Figure 2

Figure 2. Map showing location of parts of seismic-reflection profiles and photographs described in
the Structure Map discussion.

Links: There are links on the map that will link to the indicated figures. As the mouse is moved over
the map, links are revealed when the icon changes to
.

Figure 3

Figure 3. Segment of U.S. Geological Survey Line P 183, a migrated, multichannel, airgun seismic reflection profile from the eastern Juan de Fuca Strait (Figure 2). Bold red lines
show faults and inferred faults. Arrows indicate sense of movement across. Tops of yellow dots indicate inferred base of Quaternary deposits; tops of blue triangles indicated
inferred base of latest Pleistocene to Holocene (post glacial) deposits. shows syncline axis.

Figure 4

Figure 4. Faulted and fractured late Quaternary outwash sand beds, exposed on the east coast
of Holmes Harbor within the southern Whidbey Island fault zone.

Figure 5

Figure 5. Anticline axis (dashed line) in southern Whidbey Island fault zone, exposed on the
west coast of Whidbey Island. Gravel beds at right fill a large steep channel cut into fine-
grained beds at left. Both the gravel and the fine-grained strata are inferred to be glaciomarine
drift that occurs at the top of the Double Bluff drift (~150 ka?). Bluff height is about 50 metres.

Figure 6

Figure 6. Segment of U.S. Geological Survey Line P127, a migrated, multichannel, airgun seismic-reflection profile from the eastern Juan de Fuca Strait (Figure 2). Bold red lines show
faults and inferred faults. Tops of yellow dots indicate inferred base of Quaternary deposits; tops of blue triangles indicate inferred base of latest Pleistocene to Holocene (postglacial)
deposits; and prominent water-bottom multiples are shown by "m".

Figure 7

Figure 7. Segment of Industry Line 2, a migrated, multichannel, seismic-reflection profile from the eastern Juan de Fuca Strait area (Figure 2). Dashed red lines show faults. Top of yellow
dots indicates inferred base of Quaternary deposits.

Figure 8 Figure 8. Segment of Industry Line 2, an unmigrated, multichannel, seismic-reflection profile from the eastern Juan de Fuca Strait area (Figure 2). Dashed redlines show faults. Arrows indicate sense of movement across faults. Top of yellow dots indicated inferred base of Quaternary deposits. This line was described in detail in Johnson and others (1996).

Figure 9

Figure 9. Segment of U. S. Geological Survey Line P176, a migrated, multichannel, airgun seismic-reflection profile from east of Whidbey Island (Figure 2). Bold red lines show faults and inferred faults. Arrows indicate sense of
movement across faults. Tops of yellow dots indicate inferred base of Quaternary deposits; tops of blue triangles indicate inferred base of latest Pleistocene to Holocene (postglacial) deposits; and prominent water-bottom multiples
are shown by "m". Location of anticline axis is shown above profile.

Figure 10

Figure 10. Exposures of late Quaternary strata within the Strawberry Point fault zone at Strawberry Point on northeastern Whidbey Island.
A. Northwest-dipping strata (~45°) of the ~100 ka Whidbey Formation, consisting of mud, sand, and woody peat (red arrow above shovel).
Shovel handle is divided into 10 cm increments.
B. "Exposure of highly fractured friable sand of the Whidbey Formation.

Figure 11

Figure 11. Folded (dip ~ 24°) and fractured late Quaternary strata (~21 ka) exposed at
Utsalady Point within the Utsalady Point fault zone, northeastern Camano Island (Figure 2).

Figure 12

Figure 12. Segment of U.S. Geological Survey Line P168, an unmigrated, high-frequency,
geopulse, seismic-reflection profile (Figure 2). Profile shows break in slope and contrast in
sediment reflection properties that coincides with the Devils Mountain fault.

Figure 13

Figure 13. Segment of U.S. Geological Survey Line P166, a migrated, multichannel, airgun seisminc-reflection profile from the eastern Juan de Fuca Strait area (Figure 2).
Bold red lines show faults and inferred faults. Arrows show sense of movement on faults. Tops of yellow dots indicate inferred base of Quaternary deposits; tops of blue
triangles indicate inferred base of latest Pleistocene to Holocene (postglacial) deposits; and prominent water-bottom multiples are shown by "m". Location of anticline
axis is shown above the profile. shows anticline axis.

Figure 14

Figure 14. Segment of Industry Line 1, an unmigrated, multichannel, airgun seismic-
reflection profile from the eastern Juan de Fuca Strait area (Figure 2). Dashed red lines show
fault. Arrows indicate sense of movement across fault. Top of yellow dots indicates inferred
base of Quaternary deposits. Location of anticline axis is shown above the profiles.

Figure 15

Figure 15. Segment of SHIPS Line JDF 4 (Figure 2), a migrated, multichannel, seismic-
reflection profile from the eastern Juan de Fuca Strait area. Dashed red line shows
inferred fault. Top of yellow dots indicates inferred base of Quaternary deposits.

Figure 16

Figure 16. Segment of Geological Survey of Canada Line 35 (Figure 2), a high-resolution, multichannel, migrated arigun seismic-reflection profile from the eastern Juan de Fuca Strait area. Dased red line
show inferred faults. Arrows indicate sense of movement across fault. Top of yellow dots indicates inferred base of Quaternary deposits; top of blue triangles indicate inferred base of latest Pleistocene to
Holocene (postglacial) deposits; and prominent water-bottom multiples are shown by "m".

Figure 10 Figure 13 Figure 14 Figure 4 Figure 3 Figure 5 Figure 12 Figure 9 Figure 6 Figure 7 Figure 8 Figure 15 Figure 11 Figure 16