In
Pays Nantais, there are 3 main soil types: sandy soils, soils from acid
rock rich in potassic minerals, and soils from basic rock rich is
ferromagnesian minerals. The sedimentary rock is made up of armoricain
sandstone and schist, magmatic granite or gabbros rocks, and metamorphic
gneiss, micaschist, amphibolite or serpentinite rocks.
In
Anjou, the sub-soil is mainly composed of argillaceous slate, sandy
shale and carboniferous schist from the Armorican Massif. Eruptive seams
of spilite, rhyolite and phtanite are also found here.
In Touraine, the sub-soil is composed of chalk limestone from the Paris Basin with clay-limestone and flinty clay soils; the terraces of the banks of the Loire and the Vienne are made of sand and gravel. The banks of the Cher are often made of flinty clay soils.
In Touraine, the sub-soil is composed of chalk limestone from the Paris Basin with clay-limestone and flinty clay soils; the terraces of the banks of the Loire and the Vienne are made of sand and gravel. The banks of the Cher are often made of flinty clay soils.
(from vinvaldeloire.com)
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