https://padlet.com/r_mortley/tbc2q38vxlkx Made with an open mind en-us 2017-11-10 13:46:26 UTC 2026-02-21 00:38:21 UTC hello@padlet.com r_mortley https://padlet.com/r_mortley/tbc2q38vxlkx/wish/205681659 Cinder cone, also called scoria cone volcanoes are usually found on the borders of shield volcanoes, stratovolcanoes, and calderas. The characteristics of cinder cones are that lava comes from one central vent, often not very tall but has steep sides, relatively small eruptions compared to other volcanoes and if the explosion continues for a long time it could form a shield volcano. The volcano is built when particles of gas-charged lava is blown into the air, it breaks into small fragments that cools very quickly as it falls as ashes (cinders) around the vent which continues to form a cone shape volcano. An example of a cinder volcano is Paricutin which grew out of a corn field in Mexico in 1943. Eruptions continued for nine years, which built the cone to a height of 424m and produced lava flows that covered 25 km². ]]> 2017-11-10 13:46:43 UTC https://padlet.com/r_mortley/tbc2q38vxlkx/wish/205681659 r_mortley https://padlet.com/r_mortley/tbc2q38vxlkx/wish/205681682 Located example: Kilauea on the island of Hawaii: In the following, with references to the Kilauea volcano in the island of Hawaii, I’m going to describe and explain the characteristics of a shield volcano.Usually shield volcanoes are a common product of hotspot volcanism, but they also can be found at constructive boundaries. The Kilauea is wide based, low and with gently sloping, as it erupts runny lava (basaltic) which travels further from the crater before it cools. The lava from each eruption hardens, and the next eruption flows over and hardens on top of the previous one. Over time, the multiple eruptions build up, one on top of the other, and give us a shield volcano shape.Unlike composite volcanos, shield volcanos have a much larger arial extend. However the altitude of eruptions are much lower compared to composite volcano.Another characteristic that allows shields to grow so large is called a lava tube. As lava flows away from the site of an eruption, it cools. The lava exposed to the air cools and hardens more quickly than the lava underneath it. Depending on the conditions, that outer lava can harden into a shell that insulates the deeper lava. The insulation keeps it fluid longer and allows it to travel far from the eruption site.Shield volcanoes tent to erupt frequently, but relatively gentle. This is because the lava contains less silica, which means that it is less sticky and doesn’t purge up the volcano.The bulk of a shield volcano is the shield itself, but there are other important parts as well. The top of the volcano is an indentation called the caldera. Lava erupts from this site, but it is not the only place where lava emerges. Vents on the sides of the shield are openings through which lava can also erupt.Under the caldera is a magma chamber deep below the crust. Plumes of magma from the chamber work upward through cracks in the crust. Only if water gets into the vent the shield volcano eruptions are explosive.]]> 2017-11-10 13:46:47 UTC https://padlet.com/r_mortley/tbc2q38vxlkx/wish/205681682 r_mortley https://padlet.com/r_mortley/tbc2q38vxlkx/wish/205681762 2017-11-10 13:46:58 UTC https://padlet.com/r_mortley/tbc2q38vxlkx/wish/205681762