[SOLVED] ESS241 Lab 4 Geological cross-section R

ESS241

Lab 4: Geological cross-section

Due date: Oct. 14th, 2024, 11:00 pm for Monday Lab session  Oct. 17th, 2024 11:00 pm for Thursday Lab session

Total: 50 points

For this lab you will need

Graph paper

Mechanical Pencil or regular pencil with a sharpened point for neatness

Color pencils

Ruler

Protractor

Eraser

The artificial geological map on the last page shows several sedimentary layers. Using structure contours (strike lines) construct a geological profile along the line Y-Z. Do not exaggerate the profile (No vertical exaggeration). Determine thickness and orientation (dip direction and dip) of the individual layers. It is recommended that you draw your cross-section on Graph paper.

Marking scheme

a.   Strike lines on map- 5 point

b.   Topography on the cross-section (solid line for known, dashed for unknown)- 5 points

c.   Lithologies on the cross-section- 5 points

d.   Orientation of the lithologies (show your calculations)- 5 points

e.   Does the cross-section show the true dip or apparent dip of the lithologies? How do you know this? –  3 points

f.   True thickness of the lithologies B, C, D, E (show your calculations)- 5 points

g.   Title and north arrow- 1 point h.   Scale – 2 points

i.    Label Axes- 2 point

j.   Label outlier and inlier (on map and cross-section)- 4 points

k.   Imagine there is a deposition of new sediments in the eastern valley of your cross-section. What type of unconformity would you have here? – 2 points

l.   At what angle, to your original cross-section would you have to draw a second cross- section to see the dips of the lithologies at 10o ? (Show your calculations)- 6 points

m. Neatness (Legible handwriting, crisp lines, clean cross-section)- 5 points Length