Table 3

Scarps from GPR profiles: location, feature type and approximate age.

PROFILE DIRECTION FEATURE DISTANCE (m) UTM EAST UTM NORTH SEQUENCE Age (~ka) NOTES
                 
MOCL1R1 West to East SBRS 110 407936 5232461 A 0.3 Retreat scarp (A) preserved in sea-cliff inset.
COPR1R1 West to East LBRS 210 410673 5218527 A 0.3  
COPR1R1   FDDZ 310 410773 5218527 C 1.3  
COPR1R1   BWCP 430 410893 5218529      
RVDUNE West to East LBRS 240 410750 5217740 A 0.3  
RVDUNE   SBRS 340 410850 5217732 C 1.3  
RVDUNE     360 410870 5217733      
CONN1R1 West to East BSDZ 310 411228 5213711 Historic 0.1 Possible creek-channel migration features.
CONN1R1   BSDZ 370 411287 5213719 Historic 0.1  
CONN1R1   BSDZ 390 411307 5213721 Historic 0.1  
CONN1R1   BSDZ 440 411357 5213725 Historic 0.1  
CASI1R1 West to East BSDZ 130 411580 5210005 Historic 0.1  
CASI1R2 West to East LBRS 180 411793 5210029 A 0.3  
CASI1R2   SBRS 280 411892 5210027 C 1.3  
CASI1R2   LBRS 340 411952 5210027 D 1.7  
CASI1R2   BWCP 410 412021 5210029      
OCSP1R1 West to East BSDZ 70 411410 5209427 Historic 0.1  
OCSP1R1   BSDZ 90 411430 5209427 Historic 0.1  
OCSP1R2 West to East BSDZ 20 411563 5209515 Historic 0.1  
OCSP1R2   BSDZ 100 411643 5209516 Historic 0.1  
OCSP1R2   LBRS 320 411863 5209515 A 0.3  
OCSP1R2   SBRS 360 411896 5209495 B 1.1  
OHYU1R1 West to East BSDZ 90 411015 5207770 Historic 0.1  
OHYU1R1   BSDZ 290 411215 5207768 Historic 0.1  
OHYU1R1   BSDZ 420 411345 5207764 Historic 0.1  
OHYU1R1   BSDZ 690 411615 5207756 Historic 0.1  
OHYU1R1   BSDZ 800 411724 5207753 Historic 0.1  
OHYU1R1   LBRS 1220 412144 5207742 A 0.3  
OHYU1R1   SBRS 1250 412174 5207742 B 1.1  
OHYU1R1   SBRS 1340 412264 5207740 C 1.3  
OHYU1R1   LBRS 1380 412304 5207738 D 1.7  
OHYU1R1   LBRS 1560 412476 5207690 E 2.5  
OHYU1R1   LBRS 1590 412505 5207683 F 2.8  
OHYU1R1   BWCP 1600 412515 5207681      
OHYU1R1   LBRS 1630 412543 5207672 G 3.2  
SRAIN1R1 East to West LBRS 670 412110 5207217 A 0.3  
SRAIN1R1   SBRS 630 412150 5207215 B 1.1  
SRAIN1R1   SBFS 510 412270 5207209 C 1.3  
SRAIN1R1   LBRS 350 412430 5207203 D 1.7  
SRAIN1R1   LBRS 210 412569 5207195 E 2.5  
SRAIN1R1   LBRS 120 412640 5207143 F 2.8  
SRAIN1R1   BSDZ 80 412677 5207129 G 3.2  
LAMAR1R1 East to West BSDZ 480 411723 5206653 Historic 0.1  
LAMAR1R1   BSDZ 420 411783 5206655 Historic 0.1  
LAMAR1R1   BSDZ 250 411953 5206658 Historic 0.1  
LAMAR1R1   LBRS 90 412113 5206665 A 0.3  
LAMAR1R1   SBRS 30 412173 5206666 B 1.1  
ALBAT1R1 East to West LBRS 70 412901 5205677 E 2.5  
WEST1R1 West to East BSDZ 150 414435 5192560 Historic 0.1  
WEST1R1   BSDZ 310 414595 5192562 Historic 0.1  
WEST1R1   BSDZ 480 414764 5192565 Historic 0.1  
WEST1R1   LBRS 610 414894 5192567 A 0.3  
WEST1R1   LBRS 670 414954 5192565 B 1.1  
