Step 1: Understanding the question.
The Patcham Formation is a geological unit, and the question asks for its age. The formation is known to be of Triassic age.
Step 2: Analyzing the options.
(A) Permian: This is incorrect because the Patcham Formation is not of Permian age.
(B) Triassic: Correct — The Patcham Formation dates to the Triassic period, a time following the Permian extinction event.
(C) Jurassic: This is incorrect as the Patcham Formation is not of Jurassic age.
(D) Cretaceous: The Patcham Formation does not date to the Cretaceous period.
Step 3: Conclusion.
The correct answer is (B) Triassic, as the Patcham Formation is of Triassic age.