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KILIMANJARO: The Roof of Africa

Kilimanjaro is the highest mountain of Africa, the highest land-hosted volcano in the world, and possesses the only glaciers on the African continent – and it’s located just 3 deg south of the equator.

A stratovolcano (a volcano made of a mix of overlapping lava flows, ash, and cinder deposits that build to a conical shape), Kilimanjaro is one of about twenty volcanoes near the southern end of the East African Rift Valley. This valley is the surficial expression of a giant split developing in the African tectonic plate which will, in time, divide Africa into two new separate plates to be called the Somalian (to the east of the rift zone) and Nubian (on the west) with an intermediary “African” Ocean.

Keep reading


Venus: Crash Course Astronomy #14 By CrashCourse

Venus is a gorgeous naked-eye planet, hanging like a diamond in the twilight – but it’s beauty is best looked at from afar. Even though Mercury is closer to the sun, Venus is the hottest planet in the solar system, due to a runaway greenhouse effect, and has the most volcanic activity in the solar system. Its north and south poles were flipped, causing it to rotate backwards and making for very strange days on this beautiful but inhospitable world.

Table of Contents

Venus’s Size and Atmosphere 3:09
Hottest Planet in the Solar System 4:04
Slow Clockwise Rotation 6:02
Tremendous Volcanic Activity 8:31

This is Warren Cave in Antarctica, just one of several caves and passages carved in the ice around Mount Erebus. The cave is believed to have formed from melting due to the heat from the volcano. The scalloped ice, seen at the entrance to the cave, is likely caused from small air currents.


More information on Mount Erebus;

Image; Carsten Peter. (http://photography.nationalgeographic.com.au/photography/photo-of-the-day/mount-erebus-cave-peter/)


What Would Happen If Earths Revolving Speed Doubled?

SOURCE: What would happen if Earth’s revolving speed becomes twice of which it is now?

By: The Unthinkable.
Support The Unthinkable on Patreon


The Moon: Crash Course Astronomy #12 By CrashCourse

Join Phil for a tour of our capital-M Moon, from surface features, inside to the core, and back in time to theories about its formation.

Table of Contents:

Many Millions of Moons 0:27
Big Impact on Little Earth 3:42
Craters and Maria 2:15
Water on the Moon? H2O Yeah! 8:06

Volcanic ash burp on the Siberian snows

One of the more active regions of the ring of fire that marks the edge of the Pacific ocean where it is subducting beneath other plates is the Kamchatka Peninsula in Russia’s frosty Far East. The one that has been sprinkled with its own products in the form of dark grey ashfall is called Klyuchevskoy, a very active smoker indeed. The lava that exploded out of the vent and fragmented into dust formed as the mantle melted due to the rising water baked out of minerals in the subducting slab, some 150km deep in the entrails of the Earth. Several smoking peaks are visible in the photo giving us an idea of their density in this region, where some sort of crustal weakness such as a fault is allowing the magma to rise to the surface.

Our past posts on this Siberian volcano: http://bit.ly/1eDdqgz, http://bit.ly/1eDdqgz and http://bit.ly/1Dd8sCG, http://on.fb.me/1Dd74zS

Image credit: NASA


Scientists Create Tiny Zones of Climate Change

To study warming temperatures, the Rob Dunn Lab has set up small chambers to simulate climate change in the woods of North Carolina and Massachusetts. Heated air is pumped into the open-top chambers to see how predicted warming levels could affect plant and insect life. The experiment is one of the most robust of its kind, with six years of data and 12 chambers in two locations. Using insects as a starting point, the researchers hope to understand the wider changes even a few degrees could make.

By: National Geographic.
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