WEST1R1   SBRS 950 415234 5192564 C 1.3  
WEST1R2 West to East BSDZ 1190 415495 5192678 Unidentified    
WEST1R2   LBRS 1250 415557 5192684 D 1.7  
WEST1R2   SBRS 1370 415681 5192680 E 2.5  
WEST1R2   LBRS 1470 415784 5192680 F 2.8  
TWIN1R2 West to East LBRS 210 415336 5190076 A 0.3  
TWIN1R2   SBRS 240 415366 5190076 B 1.1  
TWIN1R2   BSDZ 530 415670 5190070 C 1.3  
TWIN1R2   LBRS 680 415820 5190071 D 1.7  
TWIN1R2   SBRS 940 416080 5190061 E 2.5  
TWIN1R2   LBRS 1000 416140 5190061 F 2.8  
MARD1R1 West to East BSDZ 60 415811 5186108 Historic 0.1  
MARD1R1   BSDZ 250 416000 5186112 Historic 0.1  
MARD1R1   BSDZ 270 416020 5186112 Historic 0.1  
MARD1R1   BSDZ 280 416030 5186112 Historic 0.1  
MARD1R1   LBRS 550 416300 5186112 A 0.3  
MARD1R1   SBRS 590 416340 5186111 B 1.1  
MARD1R1   BSDZ 700 416453 5186113 C 1.3  
COUN1R1 West to East BSDZ 30 416320 5182869 Historic 0.1  
COUN1R1   BSDZ 160 416450 5182868 Historic 0.1  
COUN1R1   BSDZ 300 416590 5182871 Historic 0.1  
COUN1R1   BSDZ 360 416650 5182873 Historic 0.1  
COUN1R1   SBRS 510 416800 5182873 A 0.3  
COUN1R1   SBRS 570 416860 5182875 B 1.1  
COUN1R1   BSDZ 780 417069 5182873 C 1.3 Western limit of 1.3 ka Cascadia paleotsunami (Schlichting, 2000)
COUN1R1   LBRS 1040 417329 5182865 D 1.7  
COUN1R1   SBRS 1220 417509 5182853 E 2.5 Subsurface feature is between two surface point-source conductors.
MIDB1R1 West to East BSDZ 40 416492 5180083 Historic 0.1  
MIDB1R1   BSDZ 120 416572 5180081 Historic 0.1  
MIDB1R1   BSDZ 250 416701 5180076 Historic 0.1  
MIDB1R1   BSDZ 470 416921 5180070 Historic 0.1  
MIDB1R1   SBRS 660 417111 5180063 A 0.3  
MIDB1R1   SBRS 710 417161 5180062 B 1.1  
MIDB1R1   BSDZ 870 417321 5180058 C 1.3  
WASH1R9 East to West LBRS 110 418015 5177634 D 1.7  
WASH1R8 East to West BSDZ 130 418399 5177646 E 2.5  
WARR1R1 West to East BSDZ 50 416432 5177572 Historic 0.1  
WARR1R1   BSDZ 160 416541 5177553 Historic 0.1  
WARR1R1   BSDZ 220 416600 5177543 Historic 0.1  
WARR1R1   BSDZ 560 416936 5177490 Historic 0.1  
WARR1R1   LBRS 730 417104 5177463 A 0.3  
WARR1R1   BSDZ 890 417262 5177439 B    
WARR1R1   LBRS 1100 417470 5177425 C 1.3  
ASH1R1 West to East BSDZ 40 416744 5176844 Historic 0.1  
ASH1R1   LBRS 410 417109 5176833 A 0.3  
WASH1R1 West to East LBRS 280 417549 5176548 C 0.3  
PARK1 East to West LBRS 2070 419128 5159877 A 0.3  
PARK1   LBRS 1960 419237 5159867 B 1.1  
PARK1   SBRS 1590 419605 5159884 C 1.3  
PARK2 East to West LBRS 1100 420086 5159892 D 1.7  
PARK2   SBRS 540 420629 5159901 E 2.5  
PARK3 East to West SBRS 170 420974 5159916 F 2.8  
POST1 East to West LBRS 1260 419226 5156938 A 0.3  
POST1   FDDZ 1210 419276 5156940 B 1.1  
POST1   SBRS 820 419665 5156957 C 1.3  
POST2 East to West LBRS 400 420085 5156978 D 2.5  
