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the claim

London's Tube tunnels were mostly bored through London Clay, a stable layer that supports tunnelling beneath the city.

the verdict
INSUFFICIENT LEANING
Recorded sources
4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that London's Tube tunnels were mostly bored through London Clay, a stable layer that supports tunnelling beneath the city?

Unclear. The retrieved items confirm that London Clay is a stiff, well-studied stratum in which tunnels have been excavated across the London Basin, and that deep-level Tube railways exist. None of them states that the Tube tunnels were mostly bored through London Clay or that the layer's stability is what supports tunnelling beneath the city.

Verdict: PARTIAL LEAN · 4 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 4
Further Studies of the Properties of London Clay
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Further Studies of the Properties of London Clay. (n.d.). cir.nii.ac.jp. https://doi.org/10.1680/geot.1959.9.2.33

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More for · 3
Sample disturbance in London Clay
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Sample disturbance in London Clay. (n.d.). cir.nii.ac.jp. https://doi.org/10.1680/geot.1992.42.4.577

The Effects of Varying Centerline Tube Sampling Disturbance on the Behavior of Reconstituted Clay
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The Effects of Varying Centerline Tube Sampling Disturbance on the Behavior of Reconstituted Clay. (n.d.). cir.nii.ac.jp. https://doi.org/10.1520/gtj11115j

WATERLOO AND CITY RAILWAY
2004
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WATERLOO AND CITY RAILWAY. (2004). portal.ariadne-infrastructure.eu. https://portal.ariadne-infrastructure.eu/resource/ea3c5d833bb66540fe1319bf31bd2972af1c28c7c5d9f2ad9436650b82a68b44

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