chaiwoot boonyasiriwat julie willis jerry schuster chris duross
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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 Schuster Chris Duross. Motivation for digital trench wall logging Algorithm for separating rocks from fill Statistics Mars. - PowerPoint PPT PresentationTRANSCRIPT
Optical Stratigraphy of a Wasatch fault trench wall
and a Maritian surface using watershed-based segmentation
Chaiwoot BoonyasiriwatJulie Willis
Jerry SchusterChris Duross
Motivation for digital trench wall logging Algorithm for separating rocks from fill Statistics Mars
Pre-earthquake
Earthquake
900 years later
Development of a colluvial wedge
Motivation for digital
trench wall logging
Mapleton, Utah
“mega-trench”
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
ChannelDeposit
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
10 cm
Channel Deposit 2
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
ChannelDeposit
Colluvial Wedge 1
Orientation? Eccentricity? Percent Rock?
Colluvial Wedge 3
Orientation? Eccentricity? Percent Rock?
Debris Flow 1
Orientation? Eccentricity? Percent Rock?
Channel Deposit 1
Orientation? Eccentricity? Percent Rock?
Eccentricity
2.8% < 0.2
12.5% < 0.2
2.5% < 0.2
Percent Rock
Channel Deposits: 32 %
Colluvial Wedge: 48 %
Debris Flow: 42 %
Clast Orientation
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
ChannelDeposit
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
ChannelDeposit
? ?
?
?
Martian Surface
Clast Orientation
Mars Statistics
Eccentricity