Igneous structures volcanic
This presentation is the property of its rightful owner.
Sponsored Links
1 / 63

Igneous Structures: Volcanic PowerPoint PPT Presentation


  • 52 Views
  • Uploaded on
  • Presentation posted in: General

Igneous Structures: Volcanic. Viscosity. Units: pascal-seconds (kg/m-sec) How many pascals pressure x how many seconds to squash fluid flat? Viscous: Material flows as long as pressure is applied, however small Pseudoviscous: Material flows after some threshold stress.

Download Presentation

Igneous Structures: Volcanic

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Igneous structures volcanic

Igneous Structures: Volcanic


Viscosity

Viscosity

  • Units: pascal-seconds (kg/m-sec)

  • How many pascals pressure x how many seconds to squash fluid flat?

  • Viscous: Material flows as long as pressure is applied, however small

  • Pseudoviscous: Material flows after some threshold stress


Viscosity of common materials

Viscosity of Common Materials


Geologic viscosities

Geologic Viscosities


What drives magma

What Drives Magma?

  • Magma is typically 10% lighter than equivalent solid rock

    • Why pressure inhibits melting

  • Buoyancy drives magma upward

    • Weight of rock around volcanic conduit > weight of magma

  • Gas pressure powers volcanic eruptions

  • Mafic (dense) rocks can sink in crust by viscous flow


Plate tectonics and volcanoes

Plate Tectonics and Volcanoes


A cinder cone wizard island crater lake oregon

A Cinder Cone:Wizard Island, Crater Lake, Oregon


Paricutin mexico 1943 1952

Paricutin, Mexico1943-1952


Anatomy of a cinder cone hawaii

Anatomy of a Cinder Cone, Hawaii


Tuff ring diamond head hawaii

Tuff Ring: Diamond Head, Hawaii


Tuff ring diamond head hawaii1

Tuff Ring: Diamond Head, Hawaii


Shield volcano haleakala hawaii

Shield Volcano: Haleakala, Hawaii


Stromboli

Stromboli


Mount lassen and mount tehama

Mount Lassen and Mount Tehama


Mount shasta california

Mount Shasta, California


Shasta and shastina

Shasta and Shastina


Shastina and landslide deposit

Shastina and Landslide Deposit


Mount shasta and landslide deposit

Mount Shasta and Landslide Deposit


Mount saint helens and spirit lake

Mount Saint Helens and Spirit Lake


May 18 1980

May 18, 1980


The mountain collapses

The Mountain Collapses


Mount st helens

Mount St. Helens


Mt st helens

Mt. St. Helens


Bezymianny russia

Bezymianny, Russia


Lava dome california

Lava Dome, California


Rhyolite plugs and pumice rings

Rhyolite Plugs and Pumice Rings


Rhyolite plugs and pumice ring

Rhyolite Plugs and Pumice Ring


Obsidian dome california

Obsidian Dome, California


Obsidian

Obsidian


Rhyolite plugs and pumice rings1

Rhyolite Plugs and Pumice Rings


Maar nevada

Maar, Nevada


Volcanic neck new mexico

Volcanic Neck, New Mexico


Topographic inversion nevada

Topographic Inversion, Nevada


How calderas form

How Calderas Form


Crater lake oregon

Crater Lake, Oregon


Mount mazama after

Mount Mazama: After


Mount mazama before

Mount Mazama: Before


Jemez caldera new mexico

Jemez Caldera, New Mexico


Valles caldera new mexico

Valles Caldera, New Mexico


Tuff valles caldera new mexico

Tuff, Valles Caldera, New Mexico


Welded tuff california

Welded Tuff, California


Santorini thera greece

Santorini (Thera), Greece


Santorini thera greece1

Santorini (Thera), Greece


Santorini greece

Santorini, Greece


Santorini greece1

Santorini, Greece


Ash layer santorini

Ash Layer, Santorini


Ash layers santorini

Ash Layers, Santorini


What really destroyed the minoan civilization

What Really Destroyed the Minoan Civilization


Collapsing volcanoes hawaii

Collapsing Volcanoes - Hawaii


Molokai scarp

Molokai Scarp


Nuuanu pali oahu

Nuuanu Pali, Oahu


Tambora 1815

Tambora 1815

1816: “Year Without A Summer”

  • 100 cubic km of ash erupted

  • Global sunset color effects for months

  • New England

    • Snow in June and August, Frost in July

    • Exodus to Midwest

  • Europe: High prices, food riots


Tambora

Tambora


Long valley caldera

Long Valley Caldera


Long valley caldera1

Long Valley Caldera


Bishop tuff

Bishop Tuff


Compaction of bishop tuff

Compaction of Bishop Tuff


Toba sumatra

Toba, Sumatra


Eyjafjallajokull iceland

Eyjafjallajokull, Iceland


Flood basalts washington

Flood Basalts, Washington


Lava delta washington

Lava “Delta,” Washington


Columnar jointing washington

Columnar Jointing, Washington


  • Login