Which of the following rocks does not belong to the sedimentary classification?

In the context of geological classifications, each type of rock is categorized based on its formation process. Sedimentary rocks are formed from the accumulation of sediment, which can include mineral and organic particles.

Limestone, peat, and loess are all classified as sedimentary rocks. Limestone is primarily composed of calcium carbonate, which can form through biological processes, such as the accumulation of shells and corals, or through chemical precipitation. Peat is an accumulation of organic material, primarily from decaying plant matter, and can eventually form coal under the right conditions. Loess is a wind-blown silt that is deposited in layers, also classifying it as a sedimentary rock.

Olivine, on the other hand, is a mineral that is primarily found in igneous and metamorphic rocks, specifically in mafic and ultramafic rocks such as basalt and peridotite. It forms from the crystallization of molten rock and is not a product of sedimentary processes. Therefore, olivine does not fit into the sedimentary category, making it the correct choice in this question. Understanding these classifications is essential in geological and environmental health studies, as it provides insight into rock formation processes and the types of materials that can affect soil and