Eastern Mojave Vegetation Harvey Monroe Hall Natural Area, Mono County, California.
 
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See also: Mount Conness. Slate Creek.

See also: Slate Creek Basin. Slate Creek Valley. Timberline Station.

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Dr. H. M. Hall of the Carnegie Institution proposed that this research area be set aside in 1931. Forester R. Y. Stuart approved the classification as a Natural Area on January 6, 1933. The Forest Service and the Carnegie Institution executed an unprecedented Cooperative Agreement permitting the Institution to conduct scientific research including allowed changes in soil and vegetation cover ans structures, improvement and installations "required in the conduct of research." Under the agreement, the Carnegie Institution, based at their Timberline Experiment Station in the HRNA, conducted research there until 1971 or 1972. Principal research focused on genecology, using transplant experiments to analyze morphological changes in plant species grown at several elevations and latitudes. Some of the major California botanists cooperated in research at Timberline, notably the "Big Three," Jens C. Clausen, William H. Hiesey, and David D. Keck.

The HRNA encompasses about 3,883 acres (1571 ha) of alpine and subalpine plant communities on the crest of the Sierra Nevada, adjacent to Yosemite National Park. The area lies completely within the precipitous eastern escarpment of the range with a vertical relief od 2790 ft (850 m), from about 9800 ft (2987 m) at Slate Creek to 12,590 ft (3837 m) on the summit of Mt. Conness.

The HRNA is underlain by granitic and metamorphic rock: the substrate of the western two-thirds consists of Half Dome Quartz Monzonite and Cathedral Peak Quartz Monzonite and the eastern third is a complex of metamorphosed sedimentary and volcanic rocks of the Paleozoic Gull Lake Roof Pendant and Mesozoic Ritter Range Roof Pendant.

For plant collections made int the Harvey Monroe Hall Natural Area, see "Slate Creek Valley."

Latitude: 37.9602018 Longitude: -119.2984892 (° decimal)
Elevation: 10364ft, 3159m.

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Date and time this article was prepared:9:46:42 AM, 11/26/2014.