Images

Mokelumne River near confluence with the San Joaquin River in the Sacramento-San Joaquin Delta, CA, looking downstream, with Cordell Johnson (USGS PCMSC) and Rachel Allen (USGS PCMSC) collecting data from the R/V Fast Eddy.

Orthophoto (GigaPan) of the former Elwha Dam and former Lake Aldwell, on the Elwha River, Washington, compiled from ultra high-resolution images collected with a Ricoh GR camera operating at 2-second intervals, mounted on a Cessna 172 piloted by Rite Bros. Aviation and processed using Structure-from-Motion techniques.

Orthophoto (GigaPan) of the former Glines Canyon Dam and former Lake Mills, on the Elwha River, Washington, compiled from ultra high-resolution images collected with a Ricoh GR camera operating at 2-second intervals, mounted on a Cessna 172 piloted by Rite Bros. Aviation and processed using Structure-from-Motion techniques.

Orthophoto of the mouth of the Elwha River in Washington. The orthophoto was compiled from images collected with a Ricoh GR camera operating at 2-second intervals and mounted on a Cessna 172 piloted by Rite Bros. Aviation.

Bird's eye view of the ISA 24th Council

The view from one of two video cameras atop the Dream Inn hotel in Santa Cruz, California, that overlook the coast in northern Monterey Bay. This view, from camera 1, looks eastward over Santa Cruz Main Beach and boardwalk.

(Left to right) Danny Brothers (USGS Pacific Coastal and Marine Science Center [PCMSC]), Peter Haeussler (USGS Alaska Science Center), Maureen Walton (PCMSC), and Jamie Conrad (PCMSC) select seafloor sediment samples from cores collected along the Queen Charlotte-Fairweather fault.

USGS and Geological Survey of Canada scientists sample sediment cores collected from the sea floor along the Queen Charlotte Fault. This was taken while they were working with (or in) the Geological Survey of Canada.

The natural oil seep in this photo is located in Pescadero Creek County Park, where the Canyon Trail crosses Tarwater Creek. The oil is black, has a taffy-like consistency, and smells like motor oil.

The Half Moon Bay oil field is one of the oldest oil fields in California and was first developed during the 1880s. Since then, the field has produced an estimated 60,000 barrels of oil from about 19 wells.

International participants from Australia, New Zealand, Fiji, the Republic of the Marshall Islands, Hawaii, Spain, France, Belgium, the Netherlands, Germany, Israel, and the U.S. attended a workshop on “Understanding Flooding on Reef-lined Island Coastlines”, February 5-7, 2018.

Dredging operations aboard the research vessel Alpha Crucis. The first dredge with successful rock recovery is wrangled back on deck.

Digital elevation model (left) and orthomosaic (right) of the middle Elwha River

Eroding bluffs on Moss Landing State Beach, California, March 2016

Marine geology enthusiasts at the Council for Geoscience (CGS) conference.

Elkhorn corals (Acropora palmata) on the seafloor along the northeastern coast of Buck Island, U.S. Virgin Islands, have died and collapsed into rubble. As coral reef structure degrades, habitat for marine life is lost and nearby coastlines become more susceptible to storms, waves, and erosion.

Healthy elkhorn coral (Acropora palmata) on the seafloor along the southeastern coast of Buck Island, U.S. Virgin Islands. Elkhorn coral is one of many important reef-building species that create 3D structure on the seafloor. Coral reef structure provides habitat for marine life and helps break up waves as they approach the coastline.

Perspective views of multibeam bathymetry data acquired by the USGS aboard the R/V Medeia. Shallower depths in red. Arrows point to the distinct line in the seafloor associated with the Queen Charlotte-Fairweather fault.

Left: Key features in and around the Gulf of Alaska. A black rectangle outlines our 2016 study area along the Queen Charlotte-Fairweather fault. Red arrows indicate relative tectonic plate motions. Right: A shaded relief map of the 2016 study area. Rainbow colors show seafloor depths acquired by the USGS in 2015 and 2016. Red indicates shallower depths.

Gerry Hatcher with the system he designed to record the precise time and geographic location of each air photo Van Wagenen shoots.

Paul’s Slide. Left: Air photo taken May 27, 2017, one of many that Beth Haddon will analyze with structure-from-motion software to measure changes in ground elevation. Right: Caltrans employees and contractors use an excavator and bulldozer to remove Paul’s Slide debris from California State Highway 1.