Senhora do Salto Fold

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Nuno Correia
Porto, Portugal

Quartzites (Santa Justa Formation) Fold
Valongo Anticline,
The lithostratigraphic succession of the Valongo Anticline spans the Cambrian to Carboniferous. Concerning the Ordovician component, distinguished three formations: the Santa Justa Formation (Lower Ordovician),
Valongo Formation (Middle Ordovician), and Sobrido Formation (Upper Ordovician). An early succession of supposed Tremadocian age, underlying basal quartzites of the Santa Justa Formation.

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