The reservoir for the sedimentary cycle exists in

Options

A. earth crust
B. organic sediments
C. calcareous sediments
D. limestone

Answer

**Step-by-Step Solution:**

1. **Understanding the Sedimentary Cycle**: The sedimentary cycle refers to the movement and exchange of sedimentary materials through various geological processes. It involves the weathering of rocks, transportation of sediments, and their eventual deposition.

2. **Identifying Reservoirs**: In biogeochemical cycles, a reservoir is a natural storage location for substances. For the sedimentary cycle, we need to identify where sediments are primarily stored.

3. **Evaluating the Options**:
- **Earth Crust**: This is the outermost layer of the Earth, which contains a variety of minerals and sediments. It is a significant reservoir for many elements involved in sedimentary processes.
- **Organic Sediment**: While organic sediments are part of the sedimentary cycle, they are not the primary reservoir.
- **Calcareous Sediment**: This type of sediment is composed primarily of calcium carbonate but is also not the main reservoir.
- **Limestone**: Limestone is a type of rock formed from calcareous sediments, but again, it is not the overarching reservoir for the sedimentary cycle.

4. **Conclusion**: After evaluating the options, it is clear that the main reservoir for the sedimentary cycle exists in the Earth’s crust, as it contains a diverse array of sediments and minerals.

**Final Answer**: The reservoir for the sedimentary cycle exists in the Earth’s crust.

---