Microfacies analysis and metre-scale cyclicity in the Givetian back-reef sediments of south-east

Garland, J., Tucker, M.E., and Scrutton, C. T. 1996. Microfacies analysis and metre-scale cyclicity in the Givetian back-reef sediments of south-east Devon. Proceedings of the Ussher Society, 9, 031-036 The Givetian (Middle Devonian) of south-east Devon consists of reef and back-reef facies (Tor Bay Reef-Complex) developed on a shelf-edge rise. Three sections in the Newton Abbot area have recently been studied with emphasis on detailed logging, sampling and thin section analysis of the back-reef sediments. Eight microfacies have been identified ranging from shallow subtidal to exposed supratidal deposits, forming four groups. 1. Semi-restricted subtidal -stromatoporoid floatstones, low-energy accumulations, least restricted facies -Stachyodes rudstones, high-energy back-reef talus 2. Restricted subtidal -Amphipora floatstones, low-energy accumulations -gastropod packstones, back-reef sedimentation with temporary agitation -fossil-poor peloidal and fenestral wackestones, calm water deposition 3. Restricted intertidal -peloidal grainstones with micritised grains, deposition in channels ripping up subtidal facies. Restricted supratidal -microbial laminites -immature palaeosols A small-scale cyclicity can be identified by the arrangement of microfacies vertically. Typical cycles show a stromatoporoid-rich base, followed by an Amphipora floatstone, capped by a fenestral fossil-poor micrite. Locally emergence is indicated by juvenile soil development or laminite deposition. Cycles are on average 2 to 3 m thick. Fischer plots have been produced to show the pattern of cycle development through time, and comparisons between sections is attempted. The mechanism causing cyclicity is as yet still unclear, with an intricate balance between autocyclic and allocyclic factors being probable

PSS8 Use of consumer market research panels to generate prevalence and disease burden estimates in data-sparse diseases: a case study in severe Chronic Hand Eczema

Farrando, Jordi;Febles, Maria Dolors ;Henrich, Jordi;Tarrasó, Olga ;Fuertes, J.C.;Pérez, S

Cosmology, Oscillating Physics and Oscilllating Biology

According to recent reports there is an excess correlation and an apparent regularity in the galaxy one-dimensional polar distribution with a characteristic scale of 128 $h^{-1}$ Mpc. This aparent spatial periodicity can be naturally explained by a time oscillation of the gravitational constant $G$. On the other hand, periodic growth features of bivalve and coral fossiles appear to show a periodic component in the time dependence of the number of days per year. In this letter we show that a time oscillating gravitational constant with similar period and amplitude can explain such a feature.Comment: 9 pages. latex using revtex. This revised version is supposed to be free of e-mail nois

The fundamental constants and their variation: observational status and theoretical motivations

This article describes the various experimental bounds on the variation of the fundamental constants of nature. After a discussion on the role of fundamental constants, of their definition and link with metrology, the various constraints on the variation of the fine structure constant, the gravitational, weak and strong interactions couplings and the electron to proton mass ratio are reviewed. This review aims (1) to provide the basics of each measurement, (2) to show as clearly as possible why it constrains a given constant and (3) to point out the underlying hypotheses. Such an investigation is of importance to compare the different results, particularly in view of understanding the recent claims of the detections of a variation of the fine structure constant and of the electron to proton mass ratio in quasar absorption spectra. The theoretical models leading to the prediction of such variation are also reviewed, including Kaluza-Klein theories, string theories and other alternative theories and cosmological implications of these results are discussed. The links with the tests of general relativity are emphasized.Comment: 56 pages, l7 figures, submitted to Rev. Mod. Phy

Cold Inactivation of l-Threonine Deaminase from Rhodospirillum rubrum

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/66171/1/j.1432-1033.1971.tb01491.x.pd