﻿PLEISTOCENE 
  GEOLOGY 
  OF 
  NASSAU 
  CO. 
  AND 
  BOROUGH 
  OF 
  QUEENS 
  667 
  

  

  Oiitwash. 
  Said 
  of 
  plains 
  of 
  gravel 
  and 
  sand 
  transported 
  by 
  glacial 
  streams 
  and 
  

   deposited 
  along 
  the 
  ice 
  front 
  

  

  Overwash. 
  Said 
  of 
  plains 
  of 
  sands 
  and 
  gravels 
  or 
  terraces 
  supposed 
  to 
  have 
  been 
  

   moraines 
  leveled 
  off 
  by 
  glacial 
  streams 
  along 
  an 
  ice 
  front 
  

  

  Parma. 
  Geologic 
  term 
  used 
  by 
  Suess 
  for 
  a 
  fold 
  in 
  strata 
  lying 
  in 
  advance 
  of 
  the 
  

   main 
  area 
  of 
  folds 
  in 
  a 
  system 
  of 
  folded 
  rocks 
  

  

  Piedmont. 
  Lying 
  at 
  the 
  base 
  of 
  the 
  mountain; 
  specifically 
  on 
  the 
  Atlantic 
  slope 
  

   of 
  North 
  America, 
  the 
  belt 
  of 
  ancient 
  rocks 
  of 
  little 
  or 
  moderate 
  relief 
  lying 
  

   between 
  the 
  coastal 
  plain 
  and 
  the 
  belt 
  of 
  mountainous 
  relief 
  farther 
  inland 
  

  

  Post. 
  Prefixed 
  to 
  the 
  name 
  of 
  a 
  geologic 
  period 
  or 
  epoch 
  to 
  denote 
  any 
  subse- 
  

   quent 
  time 
  

  

  Post-glacial. 
  Time 
  since 
  the 
  disappearance 
  of 
  the 
  great 
  ice 
  sheets 
  of 
  the 
  Pleis- 
  

   tocene 
  period; 
  in 
  some 
  writings, 
  the 
  time 
  immediately 
  following 
  the 
  last 
  

   glacial 
  epoch 
  

  

  Pre. 
  Prefixed 
  to 
  the 
  name 
  of 
  a 
  geologic 
  period 
  or 
  epoch 
  to 
  denote 
  any 
  or 
  all 
  

   previous 
  geologic 
  time; 
  in 
  a 
  narrow 
  sense, 
  the 
  immediately 
  preceding 
  time 
  

   or 
  rocks 
  peculiar 
  to 
  that 
  time; 
  as 
  in 
  

  

  Pre-glacial. 
  Term 
  generally 
  intended 
  to 
  refer 
  to 
  phenomena 
  immediately 
  pre- 
  

   ceding 
  the 
  glacial 
  period; 
  often 
  vaguely 
  used, 
  and 
  in 
  older 
  writings 
  often 
  

   applied 
  to 
  formations 
  now 
  understood 
  to 
  be 
  of 
  Pleistocene 
  age 
  but 
  older 
  than 
  

   the 
  last 
  or 
  Wisconsin 
  epoch 
  

  

  Quadrangle. 
  In 
  references 
  to 
  the 
  topographic 
  map 
  of 
  the 
  United 
  States, 
  one 
  of 
  

   the 
  four-cornered 
  divisions 
  of 
  land 
  corresponding 
  to 
  an 
  atlas 
  sheet; 
  the 
  area 
  

   mapped 
  as 
  distinguished 
  from 
  the 
  map 
  or 
  atlas 
  sheet 
  

  

  Retreat. 
  See 
  Glacial 
  retreat 
  

  

  Roche 
  moutonnee. 
  One 
  of 
  the 
  half 
  rounded 
  smoothed 
  knobs 
  of 
  rock 
  produced 
  

   by 
  glacial 
  erosion 
  

  

  Run 
  -off. 
  That 
  part 
  of 
  the 
  rainfall 
  which 
  discharges 
  into 
  the 
  streams 
  of 
  a 
  region 
  

   w^ithout 
  passing 
  underground 
  

  

  Sand 
  plain. 
  See 
  Glacial 
  sand 
  plains 
  

  

  Striation. 
  Act 
  of 
  scratching 
  the 
  surfaces 
  of 
  ledges 
  and 
  boulders 
  hj 
  the 
  movement 
  

   of 
  glaciers 
  

  

  Striae. 
  Scratches 
  or 
  furrows 
  produced 
  on 
  rock 
  surfaces 
  by 
  glacial 
  action 
  

  

  Tarn. 
  Small 
  lake, 
  as 
  in 
  the 
  glaciated 
  district 
  of 
  Scotland; 
  specifically, 
  a 
  moun- 
  

   tain 
  lakelet 
  of 
  glacial 
  origin, 
  a 
  rock 
  basin 
  

  

  Terminal 
  moraine. 
  In 
  North 
  America, 
  the 
  outermost 
  line 
  of 
  moraine 
  made 
  in 
  the 
  

   last 
  or 
  Wisconsin 
  ice 
  epoch 
  traceable 
  from 
  Nantucket 
  across 
  Marthas 
  Vine- 
  

   yard, 
  Block 
  Island, 
  Long 
  Island, 
  and 
  thence 
  westward 
  over 
  the 
  mainland 
  

  

  Terrane. 
  Any 
  definite 
  portion 
  of 
  the 
  earth's 
  crust 
  defined 
  by 
  its 
  geographic 
  

   position 
  or 
  its 
  geologic 
  age; 
  as 
  the 
  piedmont 
  terrane, 
  the 
  pre-Pleistocene 
  

   terrane 
  

  

  Thalweg. 
  Stream 
  channel 
  at 
  the 
  bottom 
  of 
  a 
  valley 
  

  

  Till. 
  In 
  the 
  widest 
  sense, 
  rock 
  debris 
  carried 
  and 
  deposited 
  by 
  the 
  direct 
  action 
  

   of 
  a 
  glacier; 
  typically, 
  a 
  more 
  or 
  less 
  compact 
  mass 
  of 
  boulders, 
  gravel, 
  witli 
  

   §and 
  or 
  clay, 
  without 
  stratification 
  aftd 
  pecessariiy 
  pf 
  glacial 
  origin 
  

  

  