Subaqueous geology and a filling model for Crater Lake, Oregon

  title={Subaqueous geology and a filling model for Crater Lake, Oregon},
  author={Manuel Nathenson and Charles R. Bacon and David W. Ramsey},
Results of a detailed bathymetric survey of Crater Lake conducted in 2000, combined with previous results of submersible and dredge sampling, form the basis for a geologic map of the lake floor and a model for the filling of Crater Lake with water. The most prominent landforms beneath the surface of Crater Lake are andesite volcanoes that were active as the lake was filling with water, following caldera collapse during the climactic eruption of Mount Mazama 7700 cal. yr B.P. The Wizard Island… Expand
Eruptive history and geochronology of Mount Mazama and the Crater Lake region, Oregon
Geologic mapping, K-Ar, and 40 Ar/ 39 Ar age determinations, supplemented by paleomagnetic measurements and geochemical data, are used to quantify the Quaternary volcanic history of the Crater LakeExpand
Thermal, chemical, and optical properties of Crater Lake, Oregon
Crater Lake covers the floor of the Mount Mazama caldera that formed 7700 years ago. The lake has a surface area of 53 km2 and a maximum depth of 594 m. There is no outlet stream and surface inflowExpand
Evaporation and the hydrologic budget of Crater Lake, Oregon
The hydrologic budget of Crater Lake, Oregon is investigated by taking advantage of its relatively simple geometry, climatic circumstances, and the concurrent availability of many years ofExpand
Long-term limnological research and monitoring at Crater Lake, Oregon
Crater Lake is located in the caldera of Mount Mazama in Crater Lake National Park, Oregon. The lake has a surface area of about 53 km2at an elevation of 1882 m and a maximum depth of 594 m. LimitedExpand
Distribution and abundance of zooplankton populations in Crater Lake, Oregon
Although these observations provided considerable insight about the interannual variability of the zooplankton assemblages in Crater Lake, little was discovered about mechanisms behind the variability. Expand
Water balance and irrigation water pumping of Lake Merdada for potato farming in Dieng Highland, Indonesia
The modeled water balance in this research shows that groundwater is the dominant input and output of the lake and the actual irrigation water pumping plays the leading role as human-induced alteration of outflow discharge. Expand


Morphology, volcanism, and mass wasting in Crater Lake, Oregon
Crater Lake was surveyed nearly to its shoreline by high-resolution multibeam echo sounding in order to define its geologic history and provide an accurate base map for research and monitoringExpand
The volcanic, sedimentologic, and paleolimnologic history of the Crater Lake caldera floor, Oregon:Evidence for small caldera evolution
Apparent phreatic explosion craters, caldera-floor volcanic cones, and geothermal features outline a ring fracture zone along which Mount Mazama collapsed to form the Crater Lake caldera during itsExpand
The Glacial History of an Extinct Volcano, Crater Lake National Park
Alternating layers of lava and glacial material in the rim surrounding Crater Lake record the history of an intermittently active volcano on the slopes of which glaciers formed during periods ofExpand
Prodigious submarine landslides on the Hawaiian Ridge
The extensive area covered by major submarine mass wasting deposits on or near the Hawaiian Ridge has been delimited by systematic mapping of the Hawaiian exclusive economic zone using theExpand
On the terrestrial heat flow and physical limnology of Crater Lake, Oregon
The heat flow into 7000-year-old Crater Lake caldera is dominated by hydrothermal processes. The average of the conducted heat flow value is 138 +- 121 mW/m/sup 2/ (3.3 +- 2.9 HFU). The total heatExpand
Bacterial mats from Crater Lake, Oregon and their relationship to possible deep-lake hydrothermal venting
CRATER Lake is located in a caldera on Mt Mazama, a volcanic centre in the Oregon Cascades which has been active for more than 400,000 years1. The 594-m-deep lake is a consequence of a climacticExpand
Late holocene fluctuations of Mono Lake, eastern California
Abstract While long recognized as important sources of information on sub-millenial-to millenial-scale changes in climate, hydrographically closed lakes have seldom been used to illuminate pastExpand
Crater Lake, Oregon: A restricted basin with base-of-slope aprons of nonchannelized turbidites
The basin floor of Crater Lake (10-km diameter, 600-m water depth) is covered by up to 75 m of sediment–gravity-flow deposits interbedded with mud. In the upper units (8 m (thick), sand and gravelExpand
Hydrothermal fluid circulation through the sediment of Crater Lake, Oregon: Pore water and heat flow constraints
We present evidence for pore water flow through the sediment of Crater Lake, Oregon based on systematic variations in pore water chemical compositions and thermal gradients. Pore water was extractedExpand
Hydrology of Crater, East and Davis Lakes, Oregon; with section on Chemistry of the Lakes
E l Introduction 2 Purpose and scope 2 Acknowledgments 2 Location and brief description of the study areas_ _ 3 Crater Lake 5 Physiographic and geologic setting 5 Climate 10 Records of lake level 13Expand