Yol.  49.] 
THE  BAJOCIAN  OF  THE  SHERBORNE  DISTRICT. 
479 
37.  The  Bajocian  of  the  Sherborne  District  :  its  Relation  to 
Subjacent  and  Superjacent  Strata.  By  S.  S.  Buckman,  Esq., 
F.G.S.  (Read  June  7th,  1893.) 
Contents. 
Page 
Introduction  .  479 
I.  Section  at  Stoford,  Somerset  .  484 
II.  „  Bradford  Abbas,  Dorset  .  485 
III.  ,,  „  (near  Vicarage),  Dorset  .  486 
IV.  ,,  Halfway  House,  Dorset .  486 
V.  „  „  (in  field),  Dorset  . . .  487 
VI.  „  Louse  Hill,  Dorset  . 488 
VII.  „  Marston  Road,  Dorset  .  490 
VIII.  „  Holway  Hill,  Dorset  .  491 
IX.  „  Sandford  Lane,  Dorset  .  492 
X.  ,,  Combe  (Limekiln  Quarry),  Dorset  .  496 
XI.  „  Redhole  Lane,  Dorset .  496 
XII.  „  Clatcombe  (disused  quarry),  Dorset  .  496 
XIII.  „  „  (Farmhouse),  Dorset .  497 
XIV.  „  ,,  (on  Farm),  Dorset .  498 
XV.  „  Frogden,  Dorset  .  500 
XVI.  „  Oborne  Village,  Dorset  .  502 
XVII.  „  Milborne  Wick,  Somerset  .  502 
XVIII.  „  Dundry,  Somerset  . 508 
XIX.  ,,  Leckhampton  Hill,  Gloucestershire  .  511 
Correlation  of  the  Strata  .  507 
Conclusion  .  518 
Summary .  520 
Table  I.  Analysis  of  Sections  .  506 
Table  II.  Stratigraphical  Diagram  . . .  facing  508 
Table  III.  Correlation  of  the  Strata .  facing  514 
Table  IV.  Correlation  of  the  Zones  and  Hemerae  .  519 
Introduction. 
Definition  of  the  Term  4  Bajocian .’ — For  the  strata  which  are 
equivalent  to  the  upper  part  of  the  Inferior  Oolite,  with  a  portion 
of  the  Fullers’  Earth,  d’Orbigny  proposed  the  term  4  Bajocien.’ 
Like  our  own  terms  4  Inferior  Oolite  ’  and  4  Fullers’  Earth,’  its 
boundaries  were  .somewhat  uncertain;  and  like  them,  too,  it  would 
seem  that  the  same  palaeontological  horizon  has  received  different 
geological  names  at  different  localities — for  this,  probably,  a  difference 
in  lithological  characters  may  be  blamed.  In  the  present  paper  I 
use  the  term  4  Bajocian  ’  in  a  merely  conventional  sense — for  the 
lower  beds  of  the  upper  part  of  the  4  Inferior  Oolite  ’ ;  but  I  do  not 
express  any  opinion  as  to  its  merits.  I  may,  however,  remark  that 
the  division  of  the  Jurassic  period  on  palaeontological  grounds — 
disregarding  the  details  of  its  inconstant  and  merely  local  lithology 
— is  a  necessity.  Ammonites  have  been  chosen  as  the  indicators  of 
Q.  J.  G.  S.  Ho.  1960  2  e"  - 
