SOUTH Judith River Eagle Warm Mowry Shak Kooter Thermope Jurassic Ellis Seyenite Porphry Metamorphic Rocks Gravity-Slide Faults Bearpaw Shale 3 Mississippian Mission Canyph Devonian Jefferson Limestone an Platheadbandstor Bakken/3 Forks Shale NORTH Ordovician Bighorn Dolomite Little Rocky Mountains No Scale - Drawing is approximate length of Reservation Hogeland Basin Creating a cross-section requires some subjective decisions on your part, but it needs to be geologically reasonable. For example, the thickness and dip of a planar layer should remain relatively constant unless the map data requires otherwise. Planar layers should also be laterally continuous unless there is evidence otherwise. Similarly, keep the structure as simple as you can. Steps to producing a cross section: I. Choose the location and direction of the profile on the geological map (usually a straight line) II. Draw or plot the topography of the profile on the cross-section III. Add the geological features from the map onto the topography, e.g. contacts and faults IV. V. For planar layers and surfaces, use the approximate dip to start projecting these features into depth Fill in the rest of the cross-section as necessary and the different units Elevation A 86 Mt Tomah Richmond Mona Vale Distance

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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Transcribed Image Text:SOUTH Judith River Eagle Warm Mowry Shak Kooter Thermope Jurassic Ellis Seyenite Porphry Metamorphic Rocks Gravity-Slide Faults Bearpaw Shale 3 Mississippian Mission Canyph Devonian Jefferson Limestone an Platheadbandstor Bakken/3 Forks Shale NORTH Ordovician Bighorn Dolomite Little Rocky Mountains No Scale - Drawing is approximate length of Reservation Hogeland Basin Creating a cross-section requires some subjective decisions on your part, but it needs to be geologically reasonable. For example, the thickness and dip of a planar layer should remain relatively constant unless the map data requires otherwise. Planar layers should also be laterally continuous unless there is evidence otherwise. Similarly, keep the structure as simple as you can. Steps to producing a cross section: I. Choose the location and direction of the profile on the geological map (usually a straight line) II. Draw or plot the topography of the profile on the cross-section III. Add the geological features from the map onto the topography, e.g. contacts and faults IV. V. For planar layers and surfaces, use the approximate dip to start projecting these features into depth Fill in the rest of the cross-section as necessary and the different units