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REVIEW OF LITERATURE: Previous Work on Cinder Cones Steve Taylor

REVIEW OF LITERATURE: Previous Work on Cinder Cones Steve Taylor. Single Cone DEM Example. Composite Cone DEM Example. (n = 182). COMPOSITE. (n = 165). Taylor and Templeton, 2007. Taylor and Templeton, 2007. Taylor and Templeton, 2007.

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REVIEW OF LITERATURE: Previous Work on Cinder Cones Steve Taylor

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  1. REVIEW OF LITERATURE: Previous Work on Cinder Cones Steve Taylor

  2. Single Cone DEM Example Composite ConeDEM Example (n = 182) COMPOSITE (n = 165)

  3. Taylor and Templeton, 2007

  4. Taylor and Templeton, 2007

  5. Taylor and Templeton, 2007

  6. Cone lineaments anyone? Question: How many lines can be created by connecting the dots between 296 select cone center points?

  7. Answer: Total Lines = [n(n-1)]/2 = [296*295]/2 = 43,660 possible line combinations Follow-up Question: Which cone lineaments are due to random chance and which are statistically and geologically significant? Taylor and Templeton, 2007

  8. ES407 RESEARCH QUESTIONS REVISITED Are there morphologic groupings of ~400 cinder cones at Newberry? Can they be quantitatively documented? Are morphologic groupings associated with age and state of erosional degradation? Have cone morphologies been modified by post-emplacement glaciation (USGS, 2010)? Are there spatial alignment patterns? Can they be statistically documented? Do regional stress fields and fault mechanics control the emplacement of cinder cones at Newberry volcano?

  9. CINDER CONE DEGRADATION MODELS: CONE MORPHOLOGY AND EROSION OVER TIME Dan Dziekan and Rick Fletcher

  10. Cinder Cone Degradation Over Time • Primary Cone Shape • Angle of Repose ~33o • Cone Height Decrease • Cone Slope Decrease • Increased Drainage Density Time Valentine et al., 2006

  11. Cima Volanic Field – Dated Cones • Increase Ages • Increase Apron Area • Decrease Slope • Increased Drainage Dohrenwend et al., 1986

  12. STRUCTURAL CONTROLS ON CINDER CONE EMPLACEMENT Jody Becker

  13. Magma Ascent Via Fault-Related Plumbing Newberry: Junction of Tumalo-Brothers-Walker Rim Fault Zones Rooney et al., 2011

  14. Rear-Arc Cinder Cone Emplacement Model Strong and Wolff, 2003

  15. Cinder Cone Emplacement

  16. ANALYSIS OF CINDER CONE ALIGNMENT PATTERNS Bill Vreeland

  17. Answer: Total Lines = [n(n-1)]/2 = [296*295]/2 = 43,660 possible line combinations Follow-up Question: Which cone lineaments are due to random chance and which are statistically and geologically significant?

  18. Lutz (1986) Two-Point Azimuth Method

  19. Azimuth methods (Lutz 1986) Strip methods (Zhang and Lutz 1989) Taylor and Templeton, 2007

  20. Cebria et al. (2011) Method Calatrava Spain: Lines < 5 km Guanajuato Mexico: lines < 12 km Select lines shorter than one third of one standard deviation below mean

  21. Cebria et al. (2011) Method Random Lineaments skewness 0.26

  22. LIDAR METHODS: Airborne Laser-Swath Altimetry Kelsii Dana

  23. LIDAR Data Measurement • LIDAR: Light Detection and Ranging • Laser apparatus sends pulses to surface • Laser reflected: travel time and distance determined using speed of light Laser Pulse Reflection First Return Last Return

  24. LIDAR Data Measurement • LIDAR Reflected Signals • First Returns: Vegetation and Cultural Features • Last Returns: Bare Earth

  25. Oregon LIDAR Consortium • Goal: to provide high quality LIDAR data for the state • Formed in 2007 by Oregon Dept. of Geology and Mineral Industries (DOGAMI), data collected since 2003 • Newberry LIDAR Funded by USGS, collected in 2010

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