An international seminar on "Cretaceous Geology System,"is being organised by the ONGC at Chennai from January 6-8. Cretaceous systems are rock formations 65 million to 135 million years old. These
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/seminar-cretaceous-geology-systems
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-line-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/geology