GLG 112 1st Edition Lecture 23Outline of Last Lecture I. Shield VolcanoesA. Appearance B. FormationC. LocationsD. Examples Outline of Current LectureII. Cinder conesA. AppearanceB. Formation1. Strombolian eruptions2. Lava flowsC. LocationsD. Examples Current LectureAppearanceThey have a circular base with a large crater in the middle. They have steep slopes at about a 30-40 degree angle. They are pretty small compared to other types of volcanoes. They are madeout of loose material called scoria or cinder. FormationThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Formed by volatile-rich basalt. Comes through strombolian eruptions and lava flows. Strombolian eruptions are volatile (gas) rich eruptions. The lava goes up, hardens, and comes back down. Lava flows ooze from the bottom of the cinder cone. These volcanoes only erupt once. LocationsCinder cones can be found anywhere except the seafloor. There is too much pressure there. They are commonly found on old shield volcanoes. They also commonly occur in clusters. They erode pretty quickly too considering they are made of loose material. Examples1. SP Crater in Northern Arizona.2. Sunset crater in Northern
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