Describes the changes taking place as a result of the depletion of groundwater supplied by the Ogallala aquifer. Provides maps and tables which show changes occurring in agriculture, and reports the results of a survey of residents' opinions on potential solutions to the problem. (JDH)

Discusses the challenges confronting plate tectonics. Presents evidence that contradicts continental drift, seafloor spreading, and subduction. Reviews problems posed by vertical tectonic movements. (Contains 242 references.) (DDR)

Discusses: (1) the beginning of glaciology; (2) origin of erratic boulders, meteorites, volcanic explosions, floods, and drift; (3) ice age hypothesis in Europe and the United States; (4) development of glacial theory; (5) and a unified explanation of glacial events. A bibliography of classical research on glaciology is included. (BC)

Discusses the use of remote sensing techniques to obtain locational, estimated, and mapped information at the scales varying from individual fields and farms, to entire continents and the world. (AEM)

Offers explanations on the origin of the North American Atlantic continental margin. Provides an analysis and illustrations of structural and strategraphic elements of cross sections of the Atlantic continental margin. Also explains the operations and applications of seismic-relection profiles in studying ocean areas. (ML)

Examines background related to the question of how to classify Papua New Guinea for study in regional geography courses. Concludes on the basis of physical and cultural similarities that Papua New Guinea should be included as the tenth country in Southeast Asia. (Author/DB)

Presents a review of the National Geographic Society's campaign to upgrade the teaching of geography in U.S. schools. The campaign includes the development and dissemination of exemplary curriculum materials and a broad range of teacher training activities. Concludes that the U.S. is breaking new ground in facing the reality of geographic…

Discusses the meaning of sea level change and identifies the major factors responsible for this occurrence. Elaborates on the theory and processes involved in indirect measurement of changes in sea volume. Also explains how crustal movement affects sea level. (ML)

Designed to serve as a complement to the Unesco Technical Papers in Marine Science, this report concentrates on theoretical and practical problems of geological mapping of the sea floor. An introduction is given to geological mapping procedures at continental margins as well as some practical recommendations taking as an example the African region…