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.
Thus, while the lake trout may be found in shallow water only 10 to 15 feet deep in spring and fall, it follows these frigid water temperatures to depths of 100 to 200 feet in the summer and winter.This restless denizen of the cold, deep waters is a true wanderer, often ranging many miles in search of prey.he eggs are deposited after dark, often on shoals. Young lake trout become sexually mature at 6 or 7 years of age. The average adult weighs in at 9 - 10 pounds but some individuals weigh up to 50 pounds (the Michigan record is 61 1bs and 8 oz). The life-span of the lake trout may exceed 25 years.