282 C. LAP WORTH ON THE MOFFAT SERIES. 



the Moffat beds themselves only the highest beds are visible. To 

 the south a group of grey shales, folded aud broken, crops out 

 immediately below the greywackes, with the lithological cha- 

 racters of the R.-maocimus band, and furnishing in excellent pre- 

 servation its peculiar fossils, Rastrites maccimus, Monograptus run- 

 cinatus, &c. 



Fig. 17. — Section in Eldinhope Eurn. 



D. Flagstones, shales, and greywackes. 



Cb. Grey shales with black and white seams, containing Rastrites maximus &c. 

 (2) Zone of Monograptus spinigerus. f. Fault. 



All the central beds are hidden from sight by masses of boulder- 

 clay and alluvium ; but on the north side of the arch a boss of black 

 shale emerges, and affords one of the finest sections of the M.-spini- 

 gerus zone in the south of Scotland. About 20 feet of its beds are 

 exposed, and show the peculiar cytheroid concretions, the Annelide- 

 trails, the grey ashy seams, the reticulated laminae, &c. we have 

 learnt to look for in the zone, and afford a host of indifferently pre- 

 served examples of its concomitant fossils, M. spinigerus (Mch.), 

 M. tenuis, &c. 



To the north these beds pass under a shattered group of grey and 

 black bands, with white-clay seams, which plunge below a fine cliff 

 of flaggy greywackes. 



Sundhope. — Some of the most fossiliferous beds of the M -spinigerus 

 zone are exposed on a small cliff on the side of the Yarrow, opposite 

 the farm of Sundhope. Fossils are abundant, and, as is almost 

 invariably the case with this zone, in a state of admirable pre- 

 servation. 



The flaggy greywackes are visible on both sides of the exposure ; 

 but the intermediate beds are not exhibited. 



(c) Black Band of Ettrick and Glenkiln. 



i. Ettrick River. — The black-shale bands traced by us from the 

 neighbourhood of St. Mary's Loch into the basin of the Ettrick are 

 continued to the south-east for a few miles beyond the watershed ; 

 but ultimately they subside, one by one, below the unbroken mass 

 of greywacke in that direction. To this rule, however, there is one 

 notable exception. The southern, or Berrybush, band, after dis- 

 appearing for a short time near Cossar Hill, again emerges, and, 

 sweeping in a gently curved line to the head of the valley of the 

 Ettrick, is prolonged in numerous disconnected exposures of black 

 shales as far as Glenkiln, near Dumfries. It demands especial 

 notice here, as it not only affords several sections of the strata of 



