What are the three main types of sedimentary rocks?

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Multiple Choice

What are the three main types of sedimentary rocks?

Explanation:
Sedimentary rocks are categorized by how they form. They fall into three broad groups: clastic rocks formed from fragments of preexisting rocks that are weathered, transported, deposited, and lithified; chemical rocks formed when minerals precipitate directly from solution; and biochemical (organic) rocks formed from accumulated remains of living organisms or from minerals precipitated as a result of biological activity. Examples help: sandstone, shale, and conglomerate are clastic; rock salt and gypsum are chemical; limestone and coal are biochemical. This is why clastic, chemical, and biochemical are the standard trio used to describe the main types of sedimentary rocks. The other options mix terms that describe different rock classes (igneous or metamorphic) or textures, or rely on subcategories rather than the primary origin-based grouping.

Sedimentary rocks are categorized by how they form. They fall into three broad groups: clastic rocks formed from fragments of preexisting rocks that are weathered, transported, deposited, and lithified; chemical rocks formed when minerals precipitate directly from solution; and biochemical (organic) rocks formed from accumulated remains of living organisms or from minerals precipitated as a result of biological activity. Examples help: sandstone, shale, and conglomerate are clastic; rock salt and gypsum are chemical; limestone and coal are biochemical. This is why clastic, chemical, and biochemical are the standard trio used to describe the main types of sedimentary rocks. The other options mix terms that describe different rock classes (igneous or metamorphic) or textures, or rely on subcategories rather than the primary origin-based grouping.

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