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Located south of Tucson in Pima County, Arizona, the 52,000 acre Santa Rita Experimental Range (SRER) was founded in 1903 and administered by the United States Forest Service until 1987, when the University of Arizona College of Agriculture took over administration of the site. The mission at the SRER is "to advance research and education on ...
The Index to Marine & Lacustrine Geological Samples is a collaboration between multiple institutions and agencies that operate geological sample repositories. The purpose of the database is to help researchers locate sea floor and lakebed cores, grabs, dredges, and drill samples in their collections.
Arizona is known as the Copper State because it produces two-thirds of US copper annually. Laramide copper porphyry deposits are common around Tucson and include the Twin Buttes, Sierrita-Esperanza, Rosemont, Silver Bell and Mission-Pima mines, as well as the historical Ajo mine to the west.
The total amount of Hg discharged into Clear Lake over the past 15,000 years is estimated to be at least 2,400 metric tons." [57] [58] [59] The EPA-funded research by UC Davis found that total levels of mercury (TotHg) in the lake sediments has "not declined significantly a decade after" the remediation work in 1992 at Sulphur Bank Mine. [60]
Fossil Creek (Yavapai: Hakhavsuwa or Vialnyucha) is a perennial stream accessed by forest roads near the community of Camp Verde in the U.S. state of Arizona.Primary access is from Forest Road 708 off Arizona State Route 260 east of Camp Verde.
Example of a sediment core taken from the Forlorn lakes in Gifford Pinchot National Forest, Washington. Paleoclimatology (the study of past climates) uses proxy data in order to relate elements collected in modern-day samples to climatic conditions of the past. In paleolimnology, proxy data refer to preserved or fossilized physical markers ...
At the same time, sediment filled the lakes behind the dams. Sediment would fill a lake behind a 150-foot (46 m)-high dam in 10.33 months, filled a lake behind an 1,150-foot (350 m)-high dam in 345 years, and filled the lake behind the tallest dam in 3000 years. [77] Cascades of water flowed over a dam while waterfalls migrated up-river along it.
Arizona Power Company—later a part of the Arizona Public Service Company (APS)—began construction of the Childs Power Plant in 1908. Because the land around Fossil Creek consists mainly of mountainous terrain and canyons, and the nearest railroad station was in Mayer , more than 400 mules and 600 men were used to pull more than 150 wagons ...