Which of the following would not be classified as a sedimentary formation?

Olivine is a mineral that is commonly formed through igneous processes, such as crystallization from molten rock, and is not created through sedimentary processes. Sedimentary formations typically arise from the accumulation and compression of sediment particles or organic material over time. Limestone, peat, and loess all demonstrate characteristics of sedimentary formations: limestone is formed from calcium carbonate deposits, peat consists of accumulated plant material, and loess is composed of wind-blown silt. Thus, olivine stands out as it originates from igneous activity, placing it outside of the sedimentary classification. Understanding the origins and formation processes of different types of rock and minerals is essential for distinguishing between igneous and sedimentary materials.