The contours are based on a single horizon (e.g. folds, are represented in three dimensions. With less well control, seismic mapping is often incorporated into the structure mapping so the actual structural contour map is a composite of both. Geology is a very visual science, and the use of a variety of map types is common. These maps depict in detail ground relief (landforms and terrain), drainage (lakes and rivers), forest cover, administrative areas, populated areas, transportation routes and facilities (including roads and railways), and other man-made features. Contour lines connect points of equal elevation. The map is read in the same way as a topographic contour map. Also, line AB on the map cuts into the layer, whereas AC does not: AC is the strike. FREE topographic maps online 24/7. We recognize three major tectonic zones that correspond closely to Precambrian-basement structures and/or terrane boundaries. Take data points and make a contour map-more complex than fault map because more structures Now find trace-line where to intersect;-overlay map 1 on map 2-look for points of equal elevation on both fault and horizon maps-mark off two points, this will give you the trace of the fault If this is the case, it is a good idea to note where actual well control points are so that one can keep in mind which fault blocks have actual well control. Contour Maps - They're About Finding Underwater Structures. ... while the bank looks to be an uninteresting gravel bank, below water there are some structural features that have bass attracting appeal. A breakline, a pinch point on that breakline and a creek bed. As confirmation, note that contacts nearly parallel the elevation contours near the map center. View all of our high-quality shaded relief USGS topo maps, Forest Service maps, satellite images, and custom map layers for free. A A,C B B C We begin our focus on the basic part of a topographic map, all those lines. 200m Structure contour 200m Fig. An accurate meaning of thickness is critical in these and other analyses (see Conversion of well log data to subsurface stratigraphic and structural information).. Isopach. Interpretations of depositional trends, pre-and syndepositional structural development, and reservoir storage capacity are based in large part on thickness information. Topographic map coverage of Canada is based on the National Topographic System (NTS). Sometimes. This lesson will differentiate between three types of geologic maps: topographic, cross-sectional, and structural. These are known as contour lines. Hot damn, good stuff! The Bighorn Basin is a large intermontane sedimentary and structural basin that formed during the Laramide orogeny. 5.3 Surfaces are horizontal here, so strike is not uniquely defined here. A map on which structural features, e.g. Structure Contour Maps Structure Contour Maps Structure Contour Maps Structure Contour Maps A contour that connects points of equal thickness. the top of a bed), the position of that horizon being given with reference to a datum plane. Topographic Map Basics. Commonly, the isopachs, or contours that make up an isopach map, display the stratigraphic thickness of a rock unit as opposed to the true vertical thickness. The resulting six structural contour maps add to our understanding of the tectonic development of Kansas and suggest the complexity to be expected in neighboring areas. The first commercial hydrocarbon production in the Bighorn Basin was established in 1906 from Cretaceous reservoirs at Garland field followed by the discovery of Greybull field in 1907. Return to Fishing and Lake Maps from Contour Maps. Strike is not uniquely defined here large part on thickness information the layer, AC... 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