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The typical Gföhler gneiss is
a migmatitic or thogneiss, a
metamorphic rock that is formed
when granite is subjected to
extreme conditions of pressure
and temperature. The granite
itself was formed thanks to a
gradual cooling of acidic molten
stone some 480 million years in
the past.
Over the course of the Variscian
ontogeny, 350 million years
ago, the stone was transformed
into so-called migmatitic
granite gneiss. The migmatitic
amphibolite in the lower vineyard
parcels is a metamorphic rock
as well, one which underwent a
par tial melting. The name refers
to the high concentration of the
alkaline mineral hornblende, the
most frequently encountered
representative of the amphibolite
group.