CATLETT.] 
CEMENT    RESOURCES    OF    VALLEY    OF    VIRGINIA. 
459 
The  following  is  an  analysis  of  a  sample  taken  from  an  almost  verti- 
cal outcrop  which  is  150  feet  wide,  and  which  immediately  adjoins 
the  Trenton  limestones  from  which  sample  3  was  taken.  This  rock, 
and  No.  3  combined,  would  produce  a  normal  mixture.  The  physical 
characters  of  both  are  superior  for  the  purpose. 
Analysis  of  fine-grained  limestone  from  Stanton,  Va. 
[Charles  Catlett,  analyst.] 
Per  cent. 
..   10.28 
Si02 
A1203,  Fe203 4.  36 
CaO 45.  79 
MgO 
Vol  . 
0.79 
58.20 
The  outcrop  is  immediately  on  the  line  of  the  Baltimore  and  Ohio 
Railroad,  and  probably  three-fourths  of  a  mile  from  the  Chesapeake 
and  Ohio.  In  the  vicinity  of  Staunton,  as  at  many  points  in  the  valley, 
there  are  greater  or  less  deposits  of  fresh-water  marl,  which,  in  event 
of  cement  manufacture,  would  undoubtedly  be  utilized.  For  instance, 
the  foundations  of  the  houses  in  certain  portions  of  Staunton  are  cut 
in  solid  marl  10  or  12  feet  deep.  The  irregularity  of  such  deposits, 
however,  does  not  permit  an  estimate  of  quantity  to  be  based  upon 
surface  investigations  alone.  The  Trenton  beds  disappear  a  short 
distance  south  of  Staunton,  and,  while  their  location  is  well  defined, 
when  they  occur  again  they  become  less  satisfactory  in  composition. 
Lexington,  on  the  Lexington  branch  of  the  Chesapeake  and  Ohio 
Railroad,  is  only  about  6  miles  from  the  Norfolk  and  Western  Rail- 
road. There  is  ample  water  here  for  manufacturing  purposes  and 
with  reference  to  fuel  supply  and  shipments  the  locality  is  an  excep- 
tional one.  There  is  developed  at  that  point  very  considerable  deposits 
of  high-grade  soft-grained  limestone  which  is  found  at  a  number  of 
places  near  the  border  of  the  Trenton.  The  limestone  and  the  asso- 
ciated beds,  all  of  which  are  in  large  quantity,  show  the  following 
composition : 
Analysis  of  limestones  and  associated  beds  from  Lexington,  Va. 
[Charles  Catlett,  analyst.] 
Si02 
Al203,FeA- 
CaO 
MgO 
Ignition 
Per  cent. 
0.73 
.79 
53.  71 
.83 
Per  cent. 
9.31 
3.47 
46.30 
.86 
Per  cent. 
11.86 
1.76 
46.64 
.74 
38.32 
Per  cent. 
12.92 
3.88 
45.14 
1.37 
37.20 
Per  cent. 
17.42 
4.70 
42.44 
1.68 
35.62 
Per  cent. 
22.60 
7.06 
36.72 
1.69 
32.52 
It  is  possible  to  make  at  this  point  a  mixture  which  theoretically 
would  yield  a  high-grade  Portland  cement.     It  is  a  question  whether 
