160 
THE GEOLOGIST. 
Mers of Berwickshire. 
7. Next in order are some thick beds of reddish sandstone^ 
underlying 
8. Carboniferous strata_, consisting of sandstone^ shales &c.^ 
including three or four coal-seams. 
9. The encrinal limestone, seen a litle north of Berwick. 
Mr Stevenson remarks that the Berwickshire carboniferous 
strata appears to correspond with the lower beds of the Eife and 
Lothian coal-fields, considered by Mr. Milne and others to belong 
to the mountain limestone, and to be considerably lower than 
the Newcastle coal strata. With regard to the inquiry whether 
new red sandstone exists in Berwickshire, Mr, Stevenson is in- 
clined to answer it in the negative. He regards the beds at 
Cumledge, described by Mr. Milne as such, as old red, and con- 
siders the soft red clays and sands at Lintlaw, derived from the 
disintegration of the old red sandstone, referred by Mr. Milne to 
the new red sandstone, to be of undetermined age, from want 
of sufficient evidence in the absence of organic remains. The 
exact position of the greywacke strata of the Lammermuirs is 
for the same reason indeterminate. The author concludes by 
pointing out the great gap which occurs between the greywacke 
and the upper division of the old red sandstone in Bei*^ ickshne, 
the middle and lower divisions of the old red and the whole of 
the Silurian system being deficient. Another circumstance wor- 
thy of remark is the absence of any formations more recent than 
the coal-measures, if we except alluvial deposits and the undeter- 
mined red strata formerly mentioned. 
Feh. \st, 1843. The President, in the chair. A paper was 
read " On the Tertiary Strata of the Island of Martha^ s Vineyard 
in Massachusetts J' By Charles Lyell Esq., V.P.G.S., &c. 
The most northern limit to which the tertiary strata border- 
ing the Atlantic have been traced in the United States is in 
Massachusets in Martha's Vineyard, lat. 41° 20' north, an island 
