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Hallowe'en Rift, Mendip Hills

Excursions [and other notes] involved in the exploration of Hallowe'en Rift; a cave, so far, formed within Triassic Dolomitic Conglomerate.

The exploration of Hallowe'en Rift was started in 1982 by Trevor Hughes with other members of the Bristol Exploration Club, then during the early 1990's Vince Simmonds and other, mostly, local diggers were active at a number of locations within the cave, including the start of the dig to the 'east' side of the entrance, leading to An Unexpected Development in August 2018, with Graham Johnson in December 1991. The current phase of exploration was commenced in 2009, with the majority of the early work being carried out by Vince Simmonds and Alex Gee, now the regular team also includes Rob 'Tav' Taviner, Graham 'Jake' Johnson, Nick Hawkes, Jonathon Riley, Paul 'Brockers' Brock, Roz Simmonds, Duncan Price, Mike Moxon and Matt Tuck. There has been occasional help from others including Caroline Allen, Mike Willett, John 'Tangent' Williams, Pete Bolt, Bob Smith, Callum and Hazel Simmonds, and several appearances by that well-known antipodean, Ray Deasey.

There have been visits from some notable experts in their various fields including: Charlie Self, Andy Farrant, Christopher Smith, Derek Ford, Joyce Lundberg, Don MacFarlane, Marc Luetscher and Gina Moseley. All have added to a better understanding of Hallowe'en Rift.

Uranium-series dates

notes Posted on Sun, January 27, 2019 12:00:10

Thanks to Gina Moseley we have some more dates on speleothems sampled from Hallowe’en Rift.

230TH Age (yr BP) Corrected

HR1-T 215,221 +/- 2476
HR1-B 219,378 +/- 2429 correlates with MIS7
HR2-T 125,341 +/- 1532
HR2-B 126,834 +/- 2197 correlates with MIS5e

BP stands for “Before Present” where the “Present” is defined as the year AD 1950.

26th January 2019

digging 2019 Posted on Sun, January 27, 2019 06:58:10

With Brockers,
Jonathon, Nick and Tav

After the lurgy
and a week at the University of Sheffield Zooarchaeology Lab, it was good to
get back into Hallowe’en Rift for my first digging session of 2019.

The plan this
session was to continue the enlargement of the passage along to Trevor’s Old
Dig, trending circa north-west. There had been some mention of a ‘pinch-point’
so this is where some of the effort was directed. Nick set-off to the end so
that he could free an old bang wire that was impeding the skip hauling.
Meanwhile, I started to remove some of the loose material that had been stashed
to the sides of the passage just beyond the pinch-point to make more room. Nick
returned and asked that I pull the old wire through, that done, Nick started to
enlarge the passage about 6m beyond me, his plan was to see if could remove
layers of calcite from the floor and so. Enlarge the passage. He did wonder
whether, or not, he was digging a pond, I guess we’ll find out next session. Filled
bags and rocks were being removed at a steady rate to Tav, positioned at the
junction, who re-directed the skip to Brockers, at the bottom of the entrance. To
keep himself occupied in between loads, Brockers had decided to do some ‘tidying’,
keeping Jon, on the surface, busy. There was an occasional grumble from above
ground, ‘Nick bag’, too heavy, too claggy, very difficult to empty, below
ground, the comments passed by.

Today’s count: 76
loads, 54 filled and emptied bags and 22 skip-loads of rock. It had been
another productive session and I, for one, enjoyed it!