ckidue,]  CEMENT    KESOURCES    OF    NORTHEAST    MISSISSIPPI. 
Analyses  of  lignite,  Dekalb,  Miss. 
513 
Fixed  carbon  . . 
Volatile  matter 
Ash 
Moisture 
Sulphur 
Specific  gravity 
1. 
•> 
41.88 
40.80 
46.82 
41.48 
7.94 
17.64 
2.  13 
n.  (1. 
1.28 
1.57 
n.d. 
1.33 
The  lignite  is  overlain  by  a  bed  of  gray  clay,  and  this  by  strati- 
fied red,  yellow,  and  white  sands,  containing  occasional  bands  of 
ferruginous  sandstone.  The  Lafayette  formation  lies  on  these  hills, 
reaching  in  places  a  thickness  of  20  feet,  and  in  this  there  is  con- 
siderable sandstone. 
Two  and  one-half  miles  east  of  Scooba,  on  the  west  bank  of  the 
creek,  is  the  first  outcrop  of  Selma  chalk  on  the  Scooba  and  Gaines- 
ville road.  A  sample  of  limestone  taken  from  this  outcrop  was  ana- 
lyzed by  W.  S.  McNeil,  in  the  laboratory  of  the  United  States  Geolog- 
ical Survey,  with  the  following  result : 
Analysis  of  Selma  limestone  near  Scooba,  Miss. 
Silica  (Si02)  16.48 
Alumina    (AL03)   1    6  9J 
Iron  oxide   (Fe2Os)   J 
Lime  carbonate  (CaC03)   74.34 
Magnesium  carbonate   (MgCOp)    .  <*>7 
Water   .67 
Two  miles  east  of  Scooba  and  one-half  mile  south  is  another  out- 
crop of  limestone  more  sandy  than  that  2^  miles  east  of  Scooba. 
This  is  perhaps  of  Ripley  age. 
Between  Portersville  and  Oak  Grove,  in  southern  Kemper  County, 
on  the  west  side  of  Pitticfaw  Creek,  the  Lagrange  Hills  begin  and 
extend  westward.  On  the  land  belonging  to  Mr.  M.  L.  Nailer  a  bed  of 
lignite  has  been  opened  up  and  is  reported  to  be  4  feet  thick. 
Sucarnooche  Creek  marks  the  west  edge  of  the  Midway  group,  from 
2^  miles  due  east  of  Dekalb  to  about  3  miles  north  of  Oak  Grove. 
Here  the  Porters  Creek  area  widens  and  its  west  edge  swings  in  to 
within  2^  or  3  miles  east  of  Oak  Grove,  then  follows  a  southeasterly 
direction  and  crosses  the  Kemper  and  Lauderdale  county  line  about 
3^  miles  west  of  the  State  line. 
On  the  west  side  of  Quilby  Creek,  where  it  runs  southward  along 
the  State  line,  7  miles  east  of  Sucarnooche,  the  Selma  chalk  forms 
a  small  bluff.  The  prairie  soil  extends  back  for  2  miles  farther  west. 
Bull.  260—05  m 33 
