Page:Transactions of the Geological Society, 1st series, vol. 3.djvu/447

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Londonderry, Primitive mountain chain oi§ described 123
Lyas limestone, in the North of Ireland, described 130
── formation, in the North of Ireland, described 164
── of the South Western part of Somersetshire, described 367
── its junction with the red sandstone in Somersetshire 374
── its most western point in England is East Lynch 379
Lydian stone, found at Duntulm in Sky 98
Mac Culloch, John, M.D. Sketch of the Mineralogy of Sky 1
──────── A Geological Description of Glen Tilt 259
Magnet, Various rocks in Glen Tilt affecting the 324
Marble, at Strath in Sky, described 101
──── Observations on various sorts of Statuary 104
──── of Sky varying in hardness from the Trap veins traversing it 110
──── of Glen Tilt, described 282
Marie, Remarkable bed of, in the Green Sandstone of Londonderry 168
── containing land shells in Glen Tilt 316
Mesotype, found in various states in Sky 86
Mica slate, one of the oldest rocks in Sky 28
────── and Quartz rock generally alternating 28
────── its situation in Sky 28
────── found passing into Clay slate, Talc slate, and Chlorite slate, in Sky 29
────── contact with other stratified rocks at Loch Eishort 31
────── Numerous Trap veins in, in Sky 30
────── very generally distributed over the North of Ireland 136
Mourne Mountains, in Ireland, described 122-134
Mulattoe, the name given in Ireland to the Green sand 130
Murloch Bay, on the Coast of Antrim, described 203
Nomenclature. Dr. Mac Culloch's Observations on that of certain rocks 335