Question

Pick the wrong statement about recumbent fold.

(a) It has the arch, which is zone of curvature

(b) It has the shell, which is the inner zone, made up of mostly igneous rocks

(c) It has the shell, which is the outer zone, made up of mostly sedimentary rocks

(d) It has the core, which is the innermost zone, maybe made up of igneous rocks and metamorphic rocks

The question was asked in exam.

My query is from Classification of Folds topic in division Folds and Folding of Engineering Geology

Answer 1

Correct option is (b) It has the shell, which is the inner zone, made up of mostly igneous rocks

Explanation: The shell part of a recumbent, which is the outer zone, is mostly made up of sedimentary rocks. Hence the second statement is wrong regarding it.