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?
lithify (third-person singular simple present lithifies, present participle lithifying, simple past and past participle lithified) To turn sediment into solid rock 2003, Ann G. Harris et al., Geology of National Parks, ISBN 0787299707, page 13: Shale is fine-grained rock made of silt or wet mud that has been lithified by compaction and cementation.