Extremero Expedition, 1991
Total Area Survey
During the expedition, a number of surface surveys were carried
out in order to calculate the precise locations of the caves explored.
These were added to previous years' surface surveys and cave surveys
to give an overall area survey, as shown on the next page. Various
things can be learnt from this:
- 53/5 seems to be heading to the Xitu system. The bottom of
the cave is only 600 m away from The Mendip Bit in 12/5 and 190
m higher. However, it is just possible that if the source of the
draught in the entrance series is found, then this may lead elsewhere.
- Skull cave is located directly above the London Underground
and so, if it does, is likely to provide a quicker, although harder,
entrance to the Jultayu master cave.
- 66/5 is located roughly halfway between 12/5 and 2/7. However,
2/7 is the much larger system, and so 66/5 is most likely to join
this system; it is currently 250 m away from Postman Pat and Paddington
choke, and 300 m higher. Alternatively, the cave may join another,
as yet unknown, system between the Jultayu and Xitu systems.