Investigator’s Annual Reports (IAR’s) for Crater Lake National Park
Volcanic Evolution of the Crater Lake Region
Report Number: 12762
Reporting Year: 1995
Permit Number: CRLA1995AOLM
Date Received: Jan 01, 1998
Principal Investigator: Charles Bacon, U.S. Geological Survey, Menlo park, CA
Park-assigned Study Id. # CRLA1995AOLM
Permit Expiration Date: Jan 01, 1998
Permit Start Date: Jan 01, 1998
Study Starting Date: Jan 01, 1995
Study Ending Date: Jan 01, 1995
Study Status: Completed
Activity Type: Other
Subject/Discipline: Geology / General
Objectives: To document the growth and evolution of Mount Mazama, the volcanic complex in which Crater Lake caldera lies, in order to define processes that led to an accumulation of a large volume of silicic magma in the upper crust. Secondary goals are to further knowledge of catastrophic eruptions, such as the one that resulted in the collapse of the caldera.
Findings and Status: Work continues on preparation of the 1:24,000 scale geologic map for publication. Drafts of all eleven geologic panoramas of the caldera walls have been completed and are being scanned. These will be published in color along with the geologic map. Two weeks were spent in the field checking the geology of the caldera walls and collecting additional rock samples to verify correlations and identification of map units. In cooperation with USGS colleagues at the Cascades Volcano Observatory, work was begun on a volcano hazards assessment of the Crater Lake area. A paper on primitiv lavas in five Cascade volcanic centers, one of which is Crater Lake, was submitted for publication. ;Field work in 1995 clarified many stratigraphic relationships amoung the lavas from different volcanic centers that make up Mount Mazama. Lava flows and pyrroclastic rocks from five to ten sources can be found in any one caldera wall section. These can be correlated around the caldera and matched with exposures on the flanks of Mount Mazama. Compilation of our K-Ar 40Ar/39Ar dates of lava flows that are offset along the major north-south normal fault that goes through Annie springs indicate a long-term average vertical displacement rate along this fault of 0.3mm/yr, down-to-the-east, for the last 300,000 years. This fault is part of the same system that bounds the west side of the Klamath graben (basin) and connects with epicental area of the September, 1993, “Klamath Falls” magnitude 6 earthquakes.
For this study, were one or more specimens collected and removed from the park but not destroyed during analyses?
Funding provided this reporting year by NPS: 0
Funding provided this reporting year by other sources: 0
Full name of college or university: n/a
Annual funding provided by NPS to university or college this reporting year: 0
Other pages in this section
- Index – Principal Investigators
- Index – Research Projects By Year
- 12685 – Botrychium pumicola Annual Inventory
- 12686 – Dutton Ridge Air Visibility Monitoring
- 12687 – Spotted Owl Inventory, Crater Lake National Park
- 12688 – Departure Analysis
- 12689 – Magma Chamber Evolution of Cascade Volcanoes
- 12690 – Plant materials for Crater Lake National Park Revegetation Project
- 12691 – Volcanic evolution of the Crater Lake Region
- 12692 – Tree Section Collection
- 12693 – Fire Monitoring Plots
- 12694 – RAWS Installation
- 12695 – Origin of the Magma Chamber Under Mount Mazama
- 12696 – Trail impact monitoring
- 12697 – North American Truffling Society Foray
- 12698 – Establishment and Defense of the Cascade Range Forest Reserve
- 12699 – Fine Particulate Monitoring
- 12700 – Volcanic Breccias: Evaluation of Fragment and Deposit Origins
- 12701 – Developing a Resource Database for Crater Lake
- 12702 – U.S. Geological Survey-Hydrologic Benchmark Station
- 12703 – Visibility Monitoring
- 12704 – Treespade Transplanting Trails
- 12705 – A survey of the aquatic macroinvertebrates
- 12706 – Ecology of kokanee salmon and rainbow trout
- 12707 – Limnological Studies of Crater Lake
- 12708 – Particle fluxes in Crater lake and their relationship to nutrient cycling
- 12709 – Studies of hydrothermal processes in Crater Lake, Oregon
