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“Bite-Size Bits of Local, National, and Global History”
Daly City in San Mateo County, California — The American West (Pacific Coastal)
 

The Ground Beneath Your Feet

 
 
The Ground Beneath Your Feet Marker image. Click for full size.
By Sandra Hughes, January 20, 2008
1. The Ground Beneath Your Feet Marker
Inscription. Here at Thornton Beach, the ground is not as solid as it seems. The ground itself is made up of a semi-consolidate sedimentary rock from here to Mussel Rock. It doesn't hold together well, which makes the coastline very unstable.

Constant pounding of the surf along Daly City coast undercuts the cliffs. Rain scours and penetrates the soil loosening the rock structure. Gravity pulls the weakened slopes down in slumps and slides. If that weren't enough, the San Andreas Fault runs 1/4 mile from this spot. Ground shaking from earthquakes causes landslides too. Geologists believe the shelf below you, between this elevation and the shore, is a mighty rotational slump triggered by the 1906 earthquake.

This Daly City beach was once accessible by road. In 1982 heavy rains and unusually large tidal action undercut the cliffs from Thornton Beach south to Mussel Rock, causing a massive landslide. Concern over safety keeps the 56-acre property and beach inaccessible.
 
Location. 37° 41.862′ N, 122° 29.79′ W. Marker is in Daly City, California, in San Mateo County. Marker can be reached from Thornton Beach Road west of Skyline Boulevard. Click for map. Marker is at Thornton Beach State Park along the Ocean Front. Marker is at or near this postal address: 2198 Sky Line Boulevard, Daly City CA 94015, United States of America.
 
Other nearby markers.
The Ground Beneath Your Feet Marker image. Click for full size.
By Sandra Hughes, January 20, 2008
2. The Ground Beneath Your Feet Marker
At least 8 other markers are within 3 miles of this marker, measured as the crow flies. If it's Summer, Bring a Sweater (approx. 0.2 miles away); Broderick – Terry Duel (approx. one mile away); Where Daly City Started (approx. 2 miles away); Mount Olivet Cemetery Office and Streetcar Line (approx. 2.4 miles away); Colma Historical Museum (approx. 2.4 miles away); Railroad Semaphore Signal (approx. 2.4 miles away); Old Colma Railroad Station (approx. 2.5 miles away); a different marker also named Old Colma Railroad Station (approx. 2.5 miles away). Click for a list of all markers in Daly City.
 
Categories. Natural Features
 
The Ground Beneath Your Feet Marker image. Click for full size.
By Sandra Hughes, January 20, 2008
3. The Ground Beneath Your Feet Marker
 
 
Credits. This page originally submitted on , by Sandra Hughes of Killen, Usa. This page has been viewed 525 times since then and 7 times this year. Photos:   1, 2, 3. submitted on , by Sandra Hughes of Killen, Usa. • Syd Whittle was the editor who published this page. This page was last revised on June 16, 2016.
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