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  Lahee 
  — 
  New 
  Fossiliferous 
  Horizon 
  and 
  Underlying 
  

  

  The 
  area 
  to 
  be 
  described 
  (fig. 
  2) 
  is 
  a 
  strip 
  1J 
  miles 
  wide 
  and 
  

   7i 
  miles 
  long, 
  including 
  Fitch 
  Hill, 
  Blueberry 
  Mt., 
  Bald 
  Hill, 
  

   and 
  the 
  country 
  for 
  four 
  miles 
  southwest 
  of 
  Bald 
  Hill. 
  

  

  Blueberry 
  Mt. 
  and 
  its 
  vicinity 
  should 
  be 
  of 
  peculiar 
  interest 
  

   to 
  the 
  geologist 
  because 
  the 
  rocks 
  there 
  are 
  less 
  metamorphosed 
  

   than 
  those 
  anywhere 
  else 
  between 
  the 
  Connecticut 
  River 
  and 
  

   the 
  Franconia 
  range 
  of 
  the 
  White 
  Mountains, 
  and 
  because 
  most 
  

   of 
  the 
  fossils 
  obtained 
  in 
  northern 
  New 
  Hampshire 
  have 
  come 
  

   from 
  this 
  locality. 
  

  

  In 
  presenting 
  the 
  results 
  of 
  our 
  field 
  work 
  we 
  shall 
  describe 
  

   (1) 
  the 
  petrology, 
  structure, 
  and 
  stratigraphic 
  sequence 
  of 
  the 
  

  

  Fig. 
  1. 
  

  

  Pig. 
  1. 
  Outline 
  map 
  of 
  the 
  Ammonoosuc 
  district 
  in 
  New 
  Hampshire, 
  

   showing 
  the 
  position 
  of 
  the 
  area 
  (shaded) 
  included 
  in 
  fig. 
  2. 
  

  

  rocks 
  on 
  and 
  near 
  Fitch 
  Hill 
  ; 
  (2) 
  the 
  south 
  westward 
  distri- 
  

   bution 
  of 
  these 
  rocks 
  ; 
  and 
  (3) 
  the 
  new 
  fossiliferous 
  horizon 
  

   of 
  Blueberry 
  Mt. 
  

  

  Summary. 
  

  

  Following 
  is 
  a 
  summary 
  of 
  the 
  essential 
  facts 
  set 
  forth 
  in 
  

   this 
  paper 
  : 
  

  

  1. 
  A 
  metamorphic 
  igneous 
  rock, 
  herein 
  called 
  the 
  ' 
  Fitch 
  Hill 
  

   granite 
  gneiss,' 
  outcropping 
  in 
  the 
  township 
  of 
  Littleton, 
  N. 
  H., 
  

   displays 
  certain 
  variations 
  in 
  mineral 
  composition, 
  which 
  are 
  

   possibly 
  consequent 
  upon 
  original 
  magmatic 
  differentiation. 
  

  

  