4G8 
THE GEOLOGIST, 
with some dco-rcc of certainty to the Carlioniferous system, and of 
whicli tlicy will be fonud to constitaite some of the lowest members in 
Scotland. No Bvachiopoda or other shells have, however, been 
hitherto discovei-ed in these rocks ; and Mr. Young is acquainted 
with no other place where an equivalent to these beds has been found 
but in the Merse of Berwickshire to the south-east of Scotland, where 
they present the same thin-bedded character, and hold the same re- 
lation to the Old Red sandstone and overlying coal-nieasui'es which 
they do to the north of Glasgow. Above these beds in the valley of 
Campsie, thei'e occurs a series of thin-bedded strata, which appear to 
Mr. Young to be a continuation of the Ballagan series, over which 
a thick-bedded sandstone forais the floor of the valley, and contains 
numerous casts of plants, &c. In the immediate neighbourhood of 
Lennoxtown, a group of marine limestones and clay-ironstone, with 
intercalated beds of freshwater strata, containing cypridce and re- 
mains of fishes, is seen cropping out at the base of the north and 
south hills ; they all underlie the main coal and limestone, and seem 
to be the equivalent of the lowest fossiliferous beds of the Carluke dis- 
trict. Above these beds, in the district under description, occm's the 
Campsie main coal and limestone, with their accompanying alum- 
shales and freshwater limestone ; these beds being the equivalents of 
the Carluke main coal and limestone, and twenty-two fathoms above 
this are found a bed of marine limestone and shales with clay- 
ironstone bands, which may perhaps be considered on the same horizon 
with the " Hosie's" limestone in the Carluke-parish section. At four 
miles east of Campsie, on the north Hill, we come upon the very 
interesting section of Con'ie Burn, which Mr. Young has worked out 
with so much attention, and which consists of thick-bedded calcareous 
shales, coralline and encrinal-limestones, yellow sandstone, and numer- 
ous bands of clay-ironstone, which form the higher members of the 
series, the organic remains being very abundant in the strata, and of 
mountain-limestone types ; while the strata itself is the best exempli- 
fication we have of that group in this part of the country. It par- 
takes of the same dip as the beds in the valley of Campsie, viz., to 
the south-east, and may be regarded as belonging to the higher 
members of the lower marine series. In conclusion, we will append 
Mr. Young's lists of the various strata from which Brachiopoda have 
been derived to the north of Glasgow and valley of Campsie, as 
far as possible, showing the descending order of the series : 
Top, 1. Robroyston beds, near Glasgow : limestone and shales. 
2. Bishopbriggs beds, near Glasgow : limestone (impure) 
and shales. 
3. Limestone (cubny), Moodies-burn ; six miles south-east 
of Campsie. 
4. Corrie Burn beds : sandstone, limestone, ironstone, and 
shales ; four miles east of Campsie. 
■5 Balquarhage beds : limestone (culmy), shales, with iron- 
stone ; two miles south of Campsie. 
