Thanks, Michael. And the exposed rocks show strata that is often completely
misaligned, almost higgledy-piggledy :-)
Chris
On 10 Nov 2011, at 13:41, Michael Hobart wrote:
> The oldest exposed rocks in the Madeira archipelago are about 5.2 Million
> years old, the most recent eruptions in the archipelago are about 6,500 years
> old.
>
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