952 resultados para proposed zoning
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The European Union’s regulations governing sovereign debt are based on the principle of equal treatment of all member states. The recommendations we make here concerning changes in European Union sovereign-debt reduction rules take account of national particularities, but are by no means arbitrary in nature. According to the calculations we present here, such reformed regulations would do far more to promote economic growth than would be the case under the Fiscal Compact’s European debt brake. By 2030, real gains in growth will amount to more than 450 billion euros more than the outcome that would presumably be obtained under the European debt brake.
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Phyric basalts recovered from DSDP Legs 45 and 46 contain abundant plagioclase phenocrysts which occur as either discrete single grains (megacrysts) or aggregates (glomerocrysts) and which are too abundant and too anorthitic to have crystallized from a liquid with the observed bulk rock composition. Almost all the plagioclase crystals are complexly zoned. In most cases two abrupt and relatively large compositional changes associated with continuous internal morphologic boundaries divide the plagioclase crystals into three parts: core, mantle and rim. The cores exhibit two major types of morphology: tabular, with a euhedral to slightly rounded outline; or a skeletal inner core wrapped by a slightly rounded homogeneous outer core. The mantle region is characterized by a zoning pattern composed of one to several spikes/plateaus superimposed on a gently zoned base line, with one large plateau always at the outside of the mantle, and by, in most cases, a rounded internal morphology. The inner rim is typically oscillatory zoned. The width of the outer rim can be correlated with the position of the individual crystal in the basalt pillow. The presence of a skeletal inner core and the concentration of glass inclusions in low-An zones in the mantle region suggest that the liquid in which these parts of the crystals were growing was undercooled some amount. The resorption features at the outer margins of low-An zones indicate superheating of the liquid with respect to the crystal. It is proposed that the plagioclase cores formed during injection of primitive magma into a previously existing magma chamber, that the mantle formed during mixing of a partially mixed magma and the remaining magma already in the chamber, and that the inner rim formed when the mixed magma was in a sheeted dike system. The large plateau at the outside of the mantle may have formed during the injection of the next batch of primitive magma into the main chamber, which may trigger an eruption. This model is consistent with fluid dynamic calculations and geochemically based magma mixing models, and is suggested to be the major mechanism for generating the disequilibrium conditions in the magma.
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"An excerpt from the Agency for International Development's program presentation to the Congress outlining the President's foreign aid request for fiscal year ... 1971."
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F available only in microfiche
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Mode of access: Internet.
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D also available in microfiche.
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Mode of access: Internet.
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Mode of access: Internet.
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Photographer''s stamp: Henry Rocher, 88 North Clark Street , Chicago. On verso: E.S. Jenison, Archit [architect] - Rooms 13, 14 & 15. 128 La Salle St. Chicago