The Carboniferous Limestone of West Cumberland. 117 



I take this opportunity to acknowledge gratefully the financial 

 help afforded by a grant awarded to me by the Government Grant 

 Committee of the Koyal Society. 



My thanks are also due to those geologists who have kindly 

 assisted me in many ways. To Professor W. W. Watts I am 

 particularly grateful for continual encouragement and advice, for 

 facility to carry out part of the work at the Imperial College, and for 

 his kindness in reading the manuscript. 



Dr. T. F. Sibly has been good enough to look over some of my 

 zonal results, and I am indebted to Mr. C. B. Wedd for discussion 

 of the phenomena occurring near Matlock. Dr. A. Holmes and 

 Mr. H. C. Sargent have also helped me with suggestions and criticism. 

 The photomicrographs illustrating this paper are the work of Mr. G. S. 

 Sweeting, and I owe much both to him and to Mr. E. J. Tallin, 

 who has assisted me with the petrological part of the work. 



I am indebted to Mrs. L. M. Parsons for much help with the 

 manuscript, and I acknowledge the companionship of my friend 

 Dr. W. H. Turton, who has frequently accompanied me in the field. 



EXPLANATION OF PLATE VL 



FIG. 



L— Transition limestone, Di beds, Gratton Dale, x 23. Recrystallized 



calcite is not common, but occurs occasionally in patches as shown. 

 2. — Limestone immediately below the " basal " dolomite, Rainster Rocks. 



X 25. Dolomite rhomhohedra with included limonite (not zonal) scattered 



indiscriminately through matrix and organisms. 

 3.— Typical dolomite of the Harborough district. x 23. Specimen obtained 



near Manystones Quarry. Rather allotriomorphic and coarse grained. 

 4. — Coral in dolomite, Harborough Rocks, x 23. Matrix of dolomite having 



some zonal inclusions of limonite, coral (right) in dolomite free from such 



inclusions. Recrystallized calcite in internal spaces. (Cf. No. 3, 



Plate IV.) 



The Carboniferous Limestone Series of 

 West Cumberland. 



By Charles Edmonds. 



{Concluded from p. 83. ) 

 Shallow Water and Lagoon Phases. 



In a series which in no part can be described as other than shallow 

 water there are certain passage-beds, speaking of special and varying 

 conditions of deposition, which must be noted. At the very base 

 of the series dolomite-mudstones with ostracods and calcite- 

 mudstones with Sfirorhis-MV^ annelids, with thin interbedded 

 shales and limestone-bands with a standard marine fauna, denote 

 quiet lagoon conditions with occasional access to open sea. The 

 whole of the Seventh Limestone with its calcite-mudstones, china- 

 stone-lunestones and gasteropod-beds, totalling upwards of 150 feet 

 in places, represents generally shallow-water conditions, but there is 

 a remarkable absence of contemporaneous dolomitization in the 



