﻿668 
  NEW 
  YOEK 
  STATE 
  MUSEUM 
  

  

  Top-set 
  beds. 
  Horizontal 
  or 
  gently 
  inclined 
  layers 
  of 
  gravel 
  and 
  sand 
  which 
  

   form 
  the 
  superficial 
  coating 
  of 
  glacial 
  sand 
  plains 
  or 
  deltas; 
  made 
  by 
  wander- 
  

   ing 
  aggrading 
  streams 
  usually 
  at 
  or 
  above 
  the 
  level 
  of 
  the 
  sea 
  or 
  lake 
  in 
  

   which 
  the 
  delta 
  is 
  building 
  

  

  Water-laid. 
  Said 
  of 
  detritus 
  deposited 
  by 
  water 
  

  

  Wisconsin 
  epoch. 
  Term 
  employed 
  in 
  this 
  report 
  for 
  East 
  Wisconsin, 
  the 
  name 
  

   proposed 
  by 
  Prof. 
  Chamberlin 
  for 
  the 
  last 
  glacial 
  epoch 
  in 
  the 
  state 
  named; 
  

   believed 
  to 
  include 
  the 
  time 
  of 
  formation 
  of 
  the 
  later 
  glacial 
  drift 
  in 
  the 
  

   eastern 
  United 
  States 
  from 
  the 
  terminal 
  moraine 
  northward 
  into 
  Canada 
  

  

  