(EEPE) Eons Eras Periods Epocs Cambrien Explosion Mass amount of fossils found in the Cambrien time period Names come from location Precambria 88.1% of the geological time scale Geologic Range The existence of an organism Methods of dating rocks Absolute Age dating (1896) Half lives. Jangus you know this Relative Age dating You know this too gumbus Plate Tectonics Lithosphere is divided into plates 7 large plates 20 smaller plates Rigid lithosphere Rest on the asthenosphere (the
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Quartz can be found in all sorts of rocks. Igneous rocks sometimes contain large quartz crystals. Mica minerals Mica minerals make some rocks sparkle! They are often found in igneous rocks such as granite and metamorphic rocks such as schist. Feldspar Feldspar is the most common mineral in the Earth’s crust‚ so you are very likely to find it in the rocks you collect! It is found it all of the three rock types‚ but is most common in intrusive igneous rocks like granite where the crystals look
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Chapter 1 Lecture Earth: An Introduction to Physical Geology Eleventh Edition An Introduction to Geology Tarbuck and Lutgens © 2014 Pearson Education‚ Inc. The Science of Geology • Geology is the science that pursues an understanding of planet Earth • Physical geology examines Earth materials and seeks to understand the many processes that operate on our planet • Historical geology seeks an understanding of the origin of Earth and its development through time © 2014 Pearson Education‚ Inc
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our planet over time through rocks. Rocks are divided into three major classifications; • Igneous- rocks created by volcanism and the cooling/ crystallization of magma. • Sedimentary- rocks created by the compaction and cementation of sediment created by the weathering of pre-existing rocks of igneous‚ metamorphic or sedimentary origin. • Metamorphic- rocks that are formed by metamorphosing pre-existing rocks through heat and pressure. Metamorphic rocks can be made from any of the
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producer. [3 marks] i. _________________________________ ii. _________________________________ iii _________________________________ 5) In the rock cycle shown in the figure below‚ give the name of the rock that marked as (a)‚ (b)‚ and (c). [3 marks] (b) (c) (a) 6) What is clastic sedimentary rock and list down two examples of this rock. [4 marks] __________________________________________________________________ __________________________________________________________________ _
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a solution remains unsaturated‚ mineral crystals may precipitate False Magma is often a slushy mix of molten rock‚ gases‚ and minerals crystals True The elements found in magma are quite different from those found in Earth’s crust False Silica is the most abundant command found in magma True Magmas are classified as basalt‚ andesitic‚ or rhyolitie True In the laboratory‚ rocks must be heated from 8000 C to 12‚000 C before they melt False Heat in the upper mantle and lower crust may come
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in better understanding the earth integrate chemistry‚ physics‚ and biology into the following sciences: Meteorology - the study of: the atmosphere weather and climate Geology - the study of the Earth‚ and is broken into Physical geology minerals rocks Earth processes - mountain building‚ earthquakes‚ volcanoes‚ etc. Historical geology - Earth’s origin and it’s past physical biological Oceanography - study of the Oceans Composition and movement of seawater Seafloor topography and sea life Astronomy
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Telling Geologic Time Putting it in perspective Determining geological ages • Relative age dates – placing rocks and events in their proper sequence of formation • Numerical dates – specifying the actual number of years that have passed since an event occurred (known as absolute age dating) Figure 1-15 (p. 16) Geologic Time Scale. Uniformitarianism The physical‚ biological and chemical principles acting on the Earth in the present also acted on the Earth in the past
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1. Compare the age of igneous rock found near the mid-ocean ridge with that of igneous rock found farther away from the ridge. The ages of the igneous rock found near the mid-ocean ridge was younger than the igneous rock found farther away from the ridge. This is because of convection currents. Magma rises because it is less dense. It is forced out of the ridge‚ it spreads apart‚ and when it cools‚ it becomes new seafloor. This is why newer seafloor (igneous rock) is younger when it is closer to
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References: Strickler‚ M. (1997‚ April 1). What are the 3 basic types of rocks? Retrieved March 10‚ 2013‚ from GeoMania Community College and Secondary Curriculum: http://jersey.uoregon.edu/~mstrick/AskGeoMan/geoQuerry13.html Withgott‚ J.‚ & Brennan‚ S. (2011). Environment: The science behind the stories (4th ed.). Upper Saddle
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