At all events, two quite distinct views seem to underlie the opening books of the Old Testament.
Others maintain that at any rate two sources underlie Acts i.-xii., or even i.-xv.
In the river-beds, however, and at some distance from the sea, older strata and eruptive rocks underlie the alluvium.
Along the coastal margins they underlie the newer formations and appear in the deep valleys and kloofs wherever denudation has laid them bare.
Lower Cainozoic lacustrine beds with fossil plants, of the same age as those which underlie the older basalts of Victoria, occur in the valleys of northern Tasmania.