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The idea for a book on anorthosites came to me in January of 1986
while returning to Houston after holiday festivities in Dallas. The
original idea was a review paper on anorthosites, but by the time I
reached Houston, the subject material I contemplated induding was
obviously too extensive for a single paper. The Director of the
Lunar and Planetary Institute, Kevin Burke, was receptive to the
idea of a book, and suggested that I contact Peter Wyllie, who
serves as Editor of the Springer-Verlag series Minerals and Rocks.
This effort, which I originally expected would take about a year,
has taken nearly 6. I have many excuses- indolence, moving to
another continent, other commitments, etc.-but the basic truth is
that writing a book is much larger an undertaking than can be
anticipated. Many people are aware of this, and I was duly
forewarned. . But why write a book on anorthosites? This is a very
good question, which I have considered from many angles. One
rationale can be expressed in terms of a comparison between
anorthosite and basalt. A first-order understanding of basalt
genesis has been extant for many years. By contrast, there is
little agreement about the origin of anorthosite. There are good
reasons for studying and writing about basalt: it is the most
abundant rock type on the Earth's surface, and is also plentiful on
the surfaces of the other terrestrial planets.
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