Tag Archives: Iceland

Striped oceans and drifting continents

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Wegener's continent reconstruction for the Carboniferous Period, 300 million years ago

Continental Drift was the leading hypothesis for continental aggregation, prior to plate tectonics

German meteorologist Alfred Wegener, in a fit of creativity, presented his ideas about drifting continents to a 1912 geological meeting in Frankfurt.  He published an expanded version of his theory in 1915 – The Origin of the Continents and Oceans, to muted applause and resounding derision.  I found this quote by Russian contemporary, Vladimir Beloussov, in Arthur Holmes’ Principles of Geology wherein Beloussov quips in less than glowing terms of the …total vacuousness and sterility of the hypothesis.  The tenor of this remark was probably typical of Wegener’s detractors.  In fact, even today, certain scientific hypotheses and theories suffer the slings and arrows of equally vacuous remarks from the scientifically challenged.  As it turned out, Wegener’s revolutionary ideas were the vital spark that gave birth to modern Plate Tectonics. Continue reading

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The fate of oceanic islands

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oceanic-islands-rarotonga

Oceanic islands, specks, some barely visible across expansive seas; conjured images of a tropical paradise – the overstated tourist brochure or the understated Gauguin portrait.  The images are iconic. And they are home to tens of millions of people.  Not stated in all the hype is their fragility – a fragility borne of all the processes which shape oceanic islands; geological, biological, climate and perhaps anthropological.  We have been reminded of their fragility by recent evidence that some islands are at risk of disappearing beneath the waves.  Media reports of their demise tend to focus on rising global sea levels caused by climate change.  However, it is important to consider an island’s state in the context of all the natural processes that led to its formation, because its ultimate fate, from a geological perspective, is to founder.

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Geological Trappings; Carbon Capture and Storage

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sky image

CCS – what is it?

Carbon dioxide is a significant by-product of oil and natural gas production at the well-head, hydrocarbon and coal combustion (especially in power generation) and several manufacturing industries (e.g. cement).  Carbon Capture and Storage (CCS) involves technology that captures CO2 produced by these industrial processes and stores it underground.  In doing so, CCS technology attempts to prevent the CO2 from being released into the atmosphere.  From the point of view of potential climate change it seems like a sensible thing to do.  However, CCS does have its detractors who argue primarily that either it doesn’t matter how much CO2 enters the atmosphere, or that the costs far outweigh the benefits.  Indeed, the cost of CCS programs is high.  Regardless, the science of CCS is fascinating. Continue reading

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