Synclines and anticlines–rock layers pushed into massive wrinkles Science Education for the Early Grades › Forums › Volume Two › Learning Progression “D”: EARTH AND SPACE SCIENCE › Lesson D-11A. Uncovering the Earth’s Past › Synclines and anticlines–rock layers pushed into massive wrinkles This topic has 0 replies, 1 voice, and was last updated 3 years, 5 months ago by Bernard Nebel. Viewing 0 reply threads Author Posts June 17, 2019 at 2:34 pm #7674 Bernard NebelKeymaster The settling of clay, silt, and sand particles necessarily leads to horizontal layers. However, we often see such layers curved up or down, the result of continental drift pushing horizontal layers into wrinkles. Type into your browser: syncline images Type into your browser: anticline images Author Posts Viewing 0 reply threads You must be logged in to reply to this topic.