The document discusses different sedimentary environments and provides examples of each:
1) An example of erosion on a small scale showing harder surfaces preventing erosion underneath.
2) The marine environment being the continental shelf underwater, as seen in a photo of the Pacific Ocean.
3) A photo example of a continental environment with mountains collecting snow that melts into channels and deposits sediments downstream.
4) Transitional environments like coastlines and beaches seen in a photo of the author at a beach town as tides change the coastline exposure.