September Geology Image of the Month: Angular Unconformity at Beach 4, Olympic National Park

The September Geology Image of the Month was taken by State Geologist, Dave Norman. It shows a well-exposed angular unconformity in the rocks at Beach 4, located along coastal Highway 101 between Ruby Beach (to the N) and Kalaloch (to the S), and within the bounds of Olympic National Park. An angular unconformity is created […]


On July 18, DGER Chief Hazards Geologist, Tim Walsh, led a field trip for FEMA officials and their international counterparts from Australia and New Zealand. While traversing Elliott Bay on the Seattle-Bainbridge Island ferry, he spoke on the subject of earthquake and tsunami threats to the Seattle area, recounting evidence of Seattle Fault activity and […]