Sept10IgneousRocks.docx - EES:1030 - Igneous Rocks Study...

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EES:1030 - Igneous RocksStudy Guide Questions1.How do our three different types of rocks form? You should know the basics of the rockcycle.2.What is the difference between magma and lava? You should know which forms intrusively,and which forms extrusively.3.What determines our final type of igneous rock?4.From lecture, you should know how felsic and mafic minerals relate to plate tectonicsettings (which is associated with oceanic crust? Which is associated with continental crust?)We will discuss this more with volcanoes. How do we generally distinguish between thesetwo groups of minerals, and how do they differ chemically?5.What are our three different ways of generating melt and what plate tectonic settings arethey associated with?6.What is fractional crystallization, and how does it affect the rock that we might form?Relatedly, what is Bowen’s reaction series?7.What is a xenolith?8.You should be able to write a paragraph or two that relates viscosity and cooling speed tocrystal lattices and intrusive vs. extrusive environments. You should also be able todetermine which igneous rock textures are associated with intrusive vs. extrusiveenvironments. You DON’T have long answer questions on exams, but if you can write thatparagraph then it means you really understand viscosity well!9.Know how we classify igneous rocks, and know the different textural terms for matching(aphanitic, phaneritic, pegmatites, vesicular, porphyritic).Lecture DetailsROCKSare “...a naturally occurring solid aggregate of minerals...” (from the sometimesuntrustworthy but useful in this particular instance Wikipedia). Rocks can be mono-mineralic ormany-mineralic (they can, for example, be made up of all one mineral or have a variety ofconstituent minerals, depending on how and where they formed).Three Kinds of rocks:1.Igneous:cooled from molten material2.Sedimentary: aggregates of smaller grains3.Metamorphic: a sedimentary or igneous rock that has undergone high temperature orpressure, but has NOT melted all the wayRock cycle: you may remember this from previous science classes.Rocks can move between anyparts of the cycle, and can skip steps.IGNEOUS ROCKSform from eithermagma(molten material in the Earth-these areintrusive) orlava(molten material that reaches the Earth’s surface-these areextrusive).1

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Term
Fall
Professor
BradleyCramer
Tags
Igneous rocks

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