OYST1 West to East BFRS 190 418775 5155503 Historic 0.1  
OYST1   LBRS 520 419101 5155461 A 0.3  
OYST1   FDDZ 570 419151 5155466 B 1.1  
OYST2 West to East LBRS 1300 420145 5155561 D 1.7  
OYST2   SBRS 1570 420364 5155589 E 2.5  
OYST2   LBRS 1900 420635 5155595 F 2.8  
OYST2   SBRS 2030 420741 5155591 G 3.2  
Joejohn East to West LBRS 1993 418967 5151534 A 0.3  
Joejohn   SBRS 1933 419033 5151532 B 1.1  
Joejohn   SBRS 1663 419147 5151495 C 1.3  
Joejohn   LBRS 1363 419446 5151489 D 1.7  
Joejohn   LBRS 1103 419705 5151480 E 2.5  
Joejohn   LBRS 843 419965 5151466 F 2.8  
Joejohn   SBRS 783 420024 5151461 G 3.2  
Joejohn   SBRS 180 420626 5151439 H 4  
227th East to West SBRS 1600 419359 5146424 C 1.3  
227th   LBRS 1160 419799 5146418 D 1.7  
227th   SBRS 650 420309 5146404 E 2.5  
227th   LBRS 570 420389 5146402 F 2.8  
227th   BSDZ 480 420479 5146400 G 3.2  
227th   BSDZ 240 420718 5146394 H 4  
KLIP East to West LBRS 120 419072 5146452 A 0.3 Klipsen Beach access road.
KLIP   LBRS 40 419151 5146458 B 1.1  
20MN East to West LBRS 220 419028 5143355 A 0.3  
20MN   LBRS 80 419168 5143351 B 1.1  
LOOM East to West LBRS 70 419687 5143296 D 1.7  
CRAN1 East to West BSDZ 2420 418868 5138511 Historic 0.1  
CRAN1   LBRS 2280 419008 5138507 A 0.3  
CRAN1   SBRS 2240 419048 5138506 B 1.1  
CRAN2 East to West SBRS 1820 419468 5138493 C 1.3  
CRAN2   LBRS 1680 419608 5138489 D 1.7  
CRAN3 East to West SBRS 1100 420144 5138593 F 2.8  
CRAN3   SBRS 1010 420234 5138588 G 3.2  
CRAN3   SBRS 810 420434 5138582 H 4  
CRAN3   I-LBRS 710 420534 5138580 I 4.2  
OCEAN West to East LBRS 50 421260 5138071 J    
116th East to West SBRS 400 418653 5137511 Historic 0.1  
116th   LBRS 130 418920 5137496 A 0.3  
116th   LBRS 90 418960 5137497 B 1.1  
PION1 East to West SBRS 1700 419231 5135413 C 1.3  
PION2 East to West BSDZ 1330 419616 5135392 E 2.5  
PION2   LBRS 1130 419816 5135384 F 2.8  
PION2   SBRS 1090 419856 5135384 G 3.2  
PION2   SBRS 800 420146 5135382 H 4  
PION2   LBRS 760 420186 5135382 I 4.2  
PION3 East to West SBRS 170 420776 5135375 J    
PION3   BSDZ 50 420896 5135372 unidentified    
HORSE2R1 East to West LBRS 20 418823 5134383 A 0.3  
SEAB1R1 West to East LBRS 420 418526 5131288 A 0.3  
SEAB1R1   LBRS 470 418576 5131286 B 1.1  
SEAB1R1   LBRS 550 418656 5131285 C 1.3  
SEAB1R1   LBRS 600 418706 5131284 D 1.7  
41ST West to East LBRS 70 418885 5131504 E 2.5  
41ST   LBRS 100 418915 5131502 F 2.8  
41ST   LBRS 130 418945 5131501 G 3.2  
41ST   LBRS 550 419365 5131486 H 4  
41ST   LBRS 880 419692 5131473 I 4.2  
IRED East to West SBRS 420 424705 5114394 Historic 0.1  
IRED   SBRS 300 424820 5114426 Historic 0.1  
IRED   LBRS 30 425079 5114500 A 0.3  
CAMP25A West to East LBRS 370 426648 5109458 A 0.3 Positions same as CAMP (at 25MHz).
