from The Century Dictionary.
- noun A variety of bitumen found in Uvalde county, Texas, and in Barbados.
Sorry, no etymologies found.
The only other mineral product is manjak, a species of asphalt, also found in this district and to some extent exported.
-- The oldest rocks of Barbados, known as the Scotland series, are of shallow water origin, consisting of coarse grits, brown sandstones and sandy clays, in places saturated with petroleum and traversed by veins of manjak.
Tepetate (Nahuatl) is a synonym for caliche, the nitrate-bearing gravel or rock of the sodium nitrate deposits of Peru and Chile, while manjak