ONGC Bulletin, Volume 43, No. 1, June 2008: Stratigraphy of India (Special Issue)

The word Stratigraphy derived from Latin stratum and the Greek graphia is literally the description of Strata. Stratigraphy remained a descriptive science for nearly one and half centuries. But as conceived now stratigraphy is a dynamic subject. The time concept in stratigraphy established on the basis of lithology, biota, radiogenic-isotope, geochronology, geomagnetic polarity time scale, chemostratigraphy, Earth's orbital parameters and cycle stratigraphy is a fundamental to understanding the dynamic evolution of Planet Earth. The author have made an effort to pigeonhole almost all formations of Proterozoic and Phanerozoic of India within the time frame of Geological Time Scale 2004.