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logbook_2019 [14 Mar 2019 00:30] – [Logbook] Far Rift Dig update to 11/2/2018 cookie
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 +====== Log Book 2019 ======
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 +==== Far Rift Dig. Update to 11 Feb 2019 ====
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 +Through usage a few names for discoveries have stuck, the existing rift (with the knotted rope) at the end of the original dig with water in is now "Referendum Rift". The start of the tight bedding plane is "The Portcullis" making the breakthrough bedding plane "Portcullis Passage". The well decorated tube is "Pretty Passage". The new rift is "Backstop Rift" none of these names are official yet but are what the diggers are using at the moment.
 +
 +So four possible ways on have been identified, the end of Backstop rift, the top of Backstop rift, Pretty Passage and a small hole across the bedding plane. I will deal with each in turn.
 +
 +End of Backstop Rift\\
 +This has been pushed to its conclusion and other than a very small hole (2 inches diameter) in the roof, nothing. The floor has been probed to a depth of about 2 feet revealing that the walls of the rift continue straight down at least that far. No evidence of bats.
 +
 +Top of Backstop Rift\\
 +Andy has bolted to the very top where an intriguing tube about 8 inches diameter was discovered, seemingly breaking into another rift. The next trip saw Andy doing some incredible gymnastics to drill ready for blasting. We retreated to Referendum Rift and pushed the button, it was somewhat louder than we expected leading to theories of cross rifts and passages heading back over Referendum Rift. The next week Backstop was climbed to the blast site and a small bedding passage was discovered heading East, sadly it is only about 6 inches across but goes for at least 2m where it disappears around a bend. No evidence of bat droppings.
 +
 +Pretty Passage\\
 +This was pushed in just a fluffy to keep it clean, amazingly no formations where damaged. After about 6 foot everything closes down with 4 or 5 holes between the mud floor and stone roof, all of them about 3 or 4 inches high. Lots of bat droppings all over the place. As this seems to be trending west and south (back towards known cave) it is being left for the moment as it will be a big dig rather than a quick breakthrough.
 +
 +Small hole across bedding plane\\
 +Looking north across the bedding plane is a hole about 8 inches across, sadly the bedding plane is only about 5 inches high just before it. Richard Nurse brought an endoscope along and although not conclusive it does seem that the hole trends east. This will need blasting when Andy returns from the Alps. There are plenty of bat droppings here. To keep us busy we are currently digging along the bedding plane, it has revealed itself as an ellipse about 12 inches high in the middle with nice scallops in the ceiling and heading east. Much excitement 2 weeks ago when the roof went vertical and a small airspace was encountered. The horizontal bedding plane seems to have encountered a cross rift about 10 inches across, who knows how high and heading northish. There is a possibility that this rift intersects both the "small hole across the bedding plane" and the "small bedding passage" at the top of Backstop Rift.
 +
 +So all quite complex and needless to say frustrating as we know there is open passage somewhere but we still don't know where the bats are coming from!
 +
 +-- Lawrence 11/2/19