﻿H. 
  R. 
  Mill 
  — 
  Glacial 
  Land-Forms 
  of 
  the 
  Alps. 
  123 
  

  

  southern 
  barrier. 
  The 
  eastern 
  side 
  of 
  the 
  amphitheater 
  in- 
  

   cludes 
  the 
  largest 
  moraine 
  hill 
  of 
  the 
  system, 
  so 
  large 
  that 
  it 
  

   by 
  no 
  means 
  belies 
  its 
  name 
  of 
  the 
  Serra. 
  It 
  is 
  a 
  ridge 
  more 
  

   than 
  12 
  miles 
  long, 
  and 
  in 
  its 
  highest 
  part 
  more 
  tlian 
  1300 
  feet 
  

   above 
  the 
  bottom 
  of 
  the 
  depression, 
  towards 
  which 
  the 
  sides 
  

   slope 
  at 
  an 
  angle 
  of 
  20°. 
  The 
  accumulation 
  is 
  the 
  result 
  of 
  

   several 
  glaciations, 
  the 
  moraine 
  externe, 
  or 
  early 
  bowlder-clay, 
  

   being 
  covered 
  with 
  a 
  red 
  weathered 
  crust 
  of 
  ferretto, 
  the 
  inter- 
  

   calation 
  of 
  which 
  between 
  the 
  older 
  and 
  newer 
  moraines 
  is 
  

   one 
  of 
  the 
  proofs 
  of 
  the 
  occurrence 
  of 
  an 
  interglacial 
  period. 
  

  

  A 
  railway 
  journey 
  next 
  morning 
  allowed 
  a 
  fine 
  forenoon 
  to 
  

   be 
  spent 
  in 
  driving 
  from 
  Lonato 
  to 
  Salo, 
  on 
  the 
  Garda 
  Lake, 
  

   through 
  moraines 
  and 
  fluvio-glacial 
  formations 
  — 
  some 
  of 
  them 
  

   compact 
  conglomerates. 
  Here 
  the 
  successive 
  glaciations 
  were 
  

   very 
  clearly 
  shown 
  in 
  several 
  sections, 
  the 
  lower 
  moraine 
  of 
  

   the 
  earlier 
  Ice 
  Age 
  having 
  its 
  pebbles 
  much 
  weathered 
  ; 
  in 
  

   some 
  cases 
  even 
  the 
  granites 
  had 
  crumbled 
  into 
  clay, 
  retaining 
  

   only 
  their 
  original 
  form. 
  Above 
  this 
  came 
  a 
  layer 
  of 
  conglom- 
  

   erate 
  formed 
  of 
  ice-scratched 
  pebbles 
  stratified 
  by 
  running 
  

   water, 
  and 
  on 
  the 
  top 
  a 
  fresher 
  bowlder-clay 
  much 
  less 
  weath- 
  

   ered 
  than 
  that 
  below. 
  

  

  Coming 
  up 
  the 
  Garda 
  Lake 
  at 
  night, 
  the 
  contrast 
  between 
  

   physical 
  and 
  political 
  geography 
  was 
  finely 
  shown 
  by 
  the 
  uni- 
  

   form 
  cliff 
  walls 
  and 
  continuous 
  water-surface 
  broken 
  by 
  the 
  

   long 
  beam 
  of 
  the 
  electric 
  search-light 
  at 
  the 
  Italian 
  frontier 
  

   station, 
  which 
  swept 
  the 
  lake 
  all 
  night 
  for 
  the 
  prevention 
  of 
  

   smuggling. 
  

  

  On 
  Thursday, 
  September 
  20, 
  the 
  excursion 
  left 
  Riva 
  by 
  rail 
  

   at 
  6'20, 
  and 
  had 
  an 
  excellent 
  opportunity, 
  on 
  the 
  journey 
  to 
  

   the 
  Brenner 
  line 
  at 
  Mori, 
  of 
  seeing 
  that 
  ice 
  is 
  not 
  the 
  only 
  

   agent 
  which 
  is 
  capable 
  of 
  producing 
  scenery 
  by 
  the 
  accumula- 
  

   tion 
  of 
  detritus. 
  The 
  landslip-covered 
  plateau 
  of 
  Loppo, 
  with 
  

   its 
  lake 
  formed 
  in 
  a 
  hollow 
  of 
  the 
  dolomitic 
  detritus, 
  and 
  the 
  

   still 
  more 
  extensive 
  piles 
  of 
  landslip 
  material 
  about 
  Mori, 
  con- 
  

   trasted 
  and 
  compared 
  in 
  many 
  ways 
  with 
  the 
  glacial 
  phenomena 
  

   seen 
  farther 
  south. 
  The 
  Austrian 
  Railway 
  Company 
  had 
  pro- 
  

   vided, 
  free 
  of 
  charge, 
  an 
  observation 
  car 
  at 
  the 
  end 
  of 
  the 
  

   train, 
  from 
  which 
  a 
  good 
  view 
  was 
  obtained 
  of 
  the 
  deltaic 
  

   wilderness 
  through 
  which 
  the 
  lateral 
  tributaries 
  entered 
  the 
  

   Adige, 
  and 
  of 
  the 
  extraordinary 
  fertility 
  of 
  the 
  alluvial 
  flats, 
  

   where 
  maize 
  and 
  vines 
  in 
  alternate 
  narrow 
  strips 
  covered 
  almost 
  

   all 
  the 
  available 
  land. 
  Later 
  the 
  porphyrite 
  gorges 
  marked 
  

   the 
  passage 
  across 
  the 
  center 
  of 
  the 
  range, 
  and 
  beyond 
  the 
  

   Brenner 
  saddle 
  carriages 
  were 
  provided 
  at 
  Matrei 
  to 
  allow 
  of 
  a 
  

   more 
  detailed 
  examination 
  of 
  the 
  terraces 
  of 
  the 
  Sill 
  valley 
  

   than 
  would 
  be 
  possible 
  from 
  the 
  train. 
  The 
  vastness 
  of 
  this 
  

   accumulation 
  of 
  moraine, 
  fluvio 
  glacial 
  deposit, 
  and 
  moraine 
  

  

  