Learner's definition of DOMINANT. 1. [more dominant; most dominant] : more important, powerful, or successful than most or all others. The university has/plays a dominant [=major] role in the local economy. Money is the dominant [=main] force in consumer societies. The company is now dominant in its market.
Shale is a fine-grained sedimentary rock that can have high porosity, yet can be nearly impermeable due to the poorly interconnected voids.hale is a fine-grained sedimentary rock that can have high porosity, yet can be nearly impermeable due to the poorly interconnected voids.
Sedimentary rock is formed from the layers of mud, sand, and seashells that have settled at the bottom of shallow seas. These are all soft rocks. Obviously some sea shells and the skeletons of dead animals are quite likely to have been preserved through fossilation in sedimentary rock. Source(s):