The peritidal depositional environment is complex ([[:file:carbonate-reservoir-models-facies-diagenesis-and-flow-characterization_fig2.png|Figure 2]]). Sediments deposited between mean high and mean low tide are called ''intertidal sediments'', sediments deposited above mean high tide are called ''supratidal sediments'', and sediments deposited below mean low tide are called ''subtidal sediments''. In arid and semi-arid climates, evaporite flats (sabkhas) are present from which [[gypsum]] and [[halite]] are deposited. [[Sand dunes|Eolian sand dunes]] composed of siliciclastic or carbonate grains may form on the supratidal surface. | The peritidal depositional environment is complex ([[:file:carbonate-reservoir-models-facies-diagenesis-and-flow-characterization_fig2.png|Figure 2]]). Sediments deposited between mean high and mean low tide are called ''intertidal sediments'', sediments deposited above mean high tide are called ''supratidal sediments'', and sediments deposited below mean low tide are called ''subtidal sediments''. In arid and semi-arid climates, evaporite flats (sabkhas) are present from which [[gypsum]] and [[halite]] are deposited. [[Sand dunes|Eolian sand dunes]] composed of siliciclastic or carbonate grains may form on the supratidal surface. |