When an uplift pushes a batholith or smaller body of hardened magma toward the surface. And sometimes when magma fails to reach the surface it hardens in to rock. Over time, the forces that wear away Earth's surface such as flowing water, ice, or wind-may strip away the layers above the hardened magma and finally expose it.
Deciding if a trout is a sea trout or a brown trout can be easy if the sea trout is fresh run from the sea âsea trout are distinctively silvery in colour and may still carry sea lice. However, once they have been in fresh water for a while they return to brown trout colours.
As long as its not pouring, Rain will bring the fish (trout particularly) to the surface looking for bugs. Some of my best fishing days have been on overcast light shower days. Spinners are always good for trout (gold or silver or rainbow I've had most luck on). If you fly fish, Definately get a fly out there.