No draught, but then again there was no draught once we'd broken the sump - just an echo. Probably just a fragment of old passage with no open connection to the surface or other caves.
Taping still in progress. Please continue to stay away until we have finished.
No draught, but then again there was no draught once we'd broken the sump - just an echo. Probably just a fragment of old passage with no open connection to the surface or other caves..
No more mud sumps (well never say never). The small invading stream which created them has now left the old phreatic route. It comes out of the roof of the Echo Chamber. Beyond, the main routes seem to be sealed with big flows of calcite. The best lead, and the one which will do least damage is been dug, but it is a small hole.
We've finished our work in Echo Chamber now with a photo trip. Anyone visiting will need to be very careful of the long straws, some of which are very close to the tape. Look out for a full write up in a future Descent magazine.
We have been wondering what the white powdery deposit is as seen lower right of centre in this picture. It lies on mud and looks like damp drill dust.