State of Research on the Snowball Earth Hypothesis Essay

State of Research on the Snowball Earth Hypothesis The Snowball Earth Hypothesis also known as the Varangia glaciation is a hypothesis presented in 2001 by Geologist Paul Hoffman. (Wikipedia, 2002) The hypothesis purposes that 540 million years ago during the Neoproterozic, a meter thick of ice covered the oceans and glaciers the continents for 100 million years. Albedo; when ice and snow reflect solar radiation into space, in absents of greenhouse gases, which dont exist within the atmosphere, heat therefore escapes the planet. A condition of temperature disequilibrium occurs, when freezing cold reaches a state, the climate never warms to normal, and cold freezes the hemisphere and buries it under massive glaciation.†¦show more content†¦(Knoll) In 1998 the team of geologists had culled clues from Namibia and fashioned the Snowball hypothesis. (monastersky, 1998) Source and Nature of research The research into collecting data proving or disproving Snowball Earth was conducted by geologists who had collected Neoproterozoic rock samples in Australia, China, western U.S., Arctic Islands of Svalbard and the Namibia coast. (Hoffman, et al. 1998) Research included conducting a geologic survey of the Congo craton, facies of Ghaub formation fill valleys. Rock specimens were taken from the lower glacial intervals (Chugs Formation) to just beneath the unconformity at the base of Mulden group, Southern Damara margin of the craton and Kaoko craton, Kalahari craton, Amadeus basin. These rock specimens were microdrilled and the elements Sr, Mn, Fe, Ca, Mg were measured for abundance using inductively coupled plasma emission spectoscopy to assess diagenetic alteration. These sample were analyzed offline for DELTA 13 CARBON AND DELTA 18 OXYGEN after digestion for 3 hours in H2po4 at 50C to insure complete reaction of dolomite: the evolved gas was measured on a finnigan mat, other research consisted of fisions secter mass spectrometer, graphite -furnace atomic absorption spectoscopy, leached in NH4CH3COO, digestion in weak acetic acid. (Hoffman, et. al. 1998) Analysis of Snowball Earth Hypothesis The data obtained from cap carbonates deposited whereShow MoreRelatedThe Implementation Of Population Control Against Poverty1320 Words   |  6 Pageshas very limited impact. Incidences of unwanted pregnancies remain high even in countries where free contraceptives are easily available, such as the United States (Finer, 2014). Additionally, overpopulation is not an issue since the birthrate has already fallen from 4.9 children per woman in the 1960s to 2.7 in 1992 (UNSD, 2015). 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