Thanks Tanc!

Thanks to @chrisdclark.bsky.social, @jeremyely.bsky.social, Les Knight, Sarah Bradley and Adam Igneczi their collaboration with this. Les in particular has tirelessly been tromping around the country looking for erratics for years at this point!

We found the 2022 BRITICE model was able to recreate 77% of erratics, notably failing to recreate any of the Galway Granite erratics in Ireland with modelled erratics flowing to the west.

We developed a simple method of modelling erratic dispersal which prioritised the direction of ice flow over the entrainment and deposition of erratics. We used this to ask the simple question: Could the modelled ice sheet have recreated the observed erratic dispersal?

We looked at modelled ice flow from the last British and Irish Ice Sheet between 31 and 15 ka BP and compared this against observations of 1883 glacially transported boulders (erratics) from three geologically distinct source areas across England, Scotland and Ireland.

Too many for a quick count, but I wouldn’t be surprised if we had close to 100, but at least 50