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Chaiwoot Boonyasiriwat Julie Willis Jerry Schuster Chris Duross

Optical Stratigraphy of a Wasatch fault trench wall and a Maritian surface using watershed-based segmentation. Chaiwoot Boonyasiriwat Julie Willis Jerry Schuster Chris Duross. Motivation for digital trench wall logging Algorithm for separating rocks from fill Statistics Mars.

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Chaiwoot Boonyasiriwat Julie Willis Jerry Schuster Chris Duross

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  1. Optical Stratigraphyof a Wasatch fault trench wall and a Maritian surfaceusing watershed-based segmentation Chaiwoot Boonyasiriwat Julie Willis Jerry Schuster Chris Duross

  2. Motivation for digital trench wall logging • Algorithm for separating rocks from fill • Statistics • Mars

  3. Motivation for digital trench wall logging Development of a colluvial wedge Pre-earthquake Earthquake 900 years later

  4. Mapleton, Utah “mega-trench”

  5. Mapleton Trench Level 1 Colluvial Wedge Channel Deposit 1 meter 1 meter Debris Flow 1 m • Develop a rock segmentation algorithm to separate clasts from matrix. • Determine whether colluvial wedges, debris flows and channel deposits can be statistically differentiated.

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  18. Channel Deposit 2

  19. Mapleton Trench Level 1 Colluvial Wedge Channel Deposit 1 meter Debris Flow 1 m • Algorithm successfully separates rocks from fill – 80% accuracy. • Can colluvial wedges, debris flows and channel deposits be statistically differentiated? Compare: Orientation, Eccentricity, Percent Rock

  20. Colluvial Wedge 1 Orientation? Eccentricity? Percent Rock?

  21. Colluvial Wedge 3 Orientation? Eccentricity? Percent Rock?

  22. Debris Flow 1 Orientation? Eccentricity? Percent Rock?

  23. Channel Deposit 1 Orientation? Eccentricity? Percent Rock?

  24. Eccentricity 12.5% < 0.2 2.5% < 0.2 2.8% < 0.2 Channel Deposits: 32 % Colluvial Wedge: 48 % Debris Flow: 42 % Percent Rock

  25. Clast Orientation

  26. Mapleton Trench Level 1 Colluvial Wedge Channel Deposit 1 meter Debris Flow 1 m Can colluvial wedges, debris flows and channel deposits be statistically differentiated? Orientation – Colluvial Wedge Eccentricity, Percent Rock – Channel Deposits

  27. Mapleton Trench Level 1 ? Colluvial Wedge ? ? Channel Deposit 1 meter ? Debris Flow 1 m Future work: • Use the segmentation algorithm to objectively log trench walls and build data for more rigorous statistics • Mars and beyond . . .

  28. Martian Surface

  29. Mars Statistics Eccentricity Clast Orientation

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