372  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,   L906,  PART    1. 
beds  have  a  low  dip  to  the  west  and  in  a  generalized  section  are 
stratified  as  follows* 
Generalized  section  near  Holland,  Ohio. 
Feet. 
1.  Glacial  drift ,  clay,  pebbles,  and  bowlders 0-  5 
2.  Dolomite,  dense  fine-grained,  in  thin  \nn\* 10± 
.'!.  Sandstone,  grayish-white,  friable,  of  fine,  rounded  grains 15± 
4.  Dolomite,  very  hard,  siliceous 2 
5.  Sandstone,    similar   to    No.    3,    bottom    not    visible,    reported 
thickness 60 
At  the  time  of  visit  mills  and  quarries  were  closed  for  the  winter 
and  the  old  sandstone  pit  was  filled  with  water.  The  sand  appears 
to  be  of.  good  grade,  and  as  the  quarries  are  connected  with  the  Lake 
Shore  and  Michigan  Southern  main  line  by  a  well-constructed  spur 
it  is  probable  that  the  production  of  glass  sand  will  at  some  time  be 
resumed. 
Toboso. — The  E.  II.  Everett  Company  operates  a  large  quarry  one- 
half  mile  west  of  Toboso,  a  station  on  the  Baltimore  and  Ohio  Rail- 
road, about  15  miles  east  of  Newark.  The  quarry  is  in  sandstone 
and  conglomerate  beds  that  outcrop  in  hind's  about  60  feet  high  on 
the  right  bank  of  Muskingum  River.  About  30  feet  of  sandstone 
are  now  worked  after  stripping  the  top  5  to  20  feet,  which  are  of  thin- 
bedded  and  shaly  sandstone.  The  quarry  can  he  worked  probably 
to  river  level,  about  15  feet  lower,  since  the  rock  contains  very  little 
water  to  that  depth.  The  fresh  quarry  face  presents  on  the  whole 
the  appearance  of  a  uniformly  yellowish-brown  sandstone.  The 
rock  is  massive,  cross-bedded,  rather  coarse-grained,  and  contains 
many  layers  of  fine  to  coarse  quartz  pebbles.  Some  of  these  pebbles 
attain  a  diameter  of  three-fourths  inch.  A  few  streaks  of  white 
sandstone  occur,  composed  of  clear  quartz  and  white,  opaque  quartz 
grains  with  a  sprinkling  of  fine  black  specks,  mainly  of  tourmaline 
and  hornblende.  Rarely  there  are  seams,  2  to  4  inches  thick,  of 
siliceous  iron  ore  and  a  few  thin  clay  seams.  The  sand  is  drilled 
by  steam,  shot  down,  and  loaded  into  skips,  which  travel  on  trucks 
to  the  middle  of  the  quarry,  where  the  skips  are  picked  up  by  cable 
conveyer  and  carried  to  the  mill.  This  cahleway  is  about  900 feet 
long  and  well  illustrates  the  efficiency  of  this  method  of  handling  sand. 
The  sandstone  is  reduced  first  by  a  jaw  crusher,  next  by  a  16-ham- 
mer  Williams  mill,  is  next  screened,  and  then  ground  in  a  wet  grinder, 
or  vat,  in  which  two  heavy  iron  rollers  or  "chasers"  revolve  at  the 
ends  of  an  axle.  Washing  is  accomplished  by  two  sets  of  "  augers," 
each  set  consisting  of  two  screws  10  feet  in  length,  which  carry  the 
sand  up  inclined  troughs  against  a  flow  of  water.  Water  for  wash- 
ing is  obtained  from  Muskingum  River,  which  at  times  is  very  muddy, 
and  it  would  seem  preferable  if  clear  water  could  be  used.     Possibly 
