88 Geodoumal 7.1/1983

mechanical stabil ity, heavy minerals tend to accumulate mainly in the surf zones of sand beaches. Of economic interest are: ilmenite, rutile, zircon, monazite, and maghetite. The exploi tat ion of these minerals may be profitable when the content is only a few percent. In 1971 and 1973 the Bundesanstalt fLir Geowissenschaften und Rohstoffe investigated the shelf of f the Zambezi delta with R/V V A L D I V I A while in 1980 R/V SONNE investigated the eastern Australian shelf. The Zambezi shelf is covered by stray sand below SO m of water wi th high content in disseminated ilmenite, obviously a product of a Pleistocene barrier ridge. On the E Australian shelf, too, remains of former barrier ridges are proved by seismics. Samp-

les were taken particularly of f the estuaries of sediment-bearing rivers. However, contents of heavy minerals and Of zircon and rutile are low. The trimmed peneplains of these Pleistocene barrier ridges contain an immature, f luviati le heavy-mineral suite. The workshop has been concluded by a panel discussion.

The proceedings including a chapter on the United Nations Law of the Sea Conference by R. Lucas (Bonn), are published by GliJckauf Publishers Ltd., Essen: Marine Mineral Deposits/New Research Results and Economic Prospects, edited by P. Halbach and P. Winter, in the series "Marine Rohstoffe und Meerestechnik", vol 6, Essen, 1982, p 243, 58 , - DM.

Joint IAMAP/IAGA Symposium on Middle Atmo- sphere Sciences (MAS), XVIII Assembly of IUGG, Hamburg, FR Germany, 15--27 August 1 983 Call for Papers

MAS is being jo in t ly organized by the International Association of Meteorology and Atmospheric Physics (IAMAP) and by the Inter- national Association of Geomagnetism and Aeronomy (IAGA). It is cosponsored by SCOSTEP and COSPAR. IAMAP groups involved are the International Commissions on the Meteorology of the Upper Atmosphere (ICMUA, leading), Atmospheric Chemistry and Global Pollution (ICAGCP), Atmospheric Electricity (ICAE), Dynamic Meteorology (ICDM), Ozone (IOC), and Radiation (I RC).

The emphasis of the program wil l be on the dynamics, ener- getics and chemistry of the middle atmosphere (about I0 to 120 km height). Special problems included are the electrodynamics of the middle atmosphere and the physics and chemistry of ions, aerosols and noctilucent clouds. Mutual interactions of the middle atmo- sphere regions and coupling with the troposphere and upper meso- sphere wil l be discussed. Contributed papers on significant observa- tional, theoretical, and experimental results are solicited.

The Middle Atmosphere Sciences Symposium is immediately preceded by a special IUGG Symposium with review papers on the Middle Atmosphere Program. 11 half-day sessions starting on August 20 are planned for the Middle Atmosphere Sciences.

o Modeling of the middle atmosphere, including radiation budget o Coupling between the stratosphere, mesosphere, and thermo-

sphere o Climatology of the middle atmosphere o Gravity waves and turbulence, and parametrization of related

transport in middle atmosphere models o Dynamics, including troposphere coupling o Remote sensing o UV flux, photochemical processes and related chemistry o The electrodynamics of the middle atmosphere o Trace species in the middle atmosphere o Noctilucent clouds o Physics and chemistry of ions and aerosols in the middle atmo-

sphere Deadline for the submission of abstracts is 1 March 1983. The

original should be sent to the Secretary General of IAMAP, Mr. S. Ruttenberg, NCAR, PO Box 3000, Boulder, CO 80307, USA, and a copy to each of the conveners Dr. A. Ebel (IAMAP), Institute for Geophysics and Meteorology, University of Cologne, D-S000 Cologne 41, Federal Republic of Germany, and Dr. P.C. Simon (IAGA), Institute d'A~ronomie Spatiale, 3 Ave. Circulaire, B-1180 Bruxelles, Belgium. Detailed instructions about the abstract format are included in the Second Circular of the IAMAP General Assembly (available from the IAMAP Sectretary General, Mr. S. Ruttenberg) or theThird Circular of the XVI I I IUGG General Assembly (available from the Chairman of the Local Organizing Committee, Dr. W. Zahel, Institut fiJr Meereskunde der Universit~it Hamburg, Heim- huderstrasse 71, D-2000 Hamburg 13, FR Germany.

International Union of Geological Sciences What does IUGS publish?

lUGS publishes a popular quarterly newsmagazine called EPISODES which offers not only the latest information on lUGS projects and programs, but also news items, lists of coming events, new publica- tions and maps, reports and geoscientific articles on topics of global significance or international interest. EPISODES is availab/e to anyone interested in subscribing to i t ; write to: The Edito G EPISODES Secretariat, Room 1 77, 601 Booth St., Ottawa, Canada KIA 0 E8. A new lUGS publication series was launched in 1980 to help iden- tify and give credit to some of the scientific activities carried out under the auspices of lUGS and to make these publications avail-

able at modest prices to as wide an audience as possible. Several volumes have now been published and may be purchased from either the EPISODES Secretariat or the lUGS Secretariat. Some of the proceedings of lUGS symposia and results of lUGS- sponsored work have been printed as lUGS Series A and B publica- t i o n s - volumes published not by lUGS but by various publishing houses and available directly from them. In addition, lUGS participates in the publication of GEOLOGICAL CORRELATION (an annual report on the activities undertaken by the International Geological Correlation Programme) as well as in the publications emanating from the Lithosphere Program. A standing Advisory Board for Publications coordinates the various publications series, examines applications for funds for publications and advises the Executive Commit tee on publication standards and techniques.