N O T I C E THIS DOCUMENT HAS BEEN REPRODUCED FROM MICROFICHE. ALTHOUGH IT IS RECOGNIZED THAT CERTAIN PORTIONS ARE ILLEGIBLE, IT IS BEING RELEASED IN THE INTEREST OF MAKING AVAILABLE AS MUCH
An equivalent layer magnetization model obtained from inversion of long wavelength satellite magnetic anomaly data indicates a very magnetic source region centered in south central Kentucky. The magnetization maximum nearly coincides with a gravity high elongated north-south and extending into Tennessee. Previous refraction profiles suggest that the source of the gravity anomaly is a large mass of rock occupying much of the crustal thickness. The outline of the source delineated by gravity contours is also discernible in aeromagnetic anomaly patterns. Taken together, the geophysical data suggest a large, localized mass of intracrustal rock which is both dense and very magnetic. A simple magnetization/density model is given which accounts for the gravity and long wavelength aeromagnetic anomalies due to the body. We interpret it as a mafic plutonic complex, and several lines of evidence are consistent with a rift association. The body is, however, clearly related to the inferred position of the Grenville Front. It is bounded on the north by the fault zones of the 38th Parallel Lineament. The inferred mean magnetization (4 A/m) of the body is large, but not inconsistent with values reported by others for deep crustal bodies associated with long wavelength magnetic anomalies. Such magnetization levels can be ach'eved with :magnetic mineralogies produced by normal oxidation and.metamorph°c processes and enhanced by viscous build-up, especially in mafic rocks of alkaline character.
Satellite Power System (SPS) student participation
The purpose of this paper is to present a preliminary assessment of methods which are appropriate to initiate student participation in the discussion of a Satellite Power System (SPS). Often considered as an element of a broader citizen participation effort, this assessment of student participation focuses on those methods which can be incorporated into the campus environment and the on-going learning experience. For the purposes of this paper, we have considered students to be those who are pursuing an education at two and four-year post-secondary institutions. The review of the literature and related materials was centered on information and ideas from those engaged in day-to-day delivery of student services and programs. This search revealed that, while many practitioners are convinced that the need to promote student participation programs in societal issues is great, in-depth research on how to realize this objective is lacking. The current re-evaluation of the concept of general education, launched by the academic community, presents an opportunity to up-grade consideration of how to make student participation activities more effective. The paper concludes with two categories of recommendations. The first category outlines fourteen recommendations addressing specific activities related to student participation in the discussion of SPS. The secondmore » category outlines three recommendations pertaining to student participation activities in general.« less
Magnetic anomalies from satellite magnetometer
Proton magnetometer measurements were made from the USSR satellite Cosmos 49 during the period October 24 to November 3, 1964. A selected number of the 18,000 observations were fitted to a special field model; residual anomalies were less than 100 gammas and appear to be consistent with belts of broad anomalies that are known from surface and near-surface magnetic measurements. Correlation of the residual anomalies with broad geologic provinces is good. A series of magnetic lows across the continental United States agrees in position with a proposed rift extending from the Cape Mendocino fracture off the west coast to the wrench fault system proposed by C. L. Drake and H. P. Woodward in the east coast area. In the western United States, large-amplitude magnetic lows are associated with the Basin and Range province and the northern Rocky Mountains; both regions are characterized by high heat flow and similar crustal structure and Cenozoic geologic history. Most of central Wyoming, central Montana, and the area of the Colorado plateau is characterized by normal heat flow and generally positive magnetic anomalies.