Vol.  49.] 
CLAYS  or  THE  MALTESE  ISLANDS. 
121 
(see  fig.  3).  In  Gozo  the  Clays  invariably  occupy  their  normal  posi¬ 
tion  Detween  beds  4  and  2,  except  at  Chambray,  Dueira,  and  Marsa- 
el-forno,  where  the  complete  denudation  of  the  XJpper  Coralline  Lime¬ 
stone  and  the  Greensands  has  left  the  Clays  exposed  as  the  surface- 
deposit.  Similar  surface-exposures  are  to  be  observed  in  Malta  at 
Karraba  (fig.  3)  and  Melleha.  The  thickness  of  the  Clays  has  been 
variously  estimated.  Both  Hutton 1  and  Adams 2  considered  that 
Tig.  2. — Section  showing  the  effect  of  Gozo  Great  Fault. 
W.N.W. 
Xeuchia. 
Great  Fault. 
E.S.E. 
Migiarro. 
Sea- 
level. 
Big.  3. — Section  from  Ghain  Toffiha  to  Karraba  (Malta). 
E.N.E. 
Ghain  Toffiha. 
W.S.W. 
Karraba. 
[For  explanatory  Index,  see  fig.  1,  p.  120.] 
this  formation  attained  a  maximum  thickness  of  100  feet  and  more, 
while  Dr.  John  Murray  says  that  it  “  probably  rarely  exceeds 
20  feet.”  The  result  of  the  numerous  measurements  that  I  have 
made  of  the  outcrops,  of  the  cliff-sections,  and  of  the  sections  in 
the  well-shafts  in  the  Binjemmas,  proves  that  the  latter  estimate  is 
much  nearer  the  truth  than  the  former.  The  following  table  of 
1  ‘  Sketch  of  the  Physical  Geology  of  Malta,’  Geol.  Mag.  for  1866,  p.  145. 
2  Quart.  Journ.  Geol.  Soc.  vol.  xxxv.  (1879)  p.  519. 
