Sunday, 4 December 2011

Sequence and layout of articles ~

After a great deal of reading, sorting of geological information and experimental groupings I've arrived at a sequence that I think makes good sense.  Each group has been allocated a month of the year, which I outline below.  Please note that the Chronicle has to be set out in reverse chronological sequence due to limitations of the blogger format:

Part of what I want to share with this chronicle is an understanding of the sorts of processes and minerals that have formed the surface of our planet.  The sequence shown here is my effort to make this relatively clear.  I'm no geologist, so won't get it right all the time but despite this have made every effort to sift through and make sense of information from reputable sources.  Constructive comments and corrections are welcome.

The planet's rocks fall into three main groups so I'll start with them.  The three types of rocks are:
  • Igneous rocks - which have resulted from volcanic activity.  (These articles have been placed in November)  I've expanded this to include minerals and formations that are associated with hydrothermal activity.  This group includes obsidian, sodalite, moonstone and others.
  • Metamorphic rocks (October) - These have been subjected to immense pressures, heat, and possibly chemical interactions as well, which have changed them from the structure they once had.  This group includes jadeite, serpentine, quartzite, and others.
  • Sedimentary rocks (September) - these have formed from layers of minerals and detritus having drifted down and accumulated over very long periods of time - usually in water.  This group includes sandstone, azurite, and selenite, to name a few.
The subject of sedimentary rocks with its focus on the watery depths leads on to the subject of other...
  • Watery treasures (August), and indeed the chemical content and temperature of the waters themselves, primarily sea water, so the next section is about this.  Articles in this section include pearls, coral, shells, and the related topic of calcite and aragonite from which shells are formed.  This last matter had me baffled for a longish stretch when I was doing the reading for this section, and I want to make this easier for others to grasp!
The next section is about silicates, which occur in all kinds of rocks.  It's a big topic so I've divided it into chunks: 
  • Quartz crystals, pebbles and obvious variations (July), for example, amethyst, rose quartz, and smoky quartz.
  •  Agates and jaspers (June) : such as carnelian, onyx, and tiger's eye.
  • Other silicates which are transparent or semi-transparent (May), such as topaz, garnet and emerald.
Then we have a group of 'other gems' (April):  These include the non-silicates, as well as those which may be rare or unusual, or which I'm simply not yet sure where to place.

Next we have the metals or ores (March), which includes
  • The mica group and others such as pyrite, bornite and chalcopyrite.
All about wood (February), which includes:
  • Amber, petrified wood, and wood itself.
And finally any miscellaneous articles, cogitations and conclusions. (January)
This is where I'll put my article about costume jewellery.

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