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SV: pre-metazoan rocks in UK?
The Lewisian complex of the northwestern highlands west of the Moine
thrust are the oldest rocks in the UK. They were originally part of the
northwestern foreland of the Caledonian mountains (=Greenland) that got
stranded on the eastern side when the Atlantic opened. The rocks are
about 1600-2800 Ma old.
They are exposed in the outer Hebrides and on the mainland approximately
from Glenelg to Durness. The mainland part is however partly covered by
younger Torridonian deposits that are about 1000 Ma old, and so
doubtfully pre-metazoan. The "classic" Lewisian localities are e. g.
around Loch Maree and Scourie.
There are a few more areas with exposed Precambrian in the UK, but they
are all rather late Precambrian as far as I know.
Från: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu] För Anthony
Skickat: den 20 juni 2008 08:19
Ämne: pre-metazoan rocks in UK?
I know that Australia has rock formations from before the appearance of
metazoans....does any part of the UK have equally-young rocks within
easy reach of the surface? (or already exposed?)
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