I took my time getting started because I am headed back to
Brisbane, where I will return my trusty camper van. I must remember to record
the number of kilometers traveled, starting with an odometer reading of 598,766
km. That is right, the old girl, whose name is Aurora, already had over half a
million kilometers traversed, and I have easily added 5,000 km to that number.
I stopped in a couple of small towns, just for the sake of
stretching my legs and buying munchies, but the highlight of the trip was the
Glass House Mountains National Park. These are a set of 7 or 8 volcanic plugs,
spines, and laccoliths formed by bimodal volcanism 30 million years ago. One is
a typical basaltic volcanic plug, not unlike Devil’s Tower. Another is a
trachyte laccolith, and yet another is a comendite (i.e., a peralkaline
rhyolite) spine. The name Glass House Mountains was given to the three largest
and more conical of the mountains by James Cook. We are pretty far inland, but
he sighted the three largest ones from the coast, and used them for surveying
purposes. The name comes from the very distinctive, conical glass furnaces used
at the time in the manufacturing of bottles and other glass articles.
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