86 



MAGNESIAN LIMESTONES, ETC. 



gYllert. DorseL II has been extensively worked for cement stone. 



Broad Bench, Dorset. Map 16. 



Wall-case 43. 



118. 



Carboniferous limestone, argillaceous li me . 



stone, used as a flux for smelting iron ore White Head 



Forest of Dean, Gloucestershire. ■ 



119. — Compact grey argillaceous limestone, speckled 



with Mic . 



Bedworth. Warwicksh 



from Coal Measures. 



From the same beds as 112, but of a different colour. 



120. 



Kime 



s 



ridge clay. — Freshwater Bay, near Kimeridge, coast of 

 Dorset. Map 16. 



121. — Cornstone, impure concretionary limestone, from 

 Old Red Sandstone. — Longhope, Gloucestershire. 



This limestone occurs in irregular concretionary masse 

 in Old Eed Sandstone, and from the scarcity of limestone 

 in certain districts, it is occasionally burned for lime for 

 agricultural purposes. 



122.— Cornstone, impure concretionary limestone, in Old 

 Red Sandstone. — Mitcheldean, Gloucestershire. 



123. — Magnesian conglomerate, from the New Red 

 Sandstone or Trias, composed of fragments of Carboniferous 

 limestone, in a calcareo- magnesian base, with a tooth of The- 



•Presented by 



codontosaurus. — Durdham D 



W 



124. — Dolomite or magnesian limestone, from the Car 



& 



Limestone. — Agasthorpe, Ashby -de-la- Zouche, 



Leicestershire. 



125. — Magnesian limestone, Permian, cementing frag- 

 ments of Carboniferous Limestone. — Durham. Presented 

 by Mr. King. 



126. — Granular magnesian limestone or dolomite, 



Carboniferous Limestone. — Breedon, Leicestershire. 



127. — Magnesian limestone, Permian, exhibiting fretted 

 divisional planes, produced by the percolation of water. 

 Mansfield Woodhouse, Notts. 



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