Home Archived February 20, 2019

Link to USGS home page
125 years of science for America 1879-2004
Sound Waves Monthly Newsletter - Coastal Science and Research News from Across the USGS
Home || Sections: Spotlight on Sandy | Fieldwork | Research | Outreach | Meetings | Awards | Staff & Center News | Publications || Archives


New USGS Publication Reveals Human Influence on San Francisco Bay Floor

in this issue:
 previous story | next story

The U.S. Geological Survey (USGS) recently released "Shifting Shoals and Shattered Rocks—How Man Has Transformed the Floor of West-Central San Francisco Bay" (USGS Circular 1259), by John Chin, Florence Wong, and Paul Carlson. The new book takes readers beneath the waters of San Francisco Bay to see a bay floor greatly modified by humans since the California gold-rush days of the 1850s. Recent high-resolution mapping provides a detailed image of sandy dune fields, rocky pinnacles, and extremes in relief—much like features on dry land. The new map data reveal evidence of large-scale, long-lasting excavations dug in the 1910s and 1930s to provide fill to enlarge the Marina District in San Francisco and to create Treasure Island off the San Francisco-Oakland Bay Bridge. Rock pinnacles in western San Francisco Bay that lie in or adjacent to major shipping lanes have been lowered by blasting several times in the past. Depressions in the bay floor have served as economical, but rapidly filled, targets for disposal of construction and other debris. Sand beds on the bay floor are a major resource that is mined for construction. The book includes a folded poster containing a three-dimensional image of the bay floor, and a set of 3D glasses.

view toward downtown San Francisco
Above: This view toward downtown San Francisco, featured on the new book’s cover, shows a large container vessel passing beneath the Golden Gate Bridge as it enters San Francisco Bay. Photograph by Michael F. Diggles, USGS.

Related Web Sites
Shifting Shoals and Shattered Rocks—How Man Has Transformed the Floor of West-Central San Francisco Bay - USGS Circular 1259
U.S. Geological Survey (USGS)

in this issue:
 previous story | next story


Mailing List:

print this issue print this issue

in this issue: Fieldwork cover story:
Images and Information About Recent Hurricanes

Drilling Monitoring Wells in the Dry Tortugas

American Samoa's Resilient Coral Reefs

Seepage Samplers in Ashumet Pond

Research Wastewater - A Potential Threat to Florida Keys

Gulf of Mexico Vulnerable to Hurricanes

Outreach USGS Pacific Science Center Open House

Exhibit Designers Interested in Hurricane Research

USGS Hosts Science-Learning Session

Meetings Shore and Beach Preservation Conference

Deep Water Coral Research Workshop

Awards Jim Estes Wins Shoemaker Award

Four Publications Win Shoemaker Awards

Gene Shin Wins Shifting Baselines Contest

Staff & Center News NMSF Regional Office Moving to St. Petersburg, FL

Elena Nilsen Joins Coastal and Marine Geology Team

USGS Vessel To Test Counter-Terrorism Equipment

Dave Reid Wins Triathlon

Publications Southern Sea Otter Video Online

Human Influence on San Francisco Bay Floor

U.S. Coastal Cliffs

October Publications List

FirstGov.gov U. S. Department of the Interior | U.S. Geological Survey
Sound Waves Monthly Newsletter

email Feedback | USGS privacy statement | Disclaimer | Accessibility

This page is http://soundwaves.usgs.gov/2004/10/pubs2.html
Updated December 02, 2016 @ 12:09 PM (JSS)