Portugal - Atlas do Ambiente I.13 - Carta Litológica

Summary

The aim is to provide an overview of the lithology of Portugal by describing thirty-four lithological complexes represented on the Map. The first twenty-six complexes include sedimentary and metamorphic rocks, and the last eight comprise igneous rocks. The predominant formations are listed first: 1 — Alluvium. 2 — Dunes and aeolian sands. 3 — Slope deposits, surficial sands, and terrace sands. 4 — Sands and gravels. 5 — Glacial deposits. 6 — Calcareous tuffs. 7 — Sands, rounded pebbles, poorly consolidated sandstones, clays. 8 — Sandstones, more or less marly limestones, sands, gravels, clays. 9 — Plateau gravels, Beira Baixa arkoses, coarse to conglomeratic and fine-grained sandstones, limestones. 10 — Conglomerates, sandstones, white limestones, reddish marls. 11 — Sandstones and arkosic sandstones. 12 — Sandstones, conglomerates, limestones, dolomitic limestones, marly limestones, marls. 13 — Conglomerates, sandstones, limestones, dolomitic limestones, marly limestones, marls. 14 — Limestones, dolomitic limestones, marly limestones, marls. 15 — Red sandstones (Silves Sandstone), conglomerates, marls (sometimes saline or gypsiferous), generally dolomitic limestones. 16 — Conglomerates, carbonaceous schists, argillaceous schists. 17 — Argillaceous schists, greywackes, sandstones. 18 — Metavolcanic rocks: a — acidic (porphyroid schists); b — basic and intermediate (greenschists, diabases). 19 — Carbonate rocks. 20 — Schis