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Table 4

Synthesis of terrace level ages, from this study and literature.

Terrace level Median elevation above current river (m) Published age Method Reference This study Conclusions/Adopted age
A         TARA0: 4731 ± 1447 ka (P-PINI) 2800 ± 700 Ma
  210 (Zaragoza area)       TARA2: 2215 ± 778 ka (P-PINI)  
  130 (Aragón) Mean*: 2780 ± 690 ka  
B 150–180 (North-East) 1276 ± 104 ka ESR Duval et al., 2017 TALC1: 5016 ± 1702 ka (P-PINI) 1150 ± 150 ka†
  140 (Ebro between Zaragoza and Aragón) [999–1070] ka Tentative age from paleomagnetic data Lewis et al., 2017 TEBR2: 1034 ± 275 ka (P-PINI)  
  90 (Aragón) > 780 ka Paleomagnetism Lewis et al., 2017 TOJA1: 957 ± 161 ka (P-PINI)  
  200 (Upper Ebro)       TSEG2: [489–1104] ka (profile)  
          Mean*: 970 ± 130 ka  
C 140 (North-East) 817 ± 68 ka ESR Duval et al., 2017   850 ± 70 ka‡
  130 (Gállego) [780–999] ka Tentative age from paleomagnetic data Lewis et al., 2017    
  115 (Ebro between Zaragoza and Aragón) > 780 ka Paleomagnetism Lewis et al., 2017    
  170 (Upper Ebro)          
D 100 (North-East) < 780 ka Paleomagnetism Lewis et al., 2017 TSEG1: [523–971] ka (profile) 650 ± 130 ka◊
  100 (Gállego) ∼ 780 ka Paleomagnetism Calle et al., 2013    
  80 (Ebro downstream Zaragoza)          
  90 (Ebro between Zaragoza and Aragón)          
  130 (Upper Ebro)          
E 80 (North-East) 401 ± 117 ka Compilation of various data Lewis et al., 2017   400 ± 120
  70 (Gállego)          
  50 (Ebro between Zaragoza and Aragón)          
  35–40 (Aragón)          

* Inverse weighted average; when age range, we suppose a normal distribution. † With or without related karst data, average ∼ 1150 ka; an uncertainty of 150 ka satisfactorily encompasses the various estimates. ‡ Average with uncertainty encompassing the various estimates. ◊ Value satisfying both paleomagnetic constraints and the age estimates for C and E.

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