Reniform and stalactitic masses with a radiated fibrous structure also occur.
Great masses of granite, syenite and diorite were intruded at this period, and send tongues even into the andesitic tuffs.
These minor ranges, excepting the Zenta, are separated from the Andean masses by comparatively low depressions and are usually described as distinct ranges; topographically, however, they seem to form a continuation of the ranges running southward from the Santa Victoria and forming the eastern rampart of the great central plateau of which the Puna de Atacama covers a large part.
These elevated masses are divided from one another by similar great depressions.
The historical figures at the head of armies, who formerly reflected the movement of the masses by ordering wars, campaigns, and battles, now reflected the restless movement by political and diplomatic combinations, laws, and treaties.