Geology of the Bermudas. 



389 



(1) The Walsingham Formation. This is Verrill's proposed name 

 for the older rocks that are in sight, and he has so named them from 

 the fact that in the north-east of the main island, round Harrington 

 Sound and Castle Harbour, is the best place to study these hard and 

 more or less crystalline seolian limestones. The beds are essentially 



Pig. 1. Ideal section of Bermuda Formations. W, Walsingham formation 

 (Pliocene) ; E, the red earth; D, Devonshire formation, Leda Clay (Glacial 

 of Prestwich) ; P, the Paget, Post-Glacial and Eecent formation. 



of the same nature as the rest of the Bermudian limestones of later 

 date, but by the infiltration of water supersaturated with calcic 

 carbonate the seolian character is largely masked, the bedding-planes 

 are nearly or altogether obliterated, and the hard limestone takes on 

 a generally homogeneous appearance. But in this formation there are 

 places where the shell sandstone of this age is friable and others 

 where the shell-sand is found in pockets quite unconsolidated. 



FlG. 2. Shell-conglomerate made up of a mass of shells of an extinct species 

 of land-snail, Pcecilozonites Nelsoni, etc. Drawn by G. M. Woodward 

 from the collection brought from Bermuda and presented to the British 

 Museum (Nat. Hist.) by Major Peile. 



