...
Location:
...
Shore
...
of
...
the
...
Wouri
...
river
...
(25
...
km
...
from
...
the
...
Atlantic
...
ocean),
...
City
...
of
...
Douala
...
(long.
...
9
...
42';
...
Lat.
...
4
...
3'),
...
Cameroon.
...
...
Provenance:
...
Mix of (1) ?volcanic source rich in quartz with (2) ?basaltic gas-rich lava; also, (3) some arid-climate components.
