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Petrogenetic Temperature Of The Oka Carbonatite
No full textThe Oka complex is a carbonatite and feldspathoidal silicate complex belonging to the alkaline intrusive suite of the Monteregian petrographic province. In order to learn more about the petrogenesis of this carbonatite, a temperature of 710 C was determined from the intersection of the fO2-T curves for the minerals: olivine, magnetite, latrappite. This is the temperature at which the minerals were last in oxygen equilibrium, and it is believed to be the original solidus. This temperature is in agreement with O18/O16 work (Conway and Taylor, 1969), and it is reasonable in light of Wyllie's work on synthetic systems (1966). Wyllie also found the presence of a liquid phase at these temperatures throughout a wide range of pressures, and therefore, the Oka carbonatite is believed to be of magmatic origin. The mineralogy and phase equilibria of the mineral, latrappite, are also studied, and some possible explanations for the problems associated with its crystal chemistry are discussed.Earth and Environmental Scienc
Sedimentology and Paleoenvironments of the Oriskany group of Eastern Pennsylvania
No full textThe Lower Devonian (Deerparkian) Oriskany Group in eastern Pennsylvania has been shown to have been deposited under conditions of marine regression (Epstein etal, 1967). This study integrates field evidence and cumulative size frequency dat a in an investigation of the stratigraphic expression of marine regression. Lower Devonian paleogeography is interpreted, and the central Appalachian Basin shore line is adjusted from recently published maps (Boucot, 1968; Head, 1969) to include a land ·mass near Andreas, Pa. The Oriskany Group in eastern Pennsylvania is divided into three lithologic units based on bedding sequence, sedimentary textures, and sedimentary structures. Lithologic unit one is a sequence of poorly bedded silty shales and siliceous argillaceous limestones which thickens to the northeast. The unit is interpreted as occupying an environmental position offshore and below wave base. Lithologic unit two is a sequence of thinly bedded coarse sandstones disconformably overlying, and interbedded with, rocks identical to those in unit one. Unit two represents deposition of sand by ripple trains or sand waves during storms in near (but below) -wave base environments of unit one. Lithologic unit three is a sequence of thick bedded sandstones which were deposited in a nearshore bar and beach environment. Analysis of cumulative size-frequency data supports the contention of Spencer (1963), that all sediments are mixtures of two or three log-normally distributed populations of sediment, and that sorting can only be defined by the degree of truncation of the size-frequency curve. Although the Oriskany is usually called a well sorted sand, only sand beds from Kunkletown (interpreted as the most nearshore of the three sections studied) show any evidence of sorting based on the above definition. Sand beds become coarser in a nearshore direction, but wide vertical fluctuations in coarseness measures· are present in any one section. The sequence of lithologies, textures, and structures of the Oriskany Group of eastern Pennsylvania are suggested as a model of the condition of marine regression.Earth and Environmental Scienc
A study of the cooperative office work experience program in New Jersey, 1958-1959
No full textIntroduction. Statement of the Problem: It was the purpose of this study to determine the current status, practice, and problem of the cooperative office work experience programs that existed in the public high schools in the State of New Jersey with implications for those who plan to organize and develop such programs. It is generally believed that a cooperative office work experience program is a learning device which will provide more effective training for office jobs
Conceptions of the self in the existential writings of Gabriel Marcel and Albert Camus : a comparison
No full textA study of the vowel situations in a primary reading vocabulary
No full textIntroduction. Statement of the Problem: This is an investigation of the vowels and vowel combinations which appear in certain basal readers designed for use in the primary grades
A Development of Orthogonal Functions as Series Solutions of the Partial Differential Equations of Physics
No full textIntroduction. Statement of problem: The primary purpose of this study is to indicate the manner in which a Boundary Value problem in Physics leads to the solution in generalized Fourier Series. The conditions to be met in problems of this sort are generally the Partial Differential Equation and several unique physical conditions which are imposed on the distribution sought after. The problem is solved when a mathematical solution of the Differential Equation is found which satisfies all of the restrictions levied by the physical considerations. The secondary purpose of this study is to obtain a view of the generalized problem which leads ultimately to the Sturm-Liouville theory