Question

Students want to investigate where sand on their local beach has discovered bits of metamorphic rock that matches a local outcrop 2 kilometers away from the beach. Put the following events in order to explain how the metamorphic rock became part of the beach sand in this location.

1) Weathering and erosion of the metamorphic rock at the outcrop
2) Transportation of the rock fragments by wind or water
3) Deposition of the rock fragments onto the beach
4) Mixing of the rock fragments with the existing sand on the beach
5) Formation of new sedimentary rock from the rock fragments and sand

Answer 1

The events to explain how the metamorphic rock became part of the beach sand in this location are weathering and erosion of the rock, transportation of rock fragments, deposition onto the beach, mixing with existing sand, and formation of new sedimentary rock.

Step-by-step explanation:

1. Weathering and erosion of the metamorphic rock at the outcrop
2. Transportation of the rock fragments by wind or water
3. Deposition of the rock fragments onto the beach
4. Mixing of the rock fragments with the existing sand on the beach
5. Formation of new sedimentary rock from the rock fragments and sand

Answer 2

Answer: 1,2,3,4,5

Explanation: To explain how the metamorphic rock became part of the beach sand, the following events can be put in order:

1) Weathering and erosion of the metamorphic rock at the outcrop:

The process starts with the weathering and erosion of the metamorphic rock at the outcrop. Over time, factors like wind, water, and temperature changes cause the rock to break down into smaller fragments or sediments.

2) Transportation of the rock fragments by wind or water:

Once the rock fragments are weathered and eroded, they can be transported by wind or water. For example, if the beach is near a river or a coastline with strong waves, water can carry the rock fragments and deposit them on the beach. Similarly, wind can blow the smaller rock fragments and bring them to the beach.

3) Deposition of the rock fragments onto the beach:

After transportation, the rock fragments are deposited onto the beach. This means that they settle or come to rest on the beach surface. The deposition can happen as a result of the slowing down of water currents or the weakening of wind force. The rock fragments may accumulate in specific areas, forming layers or patches.

4) Mixing of the rock fragments with the existing sand on the beach:

Once the rock fragments are deposited on the beach, they mix with the existing sand. This mixing can happen due to natural processes like wave action or human activities. The rock fragments become integrated with the sand, creating a blend of different materials.

5) Formation of new sedimentary rock from the rock fragments and sand:

Over time, as the rock fragments and sand continue to accumulate and undergo compaction, they can form new sedimentary rock. This process is known as lithification. The weight of the overlying sediments and the binding of particles by minerals or cementing agents can transform the loose sediment into a solid rock layer.

It's important to note that the order of these events can vary depending on specific local conditions and geological factors. Additionally, other factors like tectonic activity or changes in sea level can also influence the formation and composition of beach sediments.