Tolbachik still not giving up

Attention to active volcanoes tends to go down the longer they are active. The only time you hear something about Kilauea for example is when something like a lava lake drains, new lava fountains show up or when a piece of property is destroyed by the ever-present lava flows, which are in itself one of…

The Dead Zone

Updated 13 Sep 2012, see end of article. In logic, an assumption is a proposition that is taken for granted, as if it were true based upon presupposition without preponderance of the facts. (Wikipedia) Back around May of this year, Carl asked me to do a series of simulations using KWare’s Heat3D, a program written…

Edinburgh – Volcanic heart of Scotland

Edinburgh – home of the Scottish Parliament, Military Tattoo, Princes Street and gardens, Scott memorial, Murrayfield, Valvona and Crolla’s food emporium, sundry pubs (!), volcanoes…Eh, volcanoes? Surprising as it may be to some people, Edinburgh plays host to a great variety of igneous rocks. The most obvious and in our case, the most interesting, are…

An introduction to igneous rocks – Part 2

Micas Of which there are two predominant varieties in igneous rocks – Biotite and Muscovite – are a group of phyllosilicates; the name in allusion to the method and ease of perfect cleavage of the mineral into exceedingly thin laminae. They are characteristic of a wide range of rock type. Biotite, the mafic variety, is…

An introduction to igneous rocks – Part 1

What is an igneous rock? It’s hard, may be pale or nearly black, but what’s in it? This entry is aimed as a brief introduction to igneous mineralogy/petrology to the ‘beginners’ and it may be useful to have available a mineralogy and/or petrology text, see the ‘Books’ below the title bar. An igneous rock is…