You are drilling a water well when you hit water at a much shallower level than you expected. What have you likely found?
1a perched aquifer
2an artesian aquifer
3 a natural spring
4 an aquicide
In what types of rocks are ore minerals found?
1 only in igneous rocks
2 only in igenous and sedimentary rocks
3 only in igneous and metamorphic rocks
4 in igenous, sedimentary and metamorphic rocks