OV RVIEW OF CH PTE
The plates in this book are distributed over nine chapters. This
arrangement has not been made according to a scientific or
other strict order. Rather, my intent has been to start at some
distance, with the more familiar, external aspects of mineral and
rock and proceed from there to the deeper interiors of the
subject.
Each chapter begins with a short introduction, followed by
brief explanatory texts for all the plates in that chapter. Page
number and title identify each plate. Please note that the
explanatory text is a few pages back from the actual plate.
The size of the smaller objects is usually specified in the text,
either by referring to something familiar, like a golf ball, or else
by giving the actual size in millimeters.
PICTURE FACING TITLE PAGE: COLD FIRE
As outlined on page 60, the interior filling of geodes can be,
partly or fully, a precipitate of chalcedony from aqueous solutions that flow into cavities in volcanic rock.The solution often
percolates into
the cavity through one little duct. That event is here illustrated
in graceful curves. Actual size 40 x 50 mm.
PICTURE ON FRONT COVER: PYRITE (PAGE 53),
WOLFRAMITE (PAGE 56), CALCITE ON FLUORITE (PAGE
59), GEODINO (PAGE 76), BOTSWANA AGATE (PAGE 90),
MALACHITE (PAGE 108/109)
The plates in this book are distributed over nine chapters. This
arrangement has not been made according to a scientific or
other strict order. Rather, my intent has been to start at some
distance, with the more familiar, external aspects of mineral and
rock and proceed from there to the deeper interiors of the
subject.
Each chapter begins with a short introduction, followed by
brief explanatory texts for all the plates in that chapter. Page
number and title identify each plate. Please note that the
explanatory text is a few pages back from the actual plate.
The size of the smaller objects is usually specified in the text,
either by referring to something familiar, like a golf ball, or else
by giving the actual size in millimeters.
PICTURE FACING TITLE PAGE: COLD FIRE
As outlined on page 60, the interior filling of geodes can be,
partly or fully, a precipitate of chalcedony from aqueous solutions that flow into cavities in volcanic rock.The solution often
percolates into
the cavity through one little duct. That event is here illustrated
in graceful curves. Actual size 40 x 50 mm.
PICTURE ON FRONT COVER: PYRITE (PAGE 53),
WOLFRAMITE (PAGE 56), CALCITE ON FLUORITE (PAGE
59), GEODINO (PAGE 76), BOTSWANA AGATE (PAGE 90),
MALACHITE (PAGE 108/109)