﻿316 
  Verrill 
  — 
  Notes 
  on 
  the 
  Geology 
  of 
  the 
  Bermudas. 
  

  

  XIV. 
  — 
  Mills 
  Breaker 
  Cut, 
  10 
  fathoms 
  deep, 
  leading 
  towards 
  an 
  

   irregular 
  sink 
  (not 
  shaded) 
  9 
  to 
  14 
  fathoms 
  deep, 
  and 
  

   about 
  2 
  miles 
  long. 
  

  

  XV. 
  — 
  Main 
  Ship 
  Channel 
  or 
  the 
  Narrows, 
  a 
  narrow 
  cut 
  leading 
  

   to 
  Murray 
  Anchorage. 
  

  

  Note. 
  — 
  The 
  map 
  is 
  much 
  altered 
  from 
  that 
  of 
  Agassiz 
  by 
  the 
  addition 
  of 
  the 
  

   three 
  contour 
  lines, 
  at 
  10, 
  20, 
  and 
  100 
  fathoms 
  depths: 
  by 
  shading 
  the 
  deeper 
  

   parts 
  of 
  the 
  larger 
  lagoons, 
  where 
  the 
  depth 
  exceeds 
  50 
  feet 
  ; 
  and 
  in 
  some 
  other 
  

   respects. 
  It 
  is 
  based 
  on 
  the 
  Admiralty 
  Chart, 
  reduced 
  by 
  photography. 
  

  

  

  Figure 
  2. 
  — 
  Cliff 
  of 
  seolian 
  limestone 
  on 
  the 
  South 
  shore, 
  showing 
  the 
  irregular 
  

   stratification 
  and 
  the 
  deeply 
  pitted 
  rough 
  surface 
  coated 
  and 
  infiltrated 
  with 
  

   calcite, 
  characteristic 
  of 
  most 
  of 
  the 
  cliffs 
  that 
  are 
  exposed 
  alternately 
  to 
  the 
  

   action 
  of 
  the 
  sea 
  spray 
  and 
  dry 
  air. 
  

  

  about 
  15 
  miles 
  in 
  length, 
  in 
  a 
  straight 
  line, 
  but 
  this 
  crescent 
  is 
  

   continued 
  around, 
  in 
  the 
  form 
  of 
  an 
  ellipse, 
  by 
  the 
  innumerable 
  

   submerged 
  or 
  nearly 
  submerged 
  flat 
  reefs, 
  many 
  of 
  which 
  are 
  

   bare 
  at 
  low 
  tides. 
  The 
  whole 
  ellipse 
  probably 
  covers 
  over 
  220 
  

   square 
  miles, 
  but 
  the 
  dry 
  land 
  contains 
  scarely 
  20 
  square 
  miles. 
  

  

  