Chapter III: Geology and Mines

Peculiar interest of Spanish geology 58
Granite and Silurian rocks _ib._
Carboniferous formation 59
Secondary formations _ib._
Upper Cretaceous _ib._
Eocene tertiary 60
Miocene fresh-water _ib._
Pliocene _ib._
Influence of geology on populations _ib._
Statistics of Spanish geology 61
Volcanoes, recent _ib._

_Minerals of_:
Gneiss and crystalline schists 62
Metamorphic rocks _ib._
Cambrian formation _ib._
Silurian slates _ib._
Devonian sandstones _ib._
Carboniferous series _ib._
Permian 63
Triassic conglomerates _ib._
Jurassic limestones and marl _ib._
Cretaceous formation _ib._
Eocene, Miocene, and Pliocene _ib._
Production and export of six chief minerals _ib._
Of argentiferous ore, cobalt, silver _ib._
Coal 65
Iron of the Bilbao district _ib._
Locality of principal mines 66
Mining laws 67