Discusses sediment drift patterns on the North Atlantic Ocean floor. Includes photographs and a discussion of the wide variety of sediment formations. (CP)

Discusses mechanisms which influence both rapid and gradual modifications of ocean beaches. Among factors described are storms, waves, currents, tides, sediment transport, and climate. Some effects of these forces upon coastline configurations are also presented. (WB)

Introduces a series of related articles on the study of ocean/continent boundaries (margins) within the framework of plate tectonics. Topics discussed include: early attempts to interpret ocean/continent boundaries, Atlantic-type margins, Pacific-type margins, the edges of ancient oceans, and future challenges in the study of continental margins.…

The development of the South Atlantic continental margins through geological time is discussed in a series of three time slices, all of which depict various characteristics in the initial formation of this margin during the Cretaceous period (180 to 65 million years ago) of the Mesozoic era. (BT)

Traces the history and development of the Deep Sea Drilling Project, focusing on the Glomar Challenger, drilling improvements, and international significance. Includes photographs, illustrations, and tables. (DC)

Recent research studies of both classifications of ocean margins (active or of Pacific type and passive or of Atlantic variety) have yielded a considerable amount of new information leading to some new theories. These theories regarding different kinds of tectonic activity are discussed. (BT)

Describes the scientific accomplishments of the International Program of Ocean Drilling (IPOD) during its first decade. Notable are the scientific contributions to understanding the sea floor. Critical decisions for the second decade include economic and social implications. (MA)

Describes the operation and use of the scanning electron microscope as an important tool for ocean scientists. Numerous electron micrographs are included. (MA)

Discusses the origin and existence of sediment layers in the Atlantic Ocean. (CP)

Discusses the nature of and activities in marine geology/geophysics, oceanographic engineering, physical oceanography, chemical oceanography, and biological oceanography. This information, which includes comments on major employment positions (academic, government, industry, consulting), is provided to help students select possible careers in…

During some ice ages, there has been an increase in the production of cold bottom water, whereas in others there has been a decrease. Researchers are investigating why this has occurred. (Author/BB)

One model of future climate predicts that, after a warm interval of a thousand years or so, the next ice age will peak in 23,000 years. (Author/BB)

Although helium is the second most abundant element in the universe, very little is found in the earth. This article discusses the geochemical cycle of helium and attempts to account for the scarcity of helium. (MA)

The mixing of sediments by organisms (bioturbation) is discussed. Research techniques are discussed and data on Atlantic bioturbation rates are provided. (CP)

Provides a survey and a review of earthquake activity and global tectonics from the advancement of the theory of continental drift to the present. Topics include: an identification of the major seismic regions of the earth, seismic measurement techniques, seismic design criteria for buildings, and the prediction of earthquakes. (BT)