OLR (1983) 30 (12) F. General 945

provides a comparatively simple, but still not completely understood, example of unstable flow. In the turbulent regime, the Couette flow has some important characteristics of a strange attractor with a dimension of 2~,, in accord with chaos models. (if P)

83:6907 Turner, Grenville, 1983. Rare gas isotopes and the

evolution of the Earth's mantle. (Report.) Nature, Lond., 303(5920):752-753.

Combining isotope data for helium and the heavy rare gases with 'radiogenic-primordial pairs of helium, argon, and xenon' and previously deter- mined strontium values supports the concept of a layered mantle. The role of isotope ratios in investigating mantle convection and mixing is discussed. Indications are that 'the material that suffered a major outgassing 4500 mya...[is] also the source region of depleted MORB.' Dept. of Phys., Univ. of Sheffield, $3 7RH, UK. (bas)

F390. Educational literature

83:6908 Adelman, W.J. Jr., 1983. Trends in neurobiology

using marine models. Researchers at the Marine Biological Laboratory in Woods Hole are study- ing nerve cells of squid, lobsters and seaworms for clues to human nerve and muscle disorders. Oceanus, 26(2):46-54. MBL, Woods Hole, Mass. 02543, USA.

83:6909 Courtillot, Vincent and G.E. Vink, 1983. How

continents break up. Scient. Am., 249(1):42-49.

Continents rift apart over millions of years, and in the process they deform. A study of the rifting is beginning to reveal the properties of the plates that compose the Earth's crust.

83:6910 Farrington, J.W., 1983. Bivalves as [valuable] sen-

tinels of coastal chemical pollution: the [U.S.I Mussel (and oyster) Watch. Oceanus, 26(2): 18- 29. Coastal Res. Center, WHOI, Woods Hole, Mass. 02543, USA.

83:6911 Goldstein, R.J., 1983. Dredge spoil: not always a

waste. Sea Front., 29(4):241-247.

Although dredging is often detrimental to the surrounding environment, proper planning can

result in beneficial effects. Types of dredges and their uses are described, as are potentially damaging consequences such as resuspension of pollutants and downstream siltation problems. In work on the Outer Banks of North Carolina it became apparent that dredge spoil was useful for rebuilding washed out sections of beach and for building islands (now outnumbering natural islands) which often replace nesting grounds lost through natural erosion or human intrusion. (jch)

83:6912 Joyce, Terrence and Peter Wiebe, 1983. Warm-core

rings of the Gulf Stream. Oceanus, 26(2):34-44.

A large, multidisciplinary project seeks to under- stand the dynamics of sizable, long-lived warm-core rings--information useful in routing ships, devel- oping offshore platforms, fisheries management, and the study of underwater acoustics. Dept. of Phys. Oceanogr., WHOI, Woods Hole, Mass. 02543, USA.

83:6913 Muench, R.D., 1983. MIZEX: the Marginal Ice Zone

Experiment. Dynamics of polar sea/ice/atmos- phere interactions investigated for information vital to climate studies, offshore oil develop- ment, fisheries management and strategic op- erations. Oceanus, 26(2):55-60. Science Appli- cations, Inc., Seattle, Wash., USA.

83:6914 Pilleri, Georg, 1983. The sonar system of the dolphins.

Endeavour, 7(2):59-64.

Experimental and anatomical findings prove con- clusively that the larynx, and not the melon (a cranial organ), is the source of echolocation clicks in dolphins and whales.

83:6915 Revelle, Roger, 1983. The oceans and the carbon

dioxide problem. Oceanus,, 26(2):3-9.

A doubling of atmospheric CO 2 in the next 100 years would cause a rise in global temperature that would in turn bring a warming of ocean waters and a significant rise in sea level. Dept. of Sci. and Public Policy, Univ. of Calif., La Jolla, Calif., USA.

83:6916 Reynolds, J.E. III, 1983. In the belly of the whale [to

find reasons for mass strandings]. Sea Front., 29(4): 198-205.

Reasons advanced for mass strandings of cetaceans are only conjecture at this point, although stranded individuals often are diseased or parasitized. Nec- ropsy not only helps to determine cause of death but