Sedimentary Rocks

Physical Weathering

The process of breaking down rocks through mechanical forces without changing their chemical composition.

Chemical Weathering

The process of breaking down rocks through chemical reactions, leading to changes in the minerals' composition.

Erosion

The process of moving sediment from one location to another through natural forces such as water, wind, or ice.

Clastic Sedimentary Rocks

Rocks formed from fragments of pre-existing rocks and minerals, classified based on grain size.

Biochemical Sedimentary Rocks

Rocks formed from materials produced by living organisms, such as shells or plant material.

Organic Sedimentary Rocks

Rocks formed from the accumulation of organic matter, such as coal from plant remains.

Bed

A single layer of sedimentary rock.

Strata

Multiple layers of sedimentary rock, often with different compositions or colors.

Sedimentary Structure

Features found within sedimentary rocks that provide information about the environment of deposition.

Types of Sedimentary Structures

Examples include ripples, cross-bedding, and graded bedding.

Depositional Environments

Locations where sediment accumulates, including rivers, lakes, oceans, and deserts.

Deposited

The process of sediment being laid down or accumulated in a particular area.

Transgression

The landward movement of the sea, resulting in the flooding of coastal land.

Regression

The seaward movement of the sea, resulting in the exposure of previously submerged land.

Diagenesis

The physical and chemical processes that occur after sediment is deposited, transforming it into rock.

Lithification

The process of turning loose sediments into solid rock through compaction and cementation.

Paleoenvironmental Interpretation

The study of past environments based on the characteristics and formation of sedimentary rocks.