Physiography. Tanzania has both the highest and lowest elevations in Africa - the summit of Mt. Kilimanjaro (5,950 metres above sea level (a.s.l)) and the floor of Lake Tanganyika (358 m below sea level). Except for the coastal belt, most of the country is part of the Central African plateau (1,000 – 1,500 metres a.s.l) characterised by gently sloping plains and plateaux broken by scattered hills and low-lying wetlands.
Physiography. Elevations in the WMA range from 2,300 feet at the mouth of Canyon Creek to just under 7,000 feet at the Snow Peak. Forty percent of the area lies over 5,000 feet. Most of the area is steep and broken with level ground found only on ridge tops. Slopes along the stream break usually exceed 50 percent while slopes of the general area vary from 30 to 40 percent.
Physiography. The Pxxxxx Mine is situated in the Great Basin physiographic province and the Basin and Range tectonic province. North-south mountain ranges and parallel intermontane basins characterize the area. The entire region is a closed drainage system with all the permanent streams flowing to interior "sinks" such as the Cxxxxx and Humboldt sinks, or interior lakes such as Pyramid and Wxxxxx. Elevations in the area range from about 4,000 feet above mean sea level in the basinal areas, to over 9,000 feet in the surrounding ranges. The terrain is generally moderate.
Physiography. The Twin Creeks property lies in an alluviated valley southeast of the Dry Hills, a northeastern outlier of the Oxxxxx Range in northern Humboldt County, Nevada. The Dry Hills is an area of gently north-dipping Upper Paleozoic carbonate sediments, stratigraphically higher than rocks in the rest of the Oxxxxx Range, which consists mainly of Lower Paleozoic clastic sediments intruded by a large Cretaceous pluton, which forms the backbone of the Range. Topography descends to the south and east from a high point in the Dry Hills (northwest of Twin Creeks), with a typical gradient of 100 feet per mile. A blanket of matrix-supported alluvium also originates to the northwest, and thickens southeastward more rapidly than the regional topographic slope, reaching thicknesses of over 700 feet three miles to the south.
Physiography. The project area, ranging is elevation from about 3120 ft (951m) to 3240 ft (988m), is positioned on the southwest flanks of the broad, gentle relief Gila Valley or Safford Basin. The Pinaleno Mountains, located a short distance southwest of the valley, are the prominent topographic feature of the area, and rise abruptly to a high point of 10,720 ft (3267m) at Mt Xxxxxx. Broad alluvial fans, locally truncated by Quaternary fault scarps, xxxx the transition from steep mountain drainages to the valley floor. Project area terrain is dominated by a gentle relief veneer of xxxxx to small boulder outwash, overlying mostly thin bedded silty clays representing fine, basin fill lake sediments. Scattered, local, flat topped mesas, 1 to 200 ft (30 to 60m) in height, representing erosional remnants of large, down cut alluvial fans, xxxx the western edge of the property (Figure 6). Figure 6: Physiography of SE Arizona
