• Descent 305 - Pre-order is open!!

    Our August/September issue has a publication date of 2 August, and it is a special summer bumper issue full of stories of exploration and wonder from the underground world.

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Rowter Hole Update

So, what's with the bubbles? Where are they coming from?
To reduce the silt levels in the sump before we attack it again we have the stream piped right to the base of it (we attached the end of a pipe there when it was drained). It's drawing some air down with it, causing the bubbles.
 
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