Which of the following best characterizes an angular unconformity?
A)Tilted strata lie below the unconformity; bedding in younger strata above is parallel to the unconformity.
B)Horizontal lava flows lie below the unconformity and horizontal, sedimentary strata lie above.
C)The discordant boundary between older strata and an intrusive body of granite.
D)Igneous dykes cutting through sills at an angle.

Question

Quizplus · Accepted Answer

An angular unconformity is characterized by tilted strata lying below the unconformity, while the bedding in younger strata above is parallel to the unconformity. This indicates that there was a period of deformation or uplift that caused the older strata to be tilted and eroded away before the deposition of the younger, parallel strata.

Which of the Following Best Characterizes an Angular Unconformity