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71 lines
3.0 KiB
HTML
Executable File
71 lines
3.0 KiB
HTML
Executable File
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN">
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<meta http-equiv="Content-Type" content="text/html; charset=utf8" />
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<title>1987: Cambridge Underground report</title>
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<link rel="stylesheet" type="text/css" href="../../css/main2.css" />
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</head>
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<body>
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<h1 align=center>1991 Expo</h1>
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<center><font size=-1>Cambridge Underground 1988 p 7</font>
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<h2>Extensions to 113, "Sonnenstrahlhöhle"</h2>
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<p><b>Mike Richardson</b></center>
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<p>Entrance 113 had been extensively explored by previous expeditions to a
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depth of about 450m. The surveyed route led across the head of a steep
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descent to "Ibbeth Perilous" pitch. This had not been descended since 1980
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when a caver (see <a href="report.htm#helmet">elsewhere</a> in this journal)
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lost his helmet and light down it. In 1987, in the course of looking for
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extensions across the tops of a number of ramps near the entrance, a descent
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was made to the head of this pitch (although at the time it was not certain
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that this was Ibbeth Perilous).
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<p>A little way into the passage at the bottom of the entrance shaft, two
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parallel steep ramps descend for about 15m. The ramps have been free-climbed,
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however, an uncontrolled descent by Andy Farrow indicates that a rope is very
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desirable. The second ramp is blocked at the bottom, but a small hole gives
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access back to the bottom of the first. From here a short climb leads to a
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jammed boulder above the first proper pitch.
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<p>The shaft descends in a series of steps for a further 20m. These are
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free-climbable with difficulty. A 13m drop then lands on an ice-rock
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blockage, which previously contained the helmet and light, now recovered and
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presented to their owner. This point has been named "Marathon Ledge" after
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Becka regurgitated a partially digested Marathon Bar over Chris from halfway
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up the pitch above.
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<p>The blockage was hammered out by a caver attached to a rope, after which
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two short drops led to a 6m pitch to a large chamber. This proved to be in
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the "Opera House" are of the original route.
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<p>The earlier survey suffered from a compass of questionable calibration,
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due to an encounter with a fridge (see <a href="../1983/41svy.htm">Cambridge
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Underground 1984</a>). The survey of the new extension has now allowed the
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orientation of the cave to be determined with greater accuracy. This is
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important, since entrance 152 enters the cave lower down (below the "Purple
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Pit"), and the entrance is only some 50m from an entrance into the
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Larchenhöhle system discovered by German and French cavers in 1987. A
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connection between 113-153 and the German-French entrance would add a
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significant amount of length to the combined system.
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<hr />
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<ul>
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<li><a href="../../1623/113.htm">Sonnenstrahlhöhle</a>
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Guidebook page</li>
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<li><a href="log.htm">Logbook</a></li>
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<li><a href="report.htm">Expedition description</a></li>
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<li><a href="158gd.htm">Donner-und-Blitzen Höhle</a>, Mike Richardson</li>
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</li>
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<li><a href="geolog.htm">Geology of the Totengebirge</a>, Jared West<br>
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<!-- <li><a href="bcracc.htm">BCRA Caves & Caving Report</a><br> -->
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</ul>
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<hr />
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</body>
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</html>
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