Name:SID:Lab 2:Maps, Geological Structures, Relative Age DeterminationsIntroduction:Maps can be some of the most interesting and informative printed documents you will ever see.Most of us are familiar with simple maps that indicate places and the roads you take to get fromone place to another, but maps can convey many kinds of information.In this lab we will learn tointerpret two very important maps used in geology and related disciplines: topographic maps andgeologic maps. We will also learn to interpret geological structures, and learn how they can beinferred from geologic mapsObjective:This laboratory is to introduce you to topographic and geological maps, cover some geologicalstructures associated with folding and faulting of rocks, practice making relative agedetermination of rocks and structures, and have you construct a geological cross section based oninformation presented on maps.Answers:Please answer the indented, numbered questions below onTHIS LAB – you will turn in thisdocument. Explanations should be concise; most questions can be answered with a few words, or asentence or two.All answers should be your own, but we encourage you to discuss and check youranswers with 2-3 other students. Discussion and explanation are terrific ways to learn! Labs aregraded out of 100 points, and then scaled accordingly.--------------------------------------------------------------------------------------------------------------Part 1: Topographic MapsTopographic maps are maps that provide information regarding the surface of the earth.The main feature of topographic maps is their representation oftopography: ridges,valleys, mountains, plains and other earth surface features, natural as well as man-made.Elevation is depicted on topographic maps by the use ofcontour lines. Contour lines arelines representing equal elevation across the landscape. Contours are drawn at regularintervals of elevation; these intervals vary between maps, but are typically specified at thebottom of the map or in the map legend. In addition, topographic maps provide a wealthof information regarding both natural and manmade features (see the topographic mapsymbol key).Map scale is a critical piece of information on all maps. Scale is the value thatrelates a map to the real world. The scale of a map allows the user to translate distanceson the map to distances on the ground. For instance, a map with a 1 to 12,000 scale(1:12000), tells us that for every unit of measure on the map, 12,000 of those units on theground are being depicted. With any map, the detail of features illustrated will depend onthe map scale.Study the topographic map showing the region of San Francisco (this map is alsoavailable online at:).
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