OxCal models used in Figure 2. Pole Patch Plot() { Sequence("Brigham City Pole Patch 12_2011") { Boundary("Sequence start"); Delta_R("MRT correction", 200, 200); R_Date("PP-1", 4190, 125); Boundary("Earthquake PP1"); Zero_Boundary("Zero boundary 1"); R_Date("PP-2", 2390, 100); Boundary("Sequence end historic constraint", 1847); }; }; Bowden Canyon Plot() { Sequence("Brigham City Bowden Canyon 12_2011") { Boundary("Sequence start "); C_Date("Bowden Canyon fan age estimate", -4500, 1500); Boundary("Earthquake BC4"); Zero_Boundary("zero boundary 1"); Delta_R("MRT correction1", 200, 200); Phase("Soil on post-EQ BC4 colluvium") { R_Date("BC-4", 4330, 70); R_Date("BC-8", 4340, 100); }; Boundary("Earthquake BC3"); Zero_Boundary("zero boundary 2"); Boundary("Earthquake BC2"); Delta_R("MRT correction2", 100, 100); R_Date("BC-5", 3430, 70); Zero_Boundary("zero boundary 3"); Boundary("Earthquake BC1"); Zero_Boundary("zero boundary 4"); Delta_R("MRT correction3", 0, 0); R_Date("BC-7", 1260, 60); Boundary("Sequence end historic constraint", 1847); }; }; Box Elder Delta Plot() { Sequence("Brigham City Box Elder delta 12_2011") { Boundary("Sequence start "); Delta_R("MRT correction", 200, 200); R_Date("B-68257", 5380, 80); Boundary("Earthquake BEW"); Zero_Boundary("Zero boundary 1"); C_Date("OTL-506", -3000, 1000); Boundary("Earthquake BEX"); Zero_Boundary("Zero boundary 2"); Phase("Soil on post-EQ BEX colluvium") { R_Date("B-54890", 3430, 60); R_Date("B-68255", 3320, 80); }; Boundary("Earthquake BEY"); R_Date("B-59101", 3160, 100); Phase("Soil on post-EQ BEY colluvium") { R_Date("B-68253", 2630, 90); R_Date("B-68258", 2580, 60); }; Boundary("Earthquake BEZ"); Zero_Boundary("Zero boundary 3"); R_Date("B-68254", 1720, 90); Boundary("Sequence end historic constraint", 1847); }; }; Hansen Canyon Plot() { Sequence("Brigham City Hansen Canyon 12_2011") { Boundary("sequence start"); Phase("pre-EQ HC1 soil on fan") { R_Date("HC-R1", 4410, 35); R_Date("HC-R8", 4200, 25); R_Date("HC-R7", 3840, 35); }; Boundary("Earthquake HC1"); Phase("Unit 1 debris flow") { R_Date("HC-R5", 2120, 35); R_Date("HC-R9", 725, 30); R_Date("HC-R6", 320, 60); }; Boundary("Sequence end historic constraint", 1847); }; }; Kotter Canyon Plot() { Sequence("Brigham City Kotter Canyon 12_2011") { Boundary("Start sequence"); C_Combine("Mean OSL fan age") { C_Date("KC-L3", -1900, 320); C_Date("KC-L1", -1595, 265); }; Boundary("Earthquake KC2"); Phase("Post-EQ KC2 soil") { R_Date("KC-R8", 3110, 40); R_Date("KC-R11", 2300, 120); }; Boundary("Earthquake KC1"); R_Date("KC-R4", 2400, 120); Phase("Unit 1 debris flow") { R_Date("KC-R6", 530, 30); R_Date("KC-R7", 340, 30); }; Boundary("Sequence end historic constraint", 1847); }; }; Pearsons Canyon Plot() { Sequence("Brigham City Pearsons Canyon 12_2011") { Boundary("start sequence"); Phase("Pre-EQ PC1 soil on fan") { R_Date("PCN-R8", 2110, 65); R_Date("PCN-R4", 1810, 30); R_Date("PCN-R9", 1280, 30); }; Boundary("Earthquake PC1"); Phase("Post-EQ PC1 colluvium") { R_Date("PCN-R7", 1320, 25); R_Date("PCN-R2", 1270, 30); R_Date("PCN-R6a", 795, 30); }; Boundary("Sequence end historic constraint", 1847); }; };