﻿CLAYS 
  OF 
  NEW 
  YORK 
  616 
  

  

  The 
  brick 
  clays 
  are 
  of 
  course 
  found 
  at 
  niany 
  localities 
  and 
  are 
  

   most 
  extensive 
  at 
  Jacksonville. 
  

  

  Fullers' 
  earth 
  was 
  first 
  discovered 
  at 
  Quincy, 
  Fla.; 
  it 
  has 
  been 
  

   mined 
  more 
  at 
  that 
  point 
  than 
  at 
  any 
  other, 
  but 
  it 
  is 
  known, 
  to 
  occur 
  

   at 
  several 
  localities 
  between 
  Quincy 
  and 
  River 
  Junction, 
  as 
  well 
  as 
  

   outcrop 
  at 
  several 
  places 
  around 
  Tampa 
  bay. 
  

  

  Georgia 
  

  

  Building 
  brick 
  are 
  made 
  at 
  many 
  localities, 
  either 
  from 
  alluvial 
  

   clays 
  found 
  in 
  the 
  river 
  valleys 
  or 
  from 
  residual 
  clays 
  which 
  occur 
  

   everywhere 
  in 
  the 
  area 
  underlain 
  by 
  the 
  crystalline 
  rocks. 
  

  

  Kaolin, 
  sometimes 
  of 
  a 
  pure 
  white 
  color, 
  occurs 
  in 
  pockets 
  in 
  the 
  

   residual 
  earths 
  of 
  the 
  Ejqox 
  dolomite, 
  while 
  clays 
  resulting 
  from 
  the 
  

   decay 
  of 
  the 
  Paleozoic 
  rocks 
  are 
  also 
  common, 
  but 
  many 
  of 
  tliem 
  

   are 
  easily 
  fused. 
  (J. 
  W. 
  Spencer. 
  Report 
  on 
  the 
  Paleozoic 
  forma- 
  

   tions 
  of 
  Georgia, 
  1893) 
  According 
  to 
  Prof. 
  Spencer, 
  the 
  most 
  

   extensive 
  clay 
  deposits 
  occur 
  along 
  the 
  northern 
  belts 
  of 
  the 
  Ter- 
  

   tiary 
  strata 
  in 
  the 
  southern 
  part 
  of 
  the 
  state. 
  

  

  The 
  Potomac 
  formation 
  specially 
  contains 
  many 
  clays 
  of 
  a 
  white 
  

   or 
  nearly 
  white 
  color, 
  which 
  are 
  often 
  of 
  a 
  very 
  high 
  refractory 
  

   quality. 
  (G. 
  E. 
  Ladd. 
  American 
  geologist. 
  Ap. 
  1899. 
  p. 
  240) 
  

  

  Indiana 
  

  

  In 
  reoent 
  years 
  two 
  important 
  contributions 
  bearing 
  on 
  the 
  clay 
  

   resources 
  of 
  Indiana 
  have 
  been 
  published 
  by 
  the 
  present 
  state 
  

   geologist. 
  {See 
  20th 
  and 
  22d 
  ann, 
  repH 
  Ind. 
  geol, 
  sur.) 
  

  

  In 
  speaking 
  of 
  the 
  Indiana 
  clays 
  in 
  general, 
  it 
  can 
  be 
  said 
  that 
  

   there 
  are 
  

  

  1 
  Reeidual 
  clays, 
  viz, 
  a) 
  rock 
  kaolins 
  of 
  Lawrence 
  and 
  adjoin- 
  

   ing 
  counties, 
  h) 
  surface 
  clays 
  of 
  the 
  driftless 
  area 
  of 
  southern 
  

   Indiana 
  

  

  2 
  Sedimeaitary 
  clays 
  including 
  a) 
  shales 
  and 
  fire 
  clays 
  of 
  Paleo- 
  

  

  