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From Aug 2006 - Nov 2013 WeDig provided a live forum for diggers & fans of Vindolanda. It has now been mothballed and will be maintained as a live archive.

Here you will find preserved 7 years of conversation, photos, & knowledge about a site many people love. Vindolanda gets under the skin. (Figuratively and literally as a volunteer excavator!) It's a place you remember, filled with people you remember!

Thanks for 7 great years!

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Viewing Single Post From: Mike's Geoblog
Mike McGuire
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True, odd intrusions of the same material as the Whin Sill crop up in various places. For the most part they are sheets, either horizontal(ish) in which case it's called a sill or vertical(ish) in which case it's called a dyke. For example, the geological map shows a whin dyke which is conjectured to run along the S.Tyne Valley in the Bardon Mill / Haydon Bridge area. It's shown as running along the hillside below the house we're renting above Haydon Bridge for this season, but no sign of it can be seen. The map doesn't show anything of this type for the Vindolanda area but this doesn't mean there aren't any.

However, if an intrusion were there it would be below many metres of glacial till (which can currently been seen exposed down to the underlying limestone where the builders have dug out for the new Study Centre). Applying the principle of Occam's Razor, I think it's more likely the pebbles have worked their way to the surface from within the till rather than from below it.

Mike
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Mike's Geoblog · Excavation & General Archaeology Discussions - Open to All!