warman]  UINKARET UNKAR.  799 
Unconformity,  phenomena  indicating,  time  represented  by,  etc.  .Ann  16,  i,  pp  724-734 
relations  of  folding  to Ann  16,  r,  pp  632-633,  804-807 
Underground  waters,  action  of WS  29,  pp  14-18 
classification  of Mon  xxxviii,  pp  550-552 
of  California,  Arroyo  Seco  and  Pasadena  Mesa Ann  20,  iv,  pp  543-549 
of  Colorado WS  9,  pp  79-87 
Arkansas  Valley Ann  17,  n,  pp  551-601 
of  Great  Plains,  portion  of Ann  16,  n,  pp  548-550,  557-565 
< if  I  llinois-Indiana,  Danville  quadrangle GF  67,  pp  7-9 
of  Kansas,  southwestern WS  (i 
of  Maryland,  Fredericksburg  quadrangle GF  13,  p.  6 
Nomini  quadrangle GF  23,  p  4 
Washington  quadrangle GF  70,  p  7 
of  Nebraska,  portion  of  southeastern WS  12 
of  South  Dakota,  Black  Hills,  southern  part Ann  21,  iv,  pp  563-574 
of  Texas,  Edwards  Plateau  and  RioGrande  Plain . Ann  18,  n,  pp  264-321 
Nueces  quadrangle G  F  42,  pp  3-4 
of  Virginia,  Fredericksburg  quadrangle GF  13,  p  6 
Nomini  quadrangle GF  23,  p  4 
Washington  I  I).  C. )  quadrangle GF  70,  p  7 
of  Wyoming,  Black  Hills,  southern  part Ann  21,  iv,  pp  563-574 
principles  governing Vnn  21 ,  vn,  pp  387-394 
(See  Water,  artesian;  Water,  ground.) 
Undertow,  function  of,  in  littoral  erosion Vnn  •  >,  pp  82-83;   Mon  i,  pp  33,  38 
Unga  c< >ngloi aerate  of  Alaska Bull  84,  pp  234-235,  336 
remarks  on Ann  17,  i,  p  836 
linger  (Franz),  biographic  sketch  of Ann  5,  p  375 
Ungulinidse  of  Miocene  marls  of  New  Jersey Mon  xxiv,  pp  61-62 
Unkpapa  sandstone  of  Black  Hills Ann  21,  iv,  pp  524-525 
Unicoi  sandstone  of  Virginia  and  Tennessee GF  59,  p  3 
Unionidse  of  Bear  River  formation Bull  128,  pp  34-36 
of  clays  near  Camden,  New  Jersey Mon  ix,  pp  243-252 
of  Colorado  formation Bull  106,  p  95 
of  Great  Basin,  Pleistocene  and  recent Bull  1 1,  pp  14-15 
of  John  Day  group  of  Oregon Bull  18,  pp  1 3-14 
of  Jurassic  of  North  America Bull  29,  pp  15-19 
of  Laramie  of  Utah Bull  34,  pp  20-21 
of  North  America  (nonmarine  fossil ) Ann  3,  pp  424-435 
United  States,  boundaries  of Bull  171,  pp  11-29 
clay  products  of,  at  Paris  Exposition  of  1900 Ann  21,  vi  cont,  pp  391-392 
elevation  of,  average Ann  13,  n,  pp  283-289 
survey  of  northwestern  boundary  of,  1857-1861 Bull  174 
(See  each  State  and  Territory. ) 
United  States  Geological  Survey,  bibliography  and  index  of  publications  of .  .Bull  100 
laws  establishing  and  extending Ann  1,  pp  3-4;  Ann  4,  p  xiii 
relating  to  publications  of . Bull  100,  pp  11-14 
plan  and  organization  of Ann  1,  pp  6-14;  Ann  7,  pp  3-17;  Ann 
8,  i,  pp  3-69;  Ann  10,  i,  pp  3-5;  Ann  11,  i,  pp  3-4;  Ann  12, 
i,  pp  5-7;  Ann  13,  i,  pp  23-25;  Ann  14,  i,  p.  38;  Ann  15, 
pp  29,  66;  Ann  16,  i,  p  13;  Ann  17,  i,  p  17;  Ann  18,  i,  p  18; 
Ann  19,  i,  p  27;  Ann  20,  i,  p  25;  Ann  21,  i,  pp  19-22,  60-61 
Unkar  terrane,  Grand  Canyon  of  Colorado,  pre-Cambrian  rocks  of Ann  14, 
ii,  pp  497-524 
section  of Ann  14,  n,  pp  510-512 
