528 Geological Society. 



Depth 



No. of from the 



the Bed. Nature of the Bed. Thickness. Surface. 



Feet. In. Feet. In. 



23. Light blue clay 10 123 



24. Coarse light blue sand* 4 0* 127 



25. Dark blue clay 10 128 



26. Coarse light brown sand 3 6* 1316 



27. Dark blue clay 3 134 6 



28. Black sand and petrified wood 2 136 6 



29. Light brown clay 3 139 6 



30. Fine blue sand 6* 140 



31. White clay and yellow sand 2 0* 142 



32. Rock (metallic) 8 142 8 



33. Light brown sand 7 6* 150 2 



34. Very hard light rock 10 1512 



35. Fine blue sand 5 0* 156 2 



36. Fine blue sand and clay (with pebbles) . . 5 1612 



37. Light brown sand-rock 4 0* 165 Of 



38. Dark brown sand 2 0* 167 



39. Yellow sand and dark brown clay 40 1710 



40. Yellow sand and white clay 6 1716 



41. Dark brown clay 6 6 178 



42. Dark clay and black sand 7 0* 185 



43. Light brown clay (hard crust every 6 in.). . 44 229 



44. Hard blue sand-rock (blue clay in lamina;). 2 231 



45. White sand 4 3* 235 3 



46. Pipe-clay 15 250 3 



47. Black clay 6 9 257 



48. Brown clay 3 260 



49. Stone 10 2610 



50. White sand 5 266 



Total 266 2 



A letter, dated Glasgow, January 16, 1841, from Mr. Craig to Dr. 

 Buckland, " On the Boulder Deposits near Glasgow," was also read. 

 The sand- and gravel-beds of the banks of the Clyde are found, 

 Mr. Craig states, in many places besides the adjacent districts ; and 

 though wherever he has examined them they are superimposed on 

 the till, yet he does not know if they always occupy that position. 

 At Chapel Hall, at the height of 350 feet, a bone of a Mammoth or 

 Mastodon was found in a bed of laminated sand containing quartz 

 pebbles with fragments of coal-measures and overlying till. Similar 

 beds of sand occur near Eagleham, twelve miles south of Glasgow ; 

 and near Galston in Ayrshire, at the height of 500 feet. The sand- 

 beds near Toll Cross on the Hamilton road extend nearly to Broom 

 House Toll, where they rest on till. East of Glasgow the sands lie 

 in the form of a dyke between beds of clay, and extend from the 

 river to the College, where they are cut off by the whinstone dyke 



t The inches are omitted in the MS. 



