coal ball उदाहरण वाक्य

उदाहरण वाक्य

1. Coal balls commonly contain dolomites, aragonite, and masses of organic matter at various stages of decomposition.
2. The acid dissolves the mineral matter from the coal ball, leaving a projecting layer of plant cells.
3. Coal balls are calcium-rich permineralised life forms, mostly containing magnesium carbonates, pyrite, and quartz.
4. They stressed the importance of interaction with seawater, believing that it was necessary for the formation of coal balls.
5. Her process essentially entails heating and then making multiple applications of solutions of paraffin in xylene to the coal ball.
6. Each subsequent application has a greater concentration of paraffin in xylene to allow the wax to completely pervade the coal ball.
7. Coal balls in North America were found in Iowa coal seams since the 1890s, ) drew the parallel in 1922.
8. Stopes made major contributions to knowledge of the earliest angiosperms, the formation of coal balls and the nature of coal macerals.
9. Other minerals, including gypsum, illite, kaolinite, and lepidocrocite also appear in coal balls, albeit in lesser quantities.
10. The process required cutting a coal ball with a diamond saw, then flattening and polishing the thin section with an abrasive.