- 12710 – Effects of Climate on Physical and Chemical Characteristics of Crater Lake
- 12711- Collection of Representative Rocks from Crater Lake
- 12712 – Research Spotted Owl Distribution
- 12713 – What Price Expansion? Dams Versus the National Park Concept
- 12714 – Administrative History of John Day Fossil Beds National Monument
- 12715 – Plant Materials for Crater Lake National Park Revegetation Project
- 12716 – Volcanic Breccias: Evaluation
- 12717 – Reserved Water Rights Claim Preparation for the Klamath Basin Adjudication
- 12718 – Fine Particulate Monitoring. NPS Contract Number CX0001-8-0017
- 12719 – A Proposed Gas-Volcanic Solution To the Crater Lake, Oregon Collapse Structure
- 12720 – Volcanic Evolution of the Crater Lake Region
- 12721 – Bull Trout Restoration in Crater Lake National Park, Oregon
- 12722 – Ecology of Kokanee Salmon and Rainbow Trout
- 12723 – Fungi Inventory of Crater Lake National Park
- 12724 – Hydrologic Studies
- 12725 – Limnological Studies of Crater Lake
- 12726 – Crater Lake National Park 10-year Limnological Studies Final Report
- 12727 – A Population Survey for the Rare Sedge Carex Whitneyi at Crater Lake National Park
- 12728 – National Benchmark Station
- 12729 – PSD Increment Tracking
- 12730 – Prescribed Fire
- 12731 – Fire Monitoring Plots
- 12732 – Hazardous Fuel Pile and Burn
- 12733 – Preparation for Klamath River Basin Adjudication
- 12734 – Volcanic Evolution of the Crater Lake Region
- 12735 – Fine Particulate Monitoring
- 12736 – Plant Materials for Crater Lake National Park Revegetation Project
- 12737 – Ecology of Kokanee Salmon and Rainbow Trout in Crater Lake, Oregon
- 12738 – Bull Trout Restoration in Crater Lake National Park, Oregon
- 12739 – Amphibian Survey in Crater Lake National Park
- 12740 – Longterm Limnological Monitoring
- 12741 – A population survey for the rare sedge Carex whitneyi at Crater Lake National Park
- 12742 – National Benchmark Station, Collection of Basic Records
- 12743 – PSD Increment tracking
- 12744 – Prescribed Fire
- 12745 – Fire Monitoring Plots
- 12746 – Hazardous Fuel Pile and Burn
- 12747 – Preparation for Klamath River Basin Adjudication
- 12748 – Volcanic Evolution of the Crater Lake Region
- 12749 – Fine Particulate Monitoring. NPS Contract Number CX0001-8-0017
- 12750 – Plant Materials for Crater Lake National Park Revegetation Project
- 12751 – Ecology of Kokanee Salmon and Rainbow Trout in Crater Lake, Oregon
- 12752 – Bull Trout Restoration in Crater Lake National Park, Oregon
- 12753 – Amphibian Survey in Crater Lake National Park
- 12754 – Longterm Limnological Monitoring
- 12755 – Conservation Biology of the Mt. Mazama Collomia
- 12756 – Checklist of Plants of Crater Lake National Park
- 12757 – Spotted Owl Inventory
- 12758 – Crater Lake National Park Vegetation Mapping
- 12759 – Fire Monitoring Plots
- 12760 – Hazardous Fuel Pile and Burn
- 12761 – Prescribed Fire
- 12763 – Spotted Owl Inventory
- 12764 – Conservation Biology of the Mt. Mazama Collomia
- 12765 – Amphibian Survey in Crater Lake National Park
- 12766 – Bull Trout Restoration in Crater Lake National Park, Oregon
- 12767 – Ecology of Kokanee Salmon and Rainbow Trout in Crater Lake, Oregon
- 12768 – Fine Particulate Monitoring. NPS Contract Number CX0001-8-0017
- 12769 – Crater Lake National Park Vegetation Mapping
- 12770 – PSD Increment tracking
- 12771 – Plant Materials for Crater Lake National Park Revegetation Project
- 12772 – Longterm Limnological Monitoring
- 12773 – Botrychium pumicola Annual Inventory
- 12774 – National Benchmark Station, Collection of Basic Records
- 12775 – A population survey for the rare sedge Carex whitneyi at Crater Lake National Park
- 12776 – Checklist of Plants of Crater Lake National Park
- 12777 – Fire Monitoring Plots
- 12778 – Hazardous Fuel Pile and Burn
- 12779 – Management Ignited Fire
- 12780 – Volcanic Evolution of the Crater Lake Region
- 12781 – Restoration Strategies for Collomia mazama-Phase II
- 12782 – Conservation Biology of the Mt. Mazama Collomia
- 12783 – Bull Trout Restoration in Crater Lake National Park, Oregon
- 12784 – Ecology of Kokanee Salmon and Rainbow Trout in Crater Lake, Oregon
- 12785 – Fine Particulate Monitoring. NPS Contract Number CX0001-8-0017
