SECTIONAL TRANSACTIONS.— C. 345 



Craven Lowland (basin) facies together with limestone breccias similar to 

 the D t breccias of that area. 



These E.-W. belts of Visean sedimentation are comparable to those 

 of the Craven area and thus extend the Craven Reef Belt to the west under 

 Bowland Forest and link it with its western extension in the Isle of Man. 



The beds between the Carboniferous Limestone and the Millstone Grit 

 show a transition southwards from a shale, sandstone, limestone (Yoredale) 

 facies well exposed in Pinfold and Sellet Hall Becks to a shale (Bowland) 

 facies exposed in Kellet Hall Wood. Along the reef belt as at Swantley 

 the shales are overlapped and Millstone Grit rests almost directly on the 

 reef limestone. 



Mr. F. C. Slinger. — Millstone Grit and glacial geology of Caton Moor, 

 near Lancaster (11.30). 



A series of grits and shales of Millstone Grit age, and ranging from lower 

 E 2 to R x , are exposed on or near Caton Moor. The succession is as follows : 



Ft. 



Moorcock Flags and Hawkshead Grit . 100 



Claughton Moor Shales . . . 100-40 



Nottage Crag Grit .... 100-50 



Claughton Flag Series .... 200-100 



Caton Shales . . . . . 100 



Roeburndale Grit with thin coals . . 50 



Close Hill Shales .... 150-0 



Cocklett Scar Flags .... 150-10 



Wray Grits and Shales ... 50 



A boulder bed at the base of the Cocklett Scar Flags (i.e. near base of 

 E 2 ) indicates contemporaneous local movement. The Roeburndale Grit, the 

 upper layers of which are usually ganisteroid, contains two thin and 

 impersistent coals. The Caton Shales, the ' calcareous shales ' of the 1 in. 

 Geological Survey map, contain goniatites of late E 2 age ; the uppermost 

 band contains Cravenoceras holmesi, Anthracoceras discoides and A. cf. 

 paucilobum. The Claughton Flag Series (sandy shales and thin carbonace- 

 ous sandstones) contains a sparse fauna of marine lamellibranchs. The 

 Claughton Moor Shales are also in part marine. 



Correlation. — The Roeburndale Grit may be correlated with the Red 

 Scar Grit of Upper Nidderdale ; the Claughton Flag Series represents both 

 the Follifoot Grits and the Cayton Gill Beds. The Claughton Moor Shales 

 probably represent the lowest shale in the Brimham Grits of Nidderdale 

 and the shales with R. eoreticulatum and R. inconstans below the Addlethorpe 

 Grit of the area south of Harrogate. 



An olivine dolerite dyke of Tertiary age is intruded into the Caton 

 Shales. 



Glacial retreat phenomena are particularly well developed, and the posi- 

 tions of several minor halt stages can be determined. 



Mr. L. H. Tonks. — Geology of the Preston district (12.0). 



Dr. J. E. Richey and Dr. W. Q. Kennedy. — The succession of the 

 Moine Schists of Western Inverness-shire. 



A stratigraphical succession has been established in the Moine Schists 

 along the coastal region of western Inverness-shire between Mallaig and 



N 



