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Ligne 34 :
One wall of the rift is crossed by six shallow half-metre wide half-tubes plunging outwards at about 15°.
One end of the rift, and the half-tubes, is exposed in a steep cliff, though the other end is inaccessible.
The half-tubes are crossed by recent wandkarren, and they are clearly a very old feature, probably developed within the phreatic zone before development of the present topography (WALTHAM, A. C. 1971d: 44-45)}}
== Rigging sheets ==
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