- 12786 – Crater Lake National Park Vegetation Mapping
- 12787 – Survey of the hydra (coelenterata) in Crater Lake
- 12788 – Climate Change and Lower Food Web Structure in Lake Ecosystems
- 12789 – PSD Increment tracking
- 12790 – Federal Highway Admin HQ-Rim Revegetation Project
- 12791- Revegetation Lodge Landscape
- 12792 – Ecology of Pumice Desert
- 12793 – Longterm Limnological Monitoring
- 12794 – Crater Lake Tributaries Flow Assessment
- 12795 – Northern Spotted Owl Inventory
- 12796 – Botrychium pumicola Monitoring Project at Llao Rock (5th year)
- 12797 – Preparation for Klamath River Basin Adjudication
- 12798 – National Benchmark Station, Collection of Basic Records
- 12799 – Hydrothermal Convection in Cascade Volcanoes-Magma Migration in Cascade Volcanoes
- 12800 – Phylogenetics and Speciation in a Daphnia pulex Species Complex
- 12801 – Restoration strategies for Collomia mazama – phase II
- 12802 – The use of camera bait stations to detect fisher and wolverine in Crater Lake National Park
- 12803 – Fire Monitoring Plots
- 12804 – Ecology of Kokanee Salmon and Rainbow Trout in Crater Lake, Oregon
- 12785 – Fine Particulate Monitoring. NPS Contract Number CX0001-8-0017
- 12786 – Crater Lake National Park Vegetation Mapping
- 12787 – Survey of the hydra (coelenterata) in Crater Lake
- 12788 – Climate Change and Lower Food Web Structure in Lake Ecosystems
- 12789 – PSD Increment tracking
- 12790 – Federal Highway Admin HQ-Rim Revegetation Project
- 12791 – Revegetation Lodge Landscape
- 12792 – Ecology of Pumice Desert
- 12793 – Longterm Limnological Monitoring
- 12794 – Crater Lake Tributaries Flow Assessment
- 12795 – Northern Spotted Owl Inventory
- 12796 – Botrychium pumicola Monitoring Project at Llao Rock (5th year)
- 12797 – Preparation for Klamath River Basin Adjudication
- 12798 – National Benchmark Station, Collection of Basic Records
- 12799 – Hydrothermal Convection in Cascade Volcanoes-Magma Migration in Cascade Volcanoes
- 12800 – Phylogenetics and Speciation in a Daphnia pulex Species Complex
- 12801 – Restoration strategies for Collomia mazama – phase II
- 12802 – The use of camera bait stations to detect fisher and wolverine in Crater Lake National Park
- 12803 – Fire Monitoring Plots
- 12804 – Hazardous Fuel Pile and Burn
- 12805 – Management Ignited Fire
- 12806 – Volcanic Evolution of the Crater Lake Region
- 12807 – Restoration Strategies for Collomia mazama-Phase II
- 12808 – Ecology of Asarum species
- 12809 – Physical Characteristics of the Cleetwood Air-fall Tephra
- 12810 – Conservation Biology of the Mt. Mazama Collomia
- 12811 – Bull Trout Restoration in Crater Lake National Park, Oregon
- 12812 – Ecology of Kokanee Salmon and Rainbow Trout in Crater Lake, Oregon
- 12813 – Fine Particulate Monitoring. NPS Contract Number CX0001-8-0017
- 12814 – Crater Lake National Park Vegetation Mapping
- 12815 – Survey of the hydra (coelenterata) in Crater Lake
- 12816 – Climate Change and Lower Food Web Structure in Lake Ecosystems
- 12817 – Federal Highway Admin HQ-Rim Revegetation Project
- 12818 – Revegetation Lodge Landscape
- 12819 – Potential for hybridization and gene flow in an isolated population of Penstemon (Scrophulariaceae)
- 12820 – Nutrient study of Crater Lake
- 12821 – Ecology of Pumice Desert
- 12822 – Survey of Freshwater Ostracoda (Crustacea) in Crater Lake National Park
- 12823 – 1997 EMAP Oregon Pilot Survey
- 12824 – Longterm Limnological Monitoring
- 12825 – Crater Lake Tributaries Flow Assessment
- 12826 – Archeological Excavation of Bear Creek Cave
- 12827 – Survey Fort Klamath-Union Creek military wagon road within boundaries of Park
- 12828 – Botrychium pumicola Monitoring Project at Llao Rock (5th year)
- 12829 – Preparation for Klamath River Basin Adjudication
- 12830 – National Benchmark Station, Collection of Basic Records
- 12831 – Northern Spotted Owl Inventory
- 12832 – Scenic Images of Crater Lake National Park: A Focus Group Analysis
- 12833 – Hydrothermal Convection in Cascade Volcanoes-Magma Migration in Cascade Volcanoes
- 12834 – Phylogenetics and Speciation in a Daphnia pulex Species Complex
