Crater Lake


Crater Lake is a crater lake in south-central Oregon in the western United States. It is the main feature of Crater Lake National Park and is famous for its deep blue color and water clarity. The lake partly fills a nearly 2,148-foot (655 m)-deep caldera that was formed around 7,700 (± 150) years ago by the collapse of the volcano Mount Mazama. There are no rivers flowing into or out of the lake; the evaporation is compensated for by rain and snowfall at a rate such that the total amount of water is replaced every 250 years. With a depth of 1,949 feet (594 m), the lake is the deepest in the United States. In the world, it ranks ninth for maximum depth, and third for mean (average) depth.

Crater Lake
1908 Crater Lake, Oregon, Map, United States Geological Survey, Professional Paper No. 60, The Interpretation of Topographic Maps
Crater Lake
R.B. Marshall, Chief Geographer, T.G. Gerdine, Geographer in charge. Topography by Pearson Chapman, Control by Coast and Geodetic Survey, Pearson Chapman, and L.F. Biggs, Surveyed in 1908-1909, Soundings by Mark B. Kerr in 1886
Crater Lake
Panoramic View of the Crater Lake National Park
42°57'00.0"N 122°06'00.0"W

Lieu: Klamath County OR, USA

Scale: 1:62’500 (Map I & III)
Author: John H. Renshawe (Map III)
Publisher: United States Geological Survey
Collection: The University of Texas at Austin - Perry-Castañeda Library
Text: Wikipedia

Publié: Août 2018
Catégorie: Cartographie