82 The Carboniferous Limestone of West Gumherland. 



Shale, mudstone, or 



sandstone. 

 Spotted Beds . 



Thin Mudstone 

 Rough Beds 



Shale 

 White Beds 



Thickness. 



" Spotted," the " spots " being 

 large patches of pink staining on 

 light-grej'^ matrix .... 



Shale and mudstone (Glints) ; sand- 

 stone (Frizington) 



Thickly-bedded light-grey limestone 

 with two or three thm shales or 

 mudstones ; " spots " mainly dark- 

 grey (" matrix " light-grey), more 

 or less circular in one or two bands, 

 about 1 ha. in diam. in lower 

 portion, increasing upwards , 



Dark -grey limestone with pseudo- 

 breccia structure and " wavy " 

 bedding planes ; highly bituminous 

 towards base .... 



Shale, mudstone, and calcite-mud- 

 stone ..... 



White limestones in 5 or 6 beds with 

 3 or 4 mottled mudstones 1-10 feet 

 thick. Middle beds much worn by 

 contemporaneous channelling ; true 

 limestone - breccias in the mud- 

 stones ; lower beds faintly spotted. 

 Persistent evenly-bedded limestone- 

 breccia at base .... 



The Fourth Limestone. 

 Table IV. — Paleontology. 



S.W. 



ft. 



20 



N.E. 



ft. 



30 



30 



50 



35 



60 



55 



65. 



Black Chert Beds 



Junceum Beds 



Thin Mudstone . 

 Saccammina Beds 



Productus semireticulatiis Ma,vt., P. latissiimis S . Sow.. 

 AtJiyris planosulcata (Philh), chief brachiopods. 

 Corals not abundant ; Aulophyllum pachyendo- 

 thecum Thom., Syringopora reticulata Goldf., with 

 OhMetes depress us in wide-spreading flat sheets. 



Fauna particularly abundant ; some of the chief 

 forms : Productus giganteiis Mart, in a distinct 

 band near top of this bed, P. concinnus J. Sow., 

 P. scabriculus Mart., P. fimbriatus J. de C. Sow. 

 Martinia glabra (Mart.), M. ovalis (Phill.), 

 Spirifer grandicostatus McCoy are common. 

 Lithostrotion junceum (Flem.) in many distinct 

 bands with L. portlocki (Bronn) and L. 

 maccoyanum Edw. & H., Lonsdaleia duplicata 

 (Mart.) mut. alstonensis 8. Smith, Cyathophyllum 

 regium Phill., Michelinia tenuisepla (Phill.), 

 Dibunophyllum splendens Thorn., Glisiophyllum 

 cf. keyserlingi McCoy, Aulophyllum fungites 

 (Flem.) mut. cumbriense S. Smith, Hetero- 

 phylluni Lyelli Duncan, and a large form of 

 Diphyphyllum sp. are not found in any of the 

 other beds. Saccammina carteri Brady occurs at 

 base. 



Is crowded with Saccammina at Clints. 



Standard Dg-fauna but macroscopic fossils not 

 abundant. Saccammina carteri Brady [through- 

 out], but most plentiful in a band midway in 

 the beds. Orionastrcea ensijer S. Smith only from 

 here. 



