Crater Lake

Crater Lake

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Caption: Crater Lake. Coloured three-dimensional shaded- relief water depth map of Crater Lake, Oregon, which lies in a volcanic crater, or caldera. The map was created from over 50 million sonar depth readings. At 608 metres, this is the deepest US lake. North is at top. Land is grey, with water depth colour-coded from pink (deepest), through blue, green and yellow to red (shallowest). Three volcanic cones are seen: Wizard Island (grey, cen- tre left), Rhyodacite Dome (red, centre left) and Merriam Cone (upper right). The caldera formed wh- en the volcano Mount Mazama blew itself apart 7700 years ago. The lake water comes from rain and snow rather than rivers. Data collected from July 2000.

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Keywords: 3-d, american, basin, bathymetry, caldera, crater lake, gemomorphology, geography, geological survey, geology, merriam cone, mount mazama, oregon, rhyodacite dome, shaded-relief, sonar, three-dimensional, united states, usa, usgs, volcanic, volcano, volcanology, vulcanology, water depth map, wizard island

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