EAS100 Lecture Notes - Lecture 8: Mount Mazama, Sedimentary Rock, Tephra

• School: University of Alberta
• Department: Earth and Atmospheric Sciences
• Course: EAS100
• Professor: Alessi,Daniel

Document Summary

Eas 100 lecture 8 volcanoes and sedimentary rock. Volcanic landforms: shield volcano broad, dome-shaped, slopes of 5-10 . This type of collapse happens when a volcanic eruption occurs that empties the magma chamber underneath. Ex: when mount mazama erupted about 6 700 years ago, the resulting caldera was called crater lake. Shortly after, a small island formed within the lake called. Types of volcanoes: subaerial volcanoes (subaerial meaning under air) are above ground with the peak of the volcano exposed, there are also submarine and subglacial volcanoes (meaning volcanoes located underwater or deep underneath ice and glaciers. See pyroclastic flow from lecture 7, it is a highly destructive, fast-moving mass of gas enveloped particles. Geosphere: the sedimentary rock cycle: regolith, subject to weathering and erosion, deposition, sediment becomes sedimentary rock through cementation, stratigraphy. Regolith is the broken-up rock fragments on earth"s surface. It is formed when solid rocks break down.