The image shows a sandstone formation with visible bands of different colors. What do the bands indicate about how this sedimentary rock was formed?
Answers
Answer:The image shows a sandstone formation with visible bands of different colors. What do the bands indicate about how this sedimentary rock was formed? Choose two answers
A. The rock was made from more than one type of material
B. Water was absent during the compaction and cementation process
C. Sediments and other matter were deposited in layers before lithification
D. The rock was stretched horizontally by the pressure from surrounding rocks.
E. Layers of hot liquids in the rock cooled and solidified at different temperatures
Explanation:
Answer:
The visible bands of different colors in the sandstone formation indicate that the rock was formed through a process called delamination. Stratification refers to the stratification of sedimentary rocks that occurs when different types of sediment are deposited on top of each other over time.
Explanation:
Each sedimentary layer usually differs in composition, texture, or color from the upper and lower layers, resulting in visible bands of different color in the rock. The colors of the bands are usually determined by the mineral content of the sediments, with different minerals producing different colors.
Banding in the sandstone formation also indicates that the sediments were deposited in a relatively quiescent environment, such as a lake or river delta, where the sediments may have been deposited in discrete layers unperturbed by strong currents or other forces.
Collectively, the bands visible in the sandstone formation provide valuable information about the geological history of the area, including the types of sediments present and the environmental conditions under which they were deposited.
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