Reviews seismological studies that provide evidence of the existence of continental roots beneath the continents. Suggests, that through the collisions of plate tectonics, continents stabilized part of the mobile mantle rock beneath them to form deep roots. (ML)

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)

Discusses some of the events leading to the development of the theory of plate tectonics. Describes how seismic, volcanic, and tectonic features observed at the surface of the planet are now seen as a consequence of intense internal activity, and makes suggestions about their further investigation. (TW)

Continental geology and tectonics are explored through this study of modern beach sands of South America. This report assesses how well petrographic studies of sandstones can recreate continental geography. Data on the petrography of 218 modern South American beach sands are presented and analyzed. The five major mineral associations of light…

Discusses the development of earth science curriculum projects and student activities via the Central Evolution Education Project (CEEP) for grades eight through ten earth science classes. (SL)

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…

This activity introduces students to the basic concept of seafloor spreading, the processes involved in creating new seafloor at a mid- ocean ridge, the Galapagos Spreading Center system, and the different types of plate motion associated with ridge segments and transform faults. The activity provides learning objectives, a list of needed…

Topics and activities related to oceanographic research (innerspace exploration) are the focus of this multidisciplinary, marine education teaching guide for students in kindergarten through grade 6. The guide is divided into six sections (labeled A through F). The first five sections consist of various kinds of activities, with the appropriate…

The student textbook is designed for grades 5-8 and explores various earth science topics. A cartoon character named Tommy Tsumi explores earth facts and concepts throughout the text. Activities, materials, and learning objectives for each unit in the textbook are presented in the teacher's guide. Units in both books include: (1) "The Outside…

Knowledge of the physiographic evolution of the Tasmanian landscape is still very far from complete; however, all aspects of the landscape are governed by definable processes acting on the rock medley which is the heritage of Tasmania's geological history. This book explains Tasmania's landforms and geology in terms of geologic processes. Chapters…

Provides background information on the layers of the earth, the relationship between changes on the surface of the earth and its insides, and plate tectonics. Teaching activities are included, with some containing reproducible worksheets and handouts to accompany them. (TW)

This student text is designed for grades 2-4 and explores various earth science topics. A cartoon character named Tommy Tsumi explains earth facts and concepts throughout the text. Activities, materials, and learning objectives for each unit in the textbook are provided in the teacher's guide. Units in both include: (1) "What Does Our Earth…

The Ocean Drilling Project brings together scientists and governments from 20 countries to explore the earth's structure and history as it is revealed beneath the oceans' basins. Scientific expeditions examine rock and sediment cores obtained from the ocean floor to learn about the earth's basic processes. The series of activities in this…