Contents of Episodes Vol. 25 No.4, December 2002

Presidential Perspective
From the Chair
by Eduardo F. J. de Mulder

Articles
Tectonics of petroliferous basins in the continent of China
by Ren Jishun and Xiao Liwei

Occurrence of trona in alkaline soils of the Indo-Gangetic Plains of
Uttar Pradesh (U.P.), India
by Saugata Datta, Yves Thibault, W.S. Fyfe, M. A. Powell, B.R. Hart,
R. R. Martin, and S. Tripthy

New methods for the delineation of geological barrier rocks for waste
disposal sites in northern Thailand
by Matthias Dorn and Worawoot Tantiwanit

Giovanni Capellini and the origin of the International Geological
Congress
by Gian Battista Vai

A brief review on the accomplishments of the IUGS Commission on
Global Sedimentary Geology (C-GSG)
by Aymon Baud

Classic Paper
John Joly's paper: "Uranium and Geology" (1908)

Forum
Quaternary chronostratigraphy and the establishment of related standards

Geological Map
Geothermal Map of California (1:1,500,000)

Conference Reports
The Fourth Workshop of IGCP-420 Continental Growth in the Phanerozoic:
evidence from Central Asia

First Workshop of IGCP 463: Upper Cretaceous Oceanic Red Beds

Geoenvironmental Hazards and Disasters in Africa

16th International Sedimentological Congress

GEOCHIM 2002/UNESCO—Postgraduate certificated training course in
geochemical exploration methods and their environmental applications

News Reports
New data for an Eemian lacustrine phase in southern Jordan
The Geological Society of China celebrates its 80th anniversary of founding
How can the mining industry contribute to sustainability

Book Reviews
Natural hazards and environmental change
One man’s search for the age of the Earth
Groundwater science
Rocks for crops: agrominerals of sub-Saharan Africa

Profiles
IUGS/IAGC Working Group on Global Geochemical Baselines
The International Association of Hydrogeologists

New Publications

Calendar