C. LAPWORTH ON THE MOFFAT SERIES. 297 



(b) Basin of the Meggat, 



The five exposures apparent in the valley of the Meggat possibly 

 indicate the presence of two parallel bands of the Moffat Shales. It 

 is very doubtful whether they have any definite relation to the anti- 

 clinals already described. 



Sy art-Law Score. — The largest exhibition of the black shales in 

 this area is found in a deep gash or score in the northern flank of 

 Syart Law, opposite the farmhouse of Cramalt. The beds visible 

 are chiefly those of the Lower Hartfell Shales. They are greatly 

 disturbed and altered. The most fossiliferous seam belongs to the 

 central portion of the zone of Dicranograptus Clingani. It affords 

 good examples of Lasiograptus margaritatus (Lapw.), Diplograptus 

 foliaceus (Murchison), D. truncatus (Lapw.), Dicranograptus ramosus 

 (Hall), &nADicellograptusForchhammeri (Geinitz) in several varieties. 



The higher portion of the zone of Pleurograptus linearis is also 

 fossiliferous, yielding numerous specimens of Diplograptus quadri- 

 mueronatus (Hall), Leptograptus flaccidus (Hall), &c. 



Craigierig. — About half a mile distant from the former locality, 

 and in the prolongation of the strike of the rocks, the highest beds 

 of the Lower Birkhill Shales are shown in the small stream at the 

 back of the shepherd's cottage of Craigierig. Only a few feet of the 

 fossiliferous portion of the dark shales are visible. They yield ad- 

 mirable examples of Monograptus lobiferus (M'Coy), Diplograptus 

 sinuatus (Mch.), D. tamariscus (Nich.), and Rastrites capillaris 

 (Carr.). 



Similar beds are seen on the opposite side of Syart-Law Score, in 

 the burn of Shielhope (see map, PI. XL). 



Boar Clench (fig. 24). — A small but very important section of 

 the black shales occurs in the gorge of the Boar Cleuch, a tribu- 

 tary of the Glengaber. The lowest beds visible in the floor of 

 the gully are the hard black flags of the zone of Diplograptus 

 vesicidosus. They are covered on both sides by the softer strata 

 of the D.-gregarius zone, with their peculiar pyritous and varie- 

 gated mudstones, containing scattered examples of Monograptus 

 gregarius (Lapw.), Diplograptus folium (His.), Dawsonia campa- 

 nidata, &c. 



Fig. 24. — Section of Boar Cleuch, Glengaber Burn, 



"'• '^$^*!^^ D. Coarse grits and flagstones. 



•^^ ,/" Mlm^ jo ^' ^ re J all( l purple flags and shales, 



^llllP^ ^'^Hf' non-fossiliferous. 



n. /// ^^^^ ?A .-"*\/C ^ a ' -^ a £gy black shales with seams 



Ch ' ^^^^^.'-^^^^ Ci ' of coloured shales. {Monograp- 



^fjgaaaJE^y tus gregarius, Diplograptus ve- 



*^^W8^ siculosus, &c.) 



The peculiar shattery band at the summit of the zone passes below 

 a thickness of 60 or 70 feet of hard grey flaggy shales, which gra- 

 Q. J. G. S. No. 134. x 



