Answer :
Final answer:
Limestone is a sedimentary rock primarily made of calcite that forms in underwater environments. Over time, it can change through weathering, chemical reactions, and metamorphism into marble. These changes illustrate the dynamic nature of geology and the transformation of rocks.
Explanation:
What Type of Rock is Limestone?
Limestone is a sedimentary rock, which means it is formed from the accumulation of sediment. It primarily consists of mineral calcite (calcium carbonate) and can also contain other minerals, such as clay, quartz, and iron oxides. Limestone typically forms in underwater environments, such as oceans and lakes, through the compaction of biological debris like shells and coral, as well as through chemical precipitation.
How Limestone Changes Over Time
Over long periods, limestone can undergo significant changes due to natural processes including:
- Weathering and Erosion: Over time, limestone can be altered by wind and water, which can break it down into smaller particles, leading to the formation of soil and sediment.
- Chemical Reactions: Limestone is susceptible to dissolution in acidic environments, often caused by rainfall containing dissolved carbon dioxide, leading to features such as caves and sinkholes.
- Metamorphism: If subjected to high pressure and temperature over geological time, limestone can metamorphose into marble, a denser and more crystalline rock.
These processes show that limestone is not only a static rock but is part of a continuous cycle of geological change, adapting to its environment over time.
Learn more about Limestone here:
https://brainly.com/question/30717890
