Answer :
Final answer:
The deposition of one limestone unit on another is due to the process of sedimentation. Changes in sediment source, water chemistry, or sea level changes could change the depositional environments, creating distinct limestone layers. Geological processes or climatic conditions could trigger these changes.
Explanation:
One unit of limestone, such as Redwall, can get deposited on another unit of limestone, such as Mauv, through a process called sedimentation. In a marine environment, for instance, the accumulation of sediment can lead to the formation of limestone layers over time. This process can repeat itself to form stacked limestone units.
The differences in the two limestone units may suggest a change in depositional environments. Perhaps the source of sediment changed, or maybe local water chemistry or sea level fluctuations affected the rate or manner in which the limestone was deposited. These different conditions create layers with distinct properties and characteristics, including limestone color or fossil content.
Several events could cause two different limestones to deposit in the same region. These include geological processes like shifts in tectonic plates or climatic factors such as changes in sea level or weathering patterns. Each of these circumstances can alter the depositional environment and contribute to the development of diverse limestone units.
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