some nine miles. If, 
however, we examine its Inferior Oolite, we find that the 
greater part thereof is both lithologically and paleontologically 
entirely different from the Cotteswold strata; but it is almost 
exactly similar to the Dorset beds. I need not enter into any 
lengthy details to demonstrate this; a few general facts will 
amply suffice. For instance, in the Cotteswold range between 
Bath and Little Sodbury, to the westward of which Dundry lies, 
we find, at the former place all the strata from the Jwrense- to the 
Parkinsoni-zone are wanting ; at the latter, the Murchisone-zone 
is represented by a few feet of white unfossiliferous limestone 
resting on rich ammonitiferous beds (opalinwm- and Jurense- 
zones, horizons almost unrepresented at Dundry), and between 
the Murchisone-zone and the overlying Parkinsoni-zone certain 
strata are wanting. At Dundry, however, the Murchisone-, Con- 
cavum-, Sauzei-, and Humphriesianum-zones are all represented. 
In no part of the Cotteswolds are the Sauzei- and Humphriesian- 
um-zones represented; only in the Northern Cotteswolds is the 
Concavum-zone present; while both the Concavum- and Murchi- 
sone-zones are entirely different in lithological character from 
the Dundry strata. 
Turning, however, to Sherborne in Dorset, Corton Downs 
in Somerset, and other places in the neighbourhood, we shall 
find that the strata agree almost exactly, lithologically, with 
Dundry; and the same may be said, as far as the Humphriesian- 
uwm-zone is concerned, if we go to Bayeux, in Normandy. 
* The Dorset-Somerset area means the district south of the Mendips. 
