Featured Research

from universities, journals, and other organizations

New Kind Of Undersea Eruption Defined: 'Neptunian'

Date:
July 2, 2009
Source:
Geological Society of America
Summary:
Two Australian researchers have defined a newly recognized kind of explosive eruption, termed "neptunian," that is restricted to seafloor volcanoes.

Two Australian researchers have defined a newly recognized kind of explosive eruption, termed "neptunian," that is restricted to seafloor volcanoes.

Sharon R. Allen and Jocelyn McPhie, of the School of Earth Sciences and Centre of Excellence in Ore Deposits, at the University of Tasmania in Hobart, Tasmania, describe their work in a new article published in the journal Geology.

These eruptions are sustained and driven by gas exsolved from magma. The explosions inject large volumes of hot pumice clasts into the seawater above the vent. The hot pumice clasts rapidly absorb water and sink, forming density currents that flow across the seafloor.

Vast areas of the modern seafloor are covered by these pumice-rich neptunian deposits. Neptunian eruptions differ dramatically from magmatic-gas-driven explosive eruptions on land, reflecting the important influence of confining pressure and the higher heat capacity, density, and viscosity of water compared to air.


Story Source:

The above story is based on materials provided by Geological Society of America. Note: Materials may be edited for content and length.


Journal Reference:

  1. Sharon R. Allen and Jocelyn McPhie. Products of neptunian eruptions. Geology, 2009; DOI: 10.1130/G30007A.1

Cite This Page:

Geological Society of America. "New Kind Of Undersea Eruption Defined: 'Neptunian'." ScienceDaily. ScienceDaily, 2 July 2009. <www.sciencedaily.com/releases/2009/06/090630204755.htm>.
Geological Society of America. (2009, July 2). New Kind Of Undersea Eruption Defined: 'Neptunian'. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2009/06/090630204755.htm
Geological Society of America. "New Kind Of Undersea Eruption Defined: 'Neptunian'." ScienceDaily. www.sciencedaily.com/releases/2009/06/090630204755.htm (accessed July 31, 2014).

Share This




More Earth & Climate News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Big Waves In Arctic Ocean Threaten Polar Ice

Big Waves In Arctic Ocean Threaten Polar Ice

Newsy (July 30, 2014) Big waves in parts of the Arctic Ocean are unprecedented, mainly because they used to be covered in ice. Video provided by Newsy
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com
Amid Drought, UCLA Sees Only Water

Amid Drought, UCLA Sees Only Water

AP (July 30, 2014) A ruptured 93-year-old water main left the UCLA campus awash in 8 million gallons of water in the middle of California's worst drought in decades. (July 30) Video provided by AP
Powered by NewsLook.com
In Virginia, the Rise of a New Space Coast

In Virginia, the Rise of a New Space Coast

AP (July 30, 2014) Every summer, tourists make the pilgrimage to Chincoteague Island, Va. to see wild ponies cross the Assateague Channel. But, it's the rockets sending to supplies to the International Space Station that are making this a year-round destination. (July 30) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile: iPhone Android Web
      Follow: Facebook Twitter Google+
      Subscribe: RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins