What is the layer of the earth that we stand on that is only a few miles thick? it is not the crust; the answer has like 16 letters (crossword)

If the word is "around 16 letters" try Continental Crust

Answer (d) may increase or decrease porosity through dissolution or deposition;

The reason why i feel that the theory of plate tectonics is correct because scientists have found dinosaur bones of the same species in africa, asia, and in the americas. which means that they must have been together at one point in time. plate tectonics is also how the hawaiian islands were formed. as the plate hawaii is on was moving north west, magma would melt through the sea bottom and hardening. forming into the island chain. plate tectonics also explains the mariana trench. two plates were moving away from each other and made a giant crack in the ocean floor running 2,550 kilometers (1,500 miles)  long.