New Seamount discovered off coast of California

  • Thread starter Astronuc
  • Start date
  • Tags
    california
In summary, a seamount was recently discovered by a seafloor mapping drone and it has a unique shape resembling a giant tower. It is about 3,300 feet tall with steep, smooth sides and a diameter of nearly 3,000 feet. The summit of the seamount is 11,352 feet below sea level and has a 1,200 feet deep crater at the top. To be classified as a seamount, the feature must have a vertical relief of at least 1,000 meters (3,300 feet) above the surrounding seafloor. According to the U.S. Geological Survey, there are at least 63 seamounts off the coast of California, most of which are 100 miles offshore
  • #1
Astronuc
Staff Emeritus
Science Advisor
2023 Award
22,185
6,854
A seamount, as underwater mountains are called, was discovered by a seafloor mapping drone and its shape is more like a giant tower than a mountain.

It rises about 3,300 feet, has “relatively steep, smooth sides” and is rounded, with a diameter of nearly 3,000 feet, officials say.
https://www.yahoo.com/news/startlingly-round-formation-steep-smooth-141125280.html
The summit of the seamount is about 11,352 feet below sea level. Meanwhile, the crater at the top of it is 1,200 feet deep, data shows.

“There is a broad size distribution for seamounts but to be classified as a seamount, the feature must have a vertical relief of at least 1,000 meters (3,300 feet) above the surrounding seafloor.”

The U.S. Geological Survey reports “there are at least 63 seamounts” off California, and most of them are 100 miles offshore and a mile deep. It’s estimated they are 10 million to 25 million years old, and none are active volcanoes, the USGS says.
 
  • Like
  • Wow
Likes BillTre, dlgoff and berkeman
Earth sciences news on Phys.org
  • #3
Bystander said:
"...none are active...." Now they've done it.
Not to worry...
California at one time many millions of years ago had lots of volcanic activity, due to the subduction of the Farallon Plate. Subduction continues to this day with remnants of the Farallon Plate, but only well north of San Francisco (Juan de Fuca Plate) and south of the southern tip of Baja California (Rivera and Cocos Plates). Plate motion for most of California is lateral, so there is no heavy seabed rock being subducted and heated to form magma that can feed volcanoes in this region.
North of there is a different story, as the video of magma activity below the Three Sisters and relatively recent eruption of Mt. St. Helens show.
 
  • Informative
  • Like
Likes Tom.G, berkeman, BillTre and 1 other person

FAQ: New Seamount discovered off coast of California

What is a seamount?

A seamount is an underwater mountain formed by volcanic activity. These geological features rise from the ocean floor but do not reach the water's surface. Seamounts can vary in size and shape and are often found in chains or clusters in oceanic regions.

How was the new seamount discovered off the coast of California?

The new seamount was discovered using advanced sonar mapping technology and underwater exploration vehicles. Researchers utilized these tools to survey the ocean floor, revealing previously uncharted geological features.

What is the significance of discovering a new seamount?

Discovering a new seamount is significant for several reasons. It can enhance our understanding of marine biodiversity, as seamounts often serve as habitats for various marine species. Additionally, studying these formations can provide insights into geological processes and the history of the Earth's crust.

What types of marine life are typically found around seamounts?

Seamounts are often hotspots for marine biodiversity. They can support a variety of life forms, including corals, sponges, fish, and invertebrates. The unique topography and currents around seamounts create favorable conditions for nutrient upwelling, attracting a diverse range of species.

Are there any conservation efforts related to the new seamount?

Yes, conservation efforts may be initiated to protect the newly discovered seamount and its surrounding ecosystem. This can include establishing marine protected areas, conducting further research, and monitoring human activities such as fishing and mining that could impact the fragile marine environment.

Similar threads

Replies
6
Views
2K
Replies
1
Views
3K
Back
Top