3 why were parts of the early island of surtsey

This preview shows page 4 - 5 out of 5 pages.

took days or weeks to build the volcano to just beneath the sea surface. 3. Why were parts of the early island of Surtsey quickly washed away by  the sea? (page 19, para 1) The island was split lengthwise by the erupting fissure and one vent along  with fissure became dominant, and the island began to assume a more  circular shape.  The entire island was made of loose, dark volcanic debris,  thrown out in fragments by the explosive eruption. 4. Why were steam eruptions characteristics of the early eruptions once  Surtsey was above the ocean's surface? (page 20, para 1) Steam eruptions/explosions were characteristics of early eruption because  during the first 3 months, the sea had easy access to the erupting vents,  both my direct flooding and by seepage through the loose volcanic pile.  Steam explosions characterize shallow submarine eruptions. 5. How many phases of the Surtsey volcanic eruption were there and what  were they? (page 24, para 2)
Image of page 4

Subscribe to view the full document.

There were 3 phases of the Surtsey volcanic eruption which were the  quiet, undetected growth, the explosive eruptions from shallow water built  an island of loose volcanic debris, and the blocking of water from the vent  stopped the explosions and allowed the quiet emission of lava flows. 6. How does the shape of the current island of Surtsey reflect the phases  of the volcanic eruption? (page 24, para 3) The shape of Surtsey now reflect the phases of the volcanic eruption as  follows: the sides of the underwater base are steep, owing to the rapid  cooling and piling up of the submarine lavas.  The explosive debris formed  steep crater walls and comes above sea level by wave erosion, and the  final lava flows formed gentle slopes where they poured out and hardened  over the loose debris from earlier explosions.
Image of page 5

{[ snackBarMessage ]}

Get FREE access by uploading your study materials

Upload your study materials now and get free access to over 25 million documents.

Upload now for FREE access Or pay now for instant access
Christopher Reinemann
"Before using Course Hero my grade was at 78%. By the end of the semester my grade was at 90%. I could not have done it without all the class material I found."
— Christopher R., University of Rhode Island '15, Course Hero Intern

Ask a question for free

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern