The Contour Map, part of Section C, should only be used for the answering of the Geologic Geometry Option (Question C-1) - Leaving Cert DCG - Question C.1 - 2010

Identify where the drawn lines intersect with the contour lines on the map. Mark these intersection points clearly and label them. Then, use these points to sketch the corresponding curve that represents the terrain.

For drawing parallel lines at 10m intervals, follow the same technique as before, starting from A and moving towards B. This time, ensure the segments are longer to accommodate the embankment requirements.

Repeat the process of identifying intersections with the contour lines at the 10m intervals you just drew. Draw the equivalent curve based on these new intersection points.

To draw the required arc, start from point B and curve the line upwards towards point C, maintaining smoothness and ensuring it aligns with the existing contours.

Draw parallel lines at 10m intervals similar to the previous tasks, this time between points B and C. Maintain consistency and clarity in your line work.

Identify intersections of your newly drawn lines with existing contours in the area between B and C. Mark these intersections and use them to draw a smooth connecting curve that follows the terrain.

To establish additional points P and Q, analyze the intersection areas of your drawn curves and the contour lines. Mark these points to facilitate completion of the intersection.

Complete the intersection by connecting points P and Q through a smooth line that accurately represents the transition between the level and the rising sections.

To determine the dip of the stratum, first draw the line X1, Y1 which is perpendicular to the strike line. Measure the angle between the two lines to establish the dip angle.

Once you've drawn the perpendicular, confirm the size of the angle created by the intersection to yield the dip measurement.

From point F, draw a vertical line that measures 25mm to visually represent the thickness needed for the stratum.

Determine the stratum’s thickness by measuring from point F to the designated point along the vertical line, ensuring accurate representation of the required thickness.