Title: Death Valley National Park - Wikipedia
Headings: Death Valley National Park
Death Valley National Park
Contents
Geographic setting
Climate
Human history
Early inhabitants and transient populations
Boom and bust
Early tourism
Protection and later history
Geologic history
Basement and Pahrump Group
Rifting and deposition
Compression and uplift
Stretching and lakes
Biology
Activities
See also
References
Explanatory notes
Citations
Bibliography
External links

Content: The valley later became the subject of books, radio programs, television series, and movies. Tourism expanded in the 1920s when resorts were built around Stovepipe Wells and Furnace Creek. Death Valley National Monument was declared in 1933 and the park was substantially expanded and became a national park in 1994. The natural environment of the area has been shaped largely by its geology. The valley is actually a graben with the oldest rocks being extensively metamorphosed and at least 1.7 billion years old. Ancient, warm, shallow seas deposited marine sediments until rifting opened the Pacific Ocean. Additional sedimentation occurred until a subduction zone formed off the coast. The subduction uplifted the region out of the sea and created a line of volcanoes. Later the crust started to pull apart, creating the current Basin and Range landform. Valleys filled with sediment and, during the wet times of glacial periods, with lakes, such as Lake Manly .