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Optical Stratigraphy of a Wasatch fault trench wall and a Maritian surface using watershed-based segmentation Chaiwoot Boonyasiriwat Julie Willis Jerry.

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Presentation on theme: "Optical Stratigraphy of a Wasatch fault trench wall and a Maritian surface using watershed-based segmentation Chaiwoot Boonyasiriwat Julie Willis Jerry."— Presentation transcript:

1 Optical Stratigraphy of a Wasatch fault trench wall and a Maritian surface using 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 Pre-earthquake Earthquake 900 years later Development of a colluvial wedge  Motivation for digital trench wall logging

4 Mapleton, Utah “mega-trench”

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

6 10 cm

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18 Channel Deposit 2

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

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 2.8% < % < % < 0.2 Percent Rock Channel Deposits: 32 % Colluvial Wedge: 48 % Debris Flow: 42 %

25 Clast Orientation

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

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

28 Martian Surface

29 Clast Orientation Mars Statistics Eccentricity


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