Map interpretation: Identify unconformity type, name bold black features, and describe cross-section along A-B.

Here are the answers to the remaining parts of the question.

1)c) i) What kind of unconformity is found on map?

The map displays an angular unconformity. This is evident where older, folded sedimentary layers (such as the horizontally-lined and dotted units) are truncated by an erosional surface and then overlain by younger, relatively flat-lying sedimentary layers (like the blank unit or the unit with widely spaced dashes). The angular discordance between the tilted older strata and the more horizontal younger strata defines this type of unconformity.

1)c) ii) Name the two features in bold black.

The two features represented by bold black lines on the map are:

1. Fault: A prominent bold black line, typically with a fault symbol (e.g., a bar on one side), indicating a fracture in the Earth's crust where there has been displacement of rock units.
2. Fold Axis: Bold black dashed lines with arrows, representing the axial traces of the folds (anticlines and synclines).

1)d) Draw a line of section along A - B. Include a key.

As I cannot physically draw a cross-section, I will describe the process and the key geological features that would be depicted along the line of section A-B.

Description of drawing the line of section along A-B:

1. Establish a baseline: Draw a horizontal line representing the length of the section from point A (northwest) to point B (southeast).
2. Mark intersections: Project all geological boundaries (contacts between rock units, fault lines, fold axes, and the unconformity) from the map onto this horizontal baseline.
3. Plot dips: At each intersection point, use the dip symbols on the map to draw the orientation and angle of the rock layers.
4. Construct layers: Connect these dip lines to form the geological layers. The section would show:
   • Starting from A, the horizontally-lined unit dipping towards the east.
   • A fault, likely a normal fault, cutting through and displacing the rock units.
   • East of the fault, the dotted unit, which would then fold into a syncline (dips changing from west to east).
   • Further east, the horizontally-lined unit, folding into an anticline (dips changing from east to west).
   • An angular unconformity, where the folded older units are truncated by an erosional surface.
   • Overlying the unconformity, a younger, relatively flat-lying unit (e.g., the blank unit or the unit with widely spaced dashes) extending to point B.
5. Include a key: A key would be provided to identify each rock unit by its pattern, and to label the fault, fold axes (anticline and syncline), and the angular unconformity.