Answer :
Final answer:
Limestone is generally the most abundant of the sedimentary rocks, followed by sandstone, and then mud rocks. The correct order of decreasing abundance is limestone, sandstone, and mud rocks. This reflects the processes involved in their formation and deposition.
Explanation:
Sedimentary Rocks Abundance
The students' question regards the order of abundance among different types of sedimentary rocks: Limestone, Sandstone, and Mud rocks. In general, the abundance of these sedimentary rocks varies based on environmental conditions and geological processes.
Limestone is typically the most abundant sedimentary rock, formed primarily from calcium carbonate, which comes from biological processes such as coral reefs and shell accumulation. Next in line is Sandstone, which is composed mainly of sand-sized particles, often derived from the weathering of other rocks. Finally, we have Mud rocks (which includes shales), which are less abundant but still significant in sedimentary environments.
Correct Order of Decreasing Abundance
Therefore, the correct order of decreasing abundance for the provided options is:
- Limestone
- Sandstone
- Mud rocks
Understanding the abundance and formation of these rocks is essential for studying sedimentary geology and the environmental conditions that contribute to their formation.
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