- 12835 – Hybridization in an isolated population: an example from Penstemon (Scrophulariaceae)
- 12836 – FIA/FHM Inventory of eastern Oregon’s timberlands
- 12837 – Educational Research for Elementary School Science
- 12838 – Trace element partitioning coefficients for feldspar in high-silica rhyolite
- 12839 – Volcanic Evolution of the Crater Lake Region
- 12840 – Restoration Strategies for Collomia mazama-Phase II
- 12841 – Inventory of Native Bumblebees of Crater Lake
- 12842 – Source constraints for growth of continental arcs based on Re-Os isotope fractionation
- 12843 – Bull Trout Restoration in Crater Lake National Park, Oregon
- 12844 – Inventory of Native Bumblebees of Crater Lake
- 12845 – Magma migration and Hydrothermal Convection in High Cascade volcanoes
- 12846 – Volcanic Evolution of the Crater Lake Region
- 12847 – Stable Isotopic Study of Sulfur Degassing during the Eruption of Mt. Mazama
- 12848 – Examination of the factors promoting hybridization between Penstemon davidsonii and P. rupicola
- 12849 – Soil Survey of Crater Lake National Park
- 12850 – Multi-spectral Thermal Imager (MTI)
- 20572 – Calibration of the (U-Th)/He geochronometer by analysis of the Mt. Mazama ash flow
- 20805 – USEPA’s Environmental Monitoring and Assessment Program (EMAP)
- 21365 – Conduit processes of the Cleetwood eruption, inferred from textural, petrologic, and water content analyses
- 21726 – Forestry inventory and Analysis
- 21728 – Seasonal effects of prescribed fire at Crater lake
- 22081 – Transport of Asiatic Aerosols into Crater Lake National Park
- 22333 – Assessment of Sensitive Amphibians in Southwest Oregon (State – Federal Partnership)
- 23891 – The Generation of Post-Caldera Rhyodacite in Crater Lake, Oregon
- 24578 – Ecology of the Pumice Desert
- 24750 – Inventory of Amphibians and Reptiles Klamath Parks Network Inventory and Monitoring Program
- 24831 – Forestry inventory and Analysis
- 24892 – Territorial Interactions Between Species of Corvids
- 25031 – Intercontinental Transport and Chemical Transformation Experiment (ITCT)
- 25854 – Fire History of Whitebark Pine Forests Crater Lake, Mount Rainier, and North Cascades National Parks
- 26142 – Effects of Prescribed Burning on Mycorrhizal Fungi in Crater Lake National Park
- 27032 – Intercontinental Transport and Chemical Transformation Experiment (ITCT)
- 27732 – Small Mammal Inventories in Klamath Network
- 28174 – The role of western dwarf mistletoe in fire susceptibility and behavior in mature ponderosa pine stands
- 28176 – The role of western dwarf mistletoe in fire susceptibility and behavior in mature ponderosa pine stands
- 28845 – Forestry inventory and Analysis
- 28949 – Seasonal Effects of Prescribed Fire on Ponderosa Pine
- 29581 – Soil Characterization for 2006 International Soil Science Society
- 29629 – REVSYS: A Holistic Approach to a Holarctic Group
- 29969 – Effects of Prescribed Burning on Mycorrhizal Fungi in Crater Lake National Park
- 30792 – Distribution and abundance of bat species in Crater Lake and others
- 31048 – Crater Lake NP Winter Wolverine Survey 2004 – 2005
- 32052 – Bryophyte Survey and Inventory in the Crater Lake Caldera
- 32134 – The role of western dwarf mistletoe in fire susceptibility and behavior in mature ponderosa pine stands
- 32344 – Patterns and consequences of insect herbivory in Lupinus lepidus at Crater Lake National Park
- 32739 – Intercontinental Transport and Chemical Transformation Experiment (ITCT)
- 33788 – Spatial, Temporal and Depth Distribution of Snow Properties in the Crater Lake Snowpack
- 34486 – Forest Inventory and Analysis
- 35198 – Crater Lake NP Winter Wolverine Survey 2004 – 2005
- 35203 – Fire History of Whitebark Pine Forests Crater Lake, Mount Rainier, and North Cascades National Parks
- 35760 – Distribution and relative abundance of bat species in Crater Lake National Park and others
- 35832 – Western Airborne Contaminants Assessment Project
- 35873 – 2005 Crater Lake NP Rangeland Ecological Site Description Data Collection
- 35944 – The Evolution of Reproductive Isolation in Mimulus
- 36142 – Evolution of color patterns in garter snakes
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