I conducted melting experiments with a basanite, two hawaiites (DVDP2 and 83415), and a phonolite from Mt. Erebus, Antarctic. All experiments were carried out a 1 atmosphere from 1224$\sp\circ$ to 1049$\sp\circ$C at oxygen fugacity near QFM buffer. I have tested two hypothesis: (1) can a basanite parent magma differentiate at low pressures to produce hawaiite and phonolite magmas, and (2) do the Mt. Erebus rocks represent low pressure differentiation of a parental basanitic magma. Microprobe analyses of glasses and coexisting crystals were used to test these hypotheses.
Metamorphism in the Ollo de Sapo Antiform, part of the Variscan Orogen in NW Spain, was controlled by local, complex interactions of deformation, granitoid intrusions, and regional low pressure metamorphic (LPM) gradient. Detailed analysis of mineral parageneses, in conjunction with geothermobarometry and one-dimensional thermal modeling, have been used to constrain pressure-temperature-deformation (P-T-D) paths for rocks in the antiform.
The purpose of this dissertation were threefold: (1) to develop a taphonomically-based facies (taphofacies) model for a classic, modern carbonate system, the south Florida shelf; (2) to compare and contrast the south Florida taphofacies model to the only other published modern carbonate taphofacies model, that of Parsons (1992) study of the northeastern Caribbean; (3) to compare and contrast a taphofacies model developed from the total mollusc assemblage (pooled sample approach) to models that only evaluate taphonomic changes within a single taxon as it occurs in different environments.
In recent years, the spectrum of stress phenomena, ranging from the tragic to the mundane, has received a great deal of attention in the research literature. Research has found that exposure to a broad range of stress phenomena increases the risk for subsequent psychopathology (Kanner, Coyne, Schaefer, & Lazarus, 1981; Lewinsohn, Mermelstein, Alexander & MacPhillamy, 1985). The assumption that stress phenomena vary along a continuum from mild to severe underlies much of this research (Dohrenwend & Dohrenwend, 1978). Trauma has been understood to constitute the class labelled severe, life event stress (LES) the moderate, and daily hassles (DH) the mild. In empirical studies, these classes have thus been assumed to vary in terms of degree (i.e., quantity) rather than in terms of qualitative differences.