368 MAPS AND SJEOTIONS, 



Sheet 23. By B. N. Peach. (Loch Coulter and Denny). Southward 

 extension of Sheet 17 (see above), with similar geological features. 

 Part of the E. and W. Tertiary Basalt dyke traceable across Scotland 

 from Helensburgh to Grangemouth, occasionally occupying lines of 

 fault. 



Sheet 24. By B. N. Peach. (Hill of Airth, Larbert, Carron, and 

 Falkirk Ironworks.) Carboniferous Limestone Series, with outcrops of 

 coals, &c. ; Millstone Grit and Coal Measures, with crops of coals. Six 

 miles of the large fault above referred to (see Sheet 23) ; Boulder Clay, 

 Kaimes, Clays, &c. of the 100 feet Eaised Beach, Newer Eaised Beach 

 between Carron and the Forth ; Peat Bog of Lettan. 



Sheet 25. By B. N. Peach. (Grangemouth.) Millstone Grit and 

 Coal Measures, with coal outcrops under Eaised Beach and Eeceut 

 Estuary Mud of the Forth. E. end of the large dyke above referred to 

 (see Sheets 23, 24). 



Sheet 27. By R. L. Jack. (Strathblane, Mugdock Eeservoir, 

 Clachan of Campsie, Lennox Castle.) Calciferous Sandstone, Eed 

 Sandstone and Cement-stone groups (Ballagan Beds), the latter passing 

 under the bedded porphyrites of the Campsie Hills. Conglomeratic 

 base of the Carboniferous Limestone Series, resting on the foregoing. 

 Basin of the Harlet and Hosie Limestones and Coals ; " Necks " of 

 volcanic agglomerate of Calciferous Sandstone age. Intrusive Basalt 

 in sheets ; E. and "W. Tertiary dykes, including 5 miles of the dyke 

 above mentioned (Sheets 23, 24, and 25). Boulder Clay, Sand, and 

 Gravel. Glacial striae well-marked. 



Sheet 28. By B. N. Peach and R. L. Jack. (Lennox, Kilsyth.) 

 Calciferous Sandstone Series, Eed Sandstone and Cement Stone Group, 

 with base of the contemporaneous porphyrites and ashes of the Campsie 

 Hills. The whole of the Carboniferous Limestone Series, with outcrops 

 of limestones, coals, and ironstones ; Intrusive Felstone and Basalt in 

 sheets and dykes, including part of the dyke above referred to (Sheets 

 23, 24, 25, 27) ; Boulder Clay ; Sand and Gravel ; Alluvium of the 

 Kelvin Haughs ; Peat Bogs. 



Sheet 32. By R. L. Jack. (Milngavie, Balmore, Torrance of 

 Campsie.) Top of Bedded Traps of Campsie Hills. Gritty and Con- 

 glomeratic base of Carboniferous Limestone Series, with outcrops of 

 limestones and coals, and fault with downthrow of 100 fathoms ; Mill- 

 stone Grit ; Intrusive Sheets of Basalt; Boulder Clay ; Sand and Gravel ; 

 Alluvium ; line of very deep Drifts, supposed to be a buried river-channel. 



Sheet 33. By R. L. Jack. (Balquarrage, Inchbelly.) Carboni- 

 ferous Limestone Series, with outcrops of limestone and coals; Mill- 

 stone Grit ; Boulder Clay ; Sand and Gravel ; Alluvium. 



Sheet 35 (including Sheet 34). By B. N. Peach. (Slamannan, Avon 

 Bridge.) Coal Measures, with crops of numerous coal-seams ; Intrusive 

 Basalt in sheets and (Tertiary) dykes ; Boulder Clay; Sand and Gravel ; 

 Alluvium of Eiver Avon ; Peat Bogs. 



[Sheets 29, 30, 31, returned as published, were not reaUy out of the 

 engraver's hands.] E. L. J. 



