Geology mid Geography. 397 



ti^atlons would be employed and acknowledged in the Government 

 Map. 



A notice was read by Mr Trevelyan on fossil wood frotn a bed 

 of clay lying above coal in Suderoe, the most northern of the Faroe 

 islands. 



Dr Hibbert read a paper on the ossiferous beds contained in the 

 basins of the Forth, the Clyde, and the Tay. 



He pointed out, in a general manner, the order of succession ob- 

 served by such beds as were deposited later than the primary and 

 transition schists. These were the peculiar grey micaceous sand- 

 stone, principally to be found on the north of the Tay, known by 

 the name of the Arbroath pavement ; the red sandstone, into which 

 the Arbroath pavement passes ; and the stupendous masses of con- 

 glomerate materials, formed by rolled fragments of primary and 

 transition rocks, which repose at the foot of the Grampians. It was 

 incidentally stated that, near Cratown, the conglomerate strata were 

 traversed by a trap rock, containing large crystals of glassy felspar, 

 which gave to it the exact character of one of the modem trachytes 

 of the Siebengebirge. The conglomerate rocks were supposed to 

 have been formed at two distinct epochs. The author expressed a 

 suspicion only that certain patches of sandstone, occurring both on 

 the east and west coast of Scotland, might be considered as New 

 Red Sandstones. 



That the greywacke schist and its associate beds of limestone 

 contain organic remains, has not yet been shewn. The author ex- 

 hibited a specimen of the Arbroath pavement containing vegetables, 

 and he stated that Mr Lindsay Carnegie of Kinblythmont in 

 Angus, had presented to the College Museum some striking speci- 

 mens of remains inclosed in the Arbroath pavement, one of which 

 appeared to belong to a crustaceous animal. [These were subse- 

 quently exhibited to the Geological Section by Professor Jameson.] 



But it was shewn that organic remains had been most abundant- 

 ly found in the later deposit of the carboniferous group, which the 

 author had previously described at the meetings of the Royal So- 

 ciety of Edinburgh. Certain limestones, for instance, namely, those 

 of Burdiehouse, East CiUder, Burntisland, &c. which he conceived 

 to be of fresh water origin, and belonging to the lower members of 

 the carboniferous group, severally contained both vegetable and 

 animal remains. 



The limestone of Kirkton, near Bathgate, was remarkable for its 

 mammillated and ribbonncd structure ; which last peculiarity was 



VOL. XVII. NO. XXXIV.— OCTOBER 1834. D d 



