The discovery of “deep time” is one of geology’s greatest contributions to human understanding. The conceptual foundations laid by eighteenth- and nineteenth-century geologists working in relatively small geographic areas paved the way for development of the modern high-resolution geological timescale (figure 1.1), which spans 4.6 billion years of Earth history and applies to geological features anywhere on Earth.

In some ways light is an enigma. We know that it is a form of energy that is transmitted from one place to another at finite velocity and that it can be detected with the eye. In many ways it behaves as though it were composed of numerous tiny particles that travel bullet-like from one point to another. But it also behaves as though it were a wave phenomena in which the energy moves somewhat like the waves started by dropping a pebble in a pond. Because light behaves in these two seemingly contradictory ways, two different theories, the particle theory and the wave theory, have been developed to explain it. <...>

Геология, петрология и геохронология
Строение Индийского щита и обрамляющих его структур по комплексу геологогеофизических данных
Стратиграфия и геохронология докембрия Украинского щита
Геология и геохронология восточной части Балтийского щита
Древнейшие анортозиты Земли
Сравнительная характеристика тектонических комплексов докембрия Сибирской и Индостанской платформ
Докембрийские разломы Алданского щита