Yosemite National Park development. Ackerson Meadow was originally included in the proposed 1890 park boundary but never acquired by the federal government. On September 7, 2016, the National Park Service accepted the donation of the land, making the meadow the largest addition to Yosemite since 1949. Yosemite National Park is located in the central Sierra Nevada of California. Three wilderness areas are adjacent to Yosemite: the Ansel Adams Wilderness to the southeast, the Hoover Wilderness to the northeast, and the Emigrant Wilderness to the north. The park is roughly the size of the U.S. state of Rhode Island and contains thousands of lakes
Geology of the Yosemite area the past couple million years was the primary shaping force of the features (such rapid uplift would have greatly accelerated all types of erosion). Geology of the Yosemite area The exposed geology of the Yosemite area includes primarily granitic rocks with some older metamorphic rock. The first rocks were laid down in Precambrian times, when the area around Yosemite National Park was on the edge of a very young North American continent. The sediment that formed the area first settled in the waters of a shallow sea, and compressive forces from a subduction zone in the mid-Paleozoic fused the seabed