Topset, foreset, and bottomset beds found together are indicative of ________ environments.

Question

Quizplus · Accepted Answer

The presence of topset, foreset, and bottomset beds in a sequence is a characteristic feature of a delta environment. Topset beds are formed by deposition of sediment on the delta plain, foreset beds are inclined beds deposited on the delta front, and bottomset beds are horizontal beds deposited on the basin floor. Alluvial fan environments typically do not have a well-defined deltaic sequence, lake bottom environments do not have foreset beds, and deep-marine environments do not have topset beds.

Topset, Foreset, and Bottomset Beds Found Together Are Indicative of ________