Presented is a review of papers presented at the 25th International Geological Congress held August 16-25, 1976, Sydney, Australia. Topics include precambrian geology, tectonics, biostratigraphy, geochemistry, quaternary geology, engineering geology, planetology, geological education, and stress environments. (SL)

Presented is a review of the activities, council meetings, open sessions, and field excursions offered at the 25th International Geological Congress held August 16-25, 1976, Sydney, Australia. (SL)

Reviews recent developments in clastic sedimentology, including reports of meetings and symposia. Identifies a resurgence of interest in the diagenesis of terrigenous sediments. (MA)

Presented is a review of the decision of the International Union of Geological Sciences to cancel the membership of the Republic of China (Taiwan) and to admit the People's Republic of China. (SL)

Condenses the current research in exploration for gas and oil as described at a symposium at Case Western Reserve University. Briefly discusses reserves, oil exploration and extraction techniques. (BR)

Describes a report prepared for the Federal Energy Administration by a group of petroleum geologists. The study reports mean estimates of 82 billion barrels of crude oil and 484 trillion cubic feet of natural gas in the United States, including both onshore and offshore resources. (MLH)

Explains the way in which oil and gas reserves are estimated, and the variation in these estimates according to the year of the resources' estimation and the group undertaking the survey. A recent Federal Energy Administration study suggests that recoverable oil and gas resources have limits that may be approached in the next 50 years. (MLH)