They are also preserved in basins on the western plateau, as shown by brown coal deposits passed through in the Lake Phillipson bore.
In this valley were laid down, either in Eocene or Oligocene times, a great series of lake beds and thick accumulations of brown coal.
types, may be distinguished, and these, with the two extremes of brown coal or lignite and anthracite, form a perfectly continuous series.
Germany, and containing brown coal and amber, has been met with only in Poland, Courland and Lithuania.
In the Tertiary region are found small quantities of iron ore and an indifferent brown coal.