Table S2
Data used for plate velocity diagrams and reconstructions for the North Pacific margin. M1 indicates stage poles from plate circuit
models of Engebretson et al. [1985], and M2 indicates stage poles from plate circuit models from Müller et al. [2008] as determined
by Dobrovine and Tarduno [2008]. Plate velocities and azimuth were calculated with the UNAVCO Plate Motion Calculator
[http://www.unavco.org/community_science/science-support/crustal_motion/dxdt/model.html] using the following user-definedstage
poles.
Triple Junction Location: Vancouver Island
Latitude and Longitude: 49.65°, -125.45°
Chron age span: 56.92 – 46.29 Ma
Time
Pole
Plate
Interval
Latitude
(Myr)
Kula-M1
10.63
-7.386
Pole
Longitude
Angle
(°)
Rotation Rate
(°/Myr)
311.085
-15.66
-1.473283161
Plate
Velocity
(mm/yr)
163.46
Azimuth
(°)
N Velocity
(mm/yr)
E Velocity
(mm/yr)
15.04
157.87
42.4
Kula-M2
10.63
-11.118
310.869
-13.57
-1.276481656
141.82
17.56
135.21
42.79
Farallon-M1
10.63
48.582
159.022
11.6
1.091063029
89.18
29.46
77.65
43.86
Farallon-M2
10.63
37.621
120.753
10.28
0.967074318
103.86
41.43
77.87
68.73
Pole
Longitude
Angle
(°)
Rotation Rate
(°/Myr)
Azimuth
(°)
N Velocity
(mm/yr)
E Velocity
(mm/yr)
296.215
-4.638
-0.946530612
Plate
Velocity
(mm/yr)
98.46
20.19
92.41
33.98
Triple Junction Location: Vancouver Island
Latitude and Longitude: 49.65°, -125.45°
Chron age span: 61.82 – 56.92 Ma
Time
Pole
Plate
Interval
Latitude
(Myr)
Kula-M1
4.9
3.265
Kula-M2
4.9
-0.034
301.924
-5.456
-1.113469388
119.79
17.6
114.19
36.22
Farallon-M1
4.9
33.405
116.806
5.19
1.059183673
116.05
41.48
86.94
76.87
Farallon-M2
4.9
32.449
112.68
5.479
1.118163265
123.36
43.8
89.03
85.39
Triple Junction Location: Alaska – British Columbia Border
Latitude and Longitude: 54.73°, -130.62°
Chron age span: 56.92 – 46.29 Ma
Time
Pole
Pole
Plate
Interval
Latitude
Longitude
(Myr)
Kula-M1
10.63
-7.386
311.085
Angle
(°)
Rotation Rate
(°/Myr)
-15.66
-1.473283161
Plate
Velocity
(mm/yr)
163.6
Azimuth
(°)
N Velocity
(mm/yr)
E Velocity
(mm/yr)
11.02
160.58
31.27
Kula-M2
10.63
-11.118
310.869
-13.57
-1.276481656
141.4
13.34
137.59
32.63
Farallon-M1
10.63
48.582
159.022
11.6
1.091063029
81.53
22.16
75.5
30.75
Farallon-M2
10.63
37.621
120.753
10.28
0.967074318
100.6
36.73
80.62
60.16
Angle
(°)
Rotation Rate
(°/Myr)
Azimuth
(°)
N Velocity
(mm/yr)
E Velocity
(mm/yr)
-4.638
-0.946530612
Plate
Velocity
(mm/yr)
101.1
17.36
96.5
30.16
Triple Junction Location: Alaska – British Columbia Border
Latitude and Longitude: 54.73°, -130.62°
Chron age span: 61.82 – 56.92 Ma
Time
Pole
Pole
Plate
Interval
Latitude
Longitude
(Myr)
Kula-M1
4.9
3.265
296.215
Kula-M2
4.9
-0.034
301.924
-5.456
-1.113469388
121.8
14.39
117.98
30.26
Farallon-M1
4.9
33.405
116.806
5.19
1.059183673
113.51
36.98
90.69
68.28
Farallon-M2
4.9
32.449
112.68
5.479
1.118163265
121.23
39.44
93.63
77.01
Triple Junction Location: Copper River
Latitude and Longitude: 60.35°, -144.98°
Chron age span: 56.92 – 46.29 Ma
Time
Pole
Plate
Interval
Latitude
(Myr)
Kula-M1
10.63
-7.386
Pole
Longitude
Angle
(°)
Rotation Rate
(°/Myr)
311.085
-15.66
-1.473283161
Plate
Velocity
(mm/yr)
161.38
Azimuth
(°)
N Velocity
(mm/yr)
E Velocity
(mm/yr)
358.43
161.32
-4.42
Kula-M2
10.63
-11.118
310.869
-13.57
-1.276481656
138.36
0.53
138.35
1.28
Farallon-M1
10.63
48.582
159.022
11.6
1.091063029
66.74
5.39
66.44
6.27
Farallon-M2
10.63
37.621
120.753
10.28
0.967074318
92.97
24.17
84.82
39.07
Pole
Longitude
Angle
(°)
Rotation Rate
(°/Myr)
Azimuth
(°)
N Velocity
(mm/yr)
E Velocity
(mm/yr)
296.215
-4.638
-0.946530612
Plate
Velocity
(mm/yr)
104.27
6.03
103.69
10.96
Triple Junction Location: Copper River
Latitude and Longitude: 60.35°, -144.98°
Chron age span: 61.82 – 56.92 Ma
Time
Pole
Plate
Interval
Latitude
(Myr)
Kula-M1
4.9
3.265
Kula-M2
4.9
-0.034
301.924
-5.456
-1.113469388
123.59
2.7
123.46
5.83
Farallon-M1
4.9
33.405
116.806
5.19
1.059183673
106.82
24.53
97.17
44.36
Farallon-M2
4.9
32.449
112.68
5.479
1.118163265
115.05
27.17
102.35
52.54