1 / 5

Understanding Volcanoes: Active, Dormant, and Extinct Volcanoes in Earth Processes

Dive into the world of volcanoes and earth processes. Learn about active, dormant, and extinct volcanoes, and how they shape the landscape over geological time scales. Explore the terminology and tools used by volcanologists to study seismic activity, pyroclastic flows, magma, and lava. Discover the role of tectonic forces and erosion in building and shaping the Earth's surface.

livia
Download Presentation

Understanding Volcanoes: Active, Dormant, and Extinct Volcanoes in Earth Processes

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Volcanoes and Earth Processes

  2. Volcanoes Active: a volcano that is currently erupting, or has erupted very recently. Extinct: a volcano that has erupted in the past, but that likely will not erupt in the future. Dormant: a volcano that is not erupting, but could realistically erupt in the future.

  3. Active, Dormant, Extinct • These terms do not help us very much because the “recharge” of an active volcano occurs over ‘geological time scales’ (long periods of time), and therefore makes the definition problematic. • Some organizations that research volcanoes have suggested that if a volcano has erupted in the past 12 000 years (during the Holocene epoch), it is to be considered active.

  4. Dante’s Peak Terminology: Volcanologist: a researcher who studies volcanoes. Seismic Activity: vibrations and movement within the crust (can cause earthquakes and volcanic activity) Seismograph: a device that measures seismic activity Tiltmeter: a device that measures the change in shape (uplift/bulge) as pressure builds within a volcano. Pyroclastic Flow: a wave of very hot rock fragments, gases and ash that have been ejected from an active volcano. (pryo means fire, clastic refers to fragments). They can reach temperatures of 1000 degrees celcius and move at up to 700 km/h. Magma: molten rock material inside the earth. Lava: molten rock material on the earth’s surface.

  5. Earth Processes • Land is built by tectonic force and volcanoes (new igneous rock). This is often known as ‘mountain building.’ • Land is worn-down by erosion: the movement of sediment (small broken pieces of rock) to low-lying areas (usually seas/oceans) • Eroded sediments will become sedimentary rock.

More Related