When a bed dips shallowly in the opposite direction of the regional dip, the apparent thickness on a cross-section is:

When a bed dips shallowly in the opposite direction of the regional dip, the apparent thickness on a cross-section is:

• A. Equal to the true thickness
• B. Unrelated to the thickness
• C. Greater than the true thickness
• D. Less than the true thickness

Answer: (C)

Apparent thickness is the thickness you measure on a cross-section, which is simply the projection of the true thickness onto the plane of the section. When a bed dips obliquely relative to the section, the line of intersection between the section and the bed stretches the separation between the top and bottom faces. If the bed dips shallowly in the opposite direction of the regional dip, the cross-section cuts the bed at an angle that increases that separation, so the apparent thickness on the section is larger than the true thickness.

Apparent thickness is the thickness you measure on a cross-section, which is simply the projection of the true thickness onto the plane of the section. When a bed dips obliquely relative to the section, the line of intersection between the section and the bed stretches the separation between the top and bottom faces. If the bed dips shallowly in the opposite direction of the regional dip, the cross-section cuts the bed at an angle that increases that separation, so the apparent thickness on the section is larger than the true thickness.