CAMP25A   LBRS 410 426688 5109456 B 1.1  
CAMP West to East LBRS 370 426653 5109458 A 0.3  
CAMP   FDDZ 420 426703 5109455 B 1.1  
CAMP   FDPS 430 426713 5109454     Seaward truncation of foredune paleosol.
CAMP   LBRS 900 427129 5109307 D 0.7  
CAMP   LBRS 1350 427563 5109416 E 2.5  
PERK1R1 West to East LBRS 30 427998 5108756 F 2.8  
PERK1R1   SBRS 110 428078 5108757 G 3.2  
PERK1R1   SBRS 210 428178 5108758 H 4  
PERK1R23 West to East SBRS 50 428331 5108760 I 4.2  
PERK1R23   SBRS 120 428400 5108753 J    
PERK1R23   BSDZ 300 428580 5108753 unidentified    
SUNS West to East BSDZ 310 427540 5105490 Historic 0.1  
SUNS   BSDZ 390 427619 5105505 Historic 0.1  
SUNS   LBRS 560 427786 5105538 A 0.3  
SUNS   FDDZ 600 427825 5105546 B 1.1  
SUNS   FDPS 610 427835 5105548     Seaward truncation of foredune paleosol.
SUNS   LBRS 870 428089 5105600 D 1.7  
SUNS   LBRS 1140 428351 5105646 E 2.5  
SUNS   LBRS 1540 428751 5105642 F 2.8  
SUNS   SBRS 1570 428781 5105642 G 3.2  
DELR West to East FDDZ 360 428358 5099857 A 0.3  
DELR   FDDZ 380 428378 5099857 B 1.1  
DELR   FDPS 390 428388 5099858     Seaward truncation of foredune paleosol.
DELR   FDDZ 640 428632 5099889 C 1.3  
DELR   LBRS 720 428696 5099937 D 1.7  
DELR   SBRS 1110 429075 5099984 E 2.5  
DELR   LBRS 1280 429245 5099987 F 3.2  
GOLF West to East BSDZ 230 428657 5098409 C 1.3  
GOLF   SBRS 340 428766 5098412 D 1.7  
GOLF   LBRS 700 429126 5098419 E 2.5  
HILL West to East LBRS 110 429448 5098228 F 2.8  
HILL   LBRS 220 429558 5098230 G 3.2  
HILL   LBRS 470 429807 5098233 H 4  
HILL   LBRS 510 429847 5098233 I 4.2  
SALM West to East SBRS 140 430062 5098180 J    
ESTR West to East BSDZ 140 428234 5096746 Historic 0.1  
ESTR   LBRS 270 428364 5096736 A 0.3 Est and OceanRd intersection NW corner at 334.
ESTR   LBRS 310 428404 5096734 B 1.1  
ESTR   BFDZ 630 428723 5096735 C 1.3  
ESTR   LBRS 800 428893 5096737 D 1.7  
GSTR West to East LBRS 110 429171 5096575 E 2.5 West G St profile is 143 m north of East G St profile.
GSTR   BSDZ 360 429420 5096562 F 2.8 Trenching showed cobble-filled scarp (Woxell, 1998)
OSTR1R1 West to East LBRS 180 429624 5096568 G 3.2  
OSTR1R1   SBRS 250 429694 5096566 H 4  
OSTR1R1   LBRS 380 429824 5096569 I 4.2