How deep is the bedrock in California?
The depth to bedrock is generally less than 1 kilometer in the map area, except for localized depressions north and south of Kramer Hills, northwest-trending pockets about 4 kilometers northeast of Rogers Lake, and a large depression southwest of Rogers Lake.
Where are all the fault lines in California?
The main trace of the San Andreas fault runs through much of the State of California, including the Santa Cruz Mountains and up the San Francisco Peninsula, before heading offshore at Daly City and returning onshore again at Bolinas and continuing up the Marin and Sonoma County coasts.
Where can I buy geological maps?
The USGS National Geologic Map Database (NGMDB) is an excellent resource, where you can find and download hundreds of published geologic maps from a variety of sources (including CGS). The NGMDB is a service provided by the United States Geological Survey.
How far down do you have to dig to reach bedrock?
Bedrock wells are drilled below the topsoil and groundwater into bedrock, tapping the cracks in the rock that carry water deep underground. The average bedrock well in New Hampshire is between 100-feet and 500-feet deep, but drilling depth can go up to 1,000 feet.
What exactly is bedrock?
Bedrock is the hard, solid rock beneath surface materials such as soil and gravel. Bedrock is consolidated rock, meaning it is solid and tightly bound. Overlying material is often unconsolidated rock, which is made up of loose particles.
Where is the biggest fault line in California?
The San Andreas Fault
The San Andreas Fault might be California’s most known fault line, but maybe not its most destructive. Recently, many faults have been discovered in the Sierra and Southern Cascades, an area active with smaller earthquakes and swarms over the last 150 years.
When was the last California tsunami?
2011
The most recent damaging tsunami occurred in 2011 when an earthquake and tsunami that devastated Japan traveled across the Pacific Ocean, causing $100 million of damage to California harbors and ports.
Where can I order a map?
Online stores such as Amazon will likely have the largest selection of maps. You can also purchase map collections such as the Road Atlas that will have a handful of different regions bound together in one book.
