How did repeated magma intrusions help form the Sierra Nevada batholith?

The Sierra Nevada batholith was formed by repeated intrusions of magma deep beneath the Earth's surface. These intrusions, composed of molten rock, gradually cooled and solidified to create large bodies of igneous rock, such as granite. This process occurred over millions of years, with numerous magma pulses contributing to the formation of the massive batholith. The Nevadan orogeny, a mountain-building event that began around 156 million years ago, is associated with the formation of these vast batholiths in the Sierra Nevada. The uplift and tilting of the Earth's crust also played a role in shaping the Sierra Nevada range.12345