Final answer:
Magma emplacements are not sedimentary structures; sedimentary structures include mud cracks, cross-beds, and graded bedding.
Explanation:
Magma emplacements are not a sedimentary structure, as they are related to igneous rocks and not sedimentary processes. Sedimentary structures include features like mud cracks, cross-beds, and graded bedding that form in sedimentary environments through processes such as deposition, erosion, and compaction.
Learn more about Sedimentary Structures here:
https://brainly.com/question/50485025
