Process manufacturing produces co-products and by-products. A co-product is a saleable end item that results from a process. A by-product is a material of value that is produced incidental to or as a residual of the process.
D. a rock with metamorphic minerals but no foliation or lineation. A shale is metamorphosed into three rock types: (1) a banded gneissic rock; (2) a rock with small mica crystals with a shiny aspect; (3) a very shiny rock with large mica crystals; and (4) a dull slate with cleavage. Which of the following lists these rocks in order of increasing metamorphic grade?
Difference Between Shale vs Slate. In line with the physical appearances, it would be difficult to detect the differences between the stones shale and slate. And even stone experts without analyzing the atomic weight and structure of these stones might mistake one for the other. Aside from looks, another similarity is these stones are fine-grained rocks.