I’ve been doing some light research into the use of naturally
occurring bitumen, all the way back into prehistory. It’s something
of which I knew very little but could certainly be useful knowledge
for my writing. A mention in a book I’m reading about the ancient
Indus Valley Civilization got me interested.
It seems it was used
all the back into the Paleolithic for all the sorts of things other
tars might — adhesives, sealants. Hand axes have shown traces of
the substance, mixed with clays or other materials, on their broad
ends, supposedly to serve as a sort of pad or grip when wielding the
stone tools. I had always thought they must have been uncomfortable
to hold and use, and apparently our Neanderthals felt the same.
It can be mixed with
oils and/or heated to make it more pliable, and spread on baskets or
pottery to water-proof. It can be used, obviously, on boats of all
sorts (including Native American canoes). In the Indus world, it was
even used to line fairly large pools. One can imagine all sorts of
uses and I intend to do just that in future fiction. I
may just drop some references to it into the next Mora novel. Those
Kohari must calk their sewn-together boats with something.
And, to be sure, it
would have been an object of trade, a resource to be discovered,
exploited, protected. The original black gold? Well, maybe not quite
that valuable but a ready source would